A system for predicting the fireproof performance of a gypsum-based fireproof coating

Abstract

The application discloses a kind of fireproof performance prediction systems of gypsum-based fireproof coating, it is related to gypsum production technical field, including: unit generation module, for establishing continuous development path along the continuous surface relationship between the adjacent positions of target component surface, identify geometric mutation center, connection structure center or coating turning center, and with any one in geometric mutation center, connection structure center or coating turning center as starting position, expand to the adjacent surface area around starting position continuously covered by gypsum-based fireproof coating, to the place where continuous coating boundary terminates, connection structure transition or geometric mutation termination stops, generates local prediction unit.The application establishes continuous development path along the surface of target component, identifies geometric mutation center, connection structure center or coating turning center, and generates local prediction unit accordingly, so that the fireproof performance prediction object is changed from overall area or regular area to local prediction unit constructed around complex key parts.

Description

Technical Field

[0001] This invention relates to the field of gypsum production technology, specifically to a fire resistance performance prediction system for gypsum-based fire-retardant coatings. Background Technology

[0002] Gypsum-based fire-retardant coatings, due to their good thermal insulation properties, construction adaptability, and engineering application value, have been widely used for fire protection of steel structure beams, steel structure columns, and various steel structure connections. In actual engineering, gypsum-based fire-retardant coatings are usually applied to the surface of target components by spraying or troweling to delay the transfer of heat to the component body under fire conditions, thereby improving the fire resistance of the component under fire conditions. Regarding the performance evaluation of this type of fire-retardant coating, existing technologies usually combine coating thickness, component type, construction conditions, and fire conditions to analyze and predict the fire-retardant effect of the coating. In existing technologies, the fire resistance performance analysis of gypsum-based fire-retardant coatings typically employs methods such as overall area analysis, fixed area division, or calculation based on nominal thickness parameters to evaluate the protective effect of the fire-retardant coating. These technical solutions can provide effective references for fire protection design and engineering acceptance in scenarios with regular components, regular coverage conditions, and relatively stable construction conditions. At the same time, some existing technologies have also begun to pay attention to the impact of factors such as construction layers, coating defects, service disturbances, and local boundary changes on fire resistance performance in order to improve the consistency between fire resistance performance analysis and engineering practice. However, with the widespread application of complex steel structure nodes, irregularly shaped components, and multi-layer construction coatings in engineering, the actual protective state of gypsum-based fire-retardant coatings exhibits stronger local variability. On the one hand, local prediction areas cannot always be accurately characterized by regular boundaries or fixed partitions; on the other hand, nominal thickness cannot fully reflect the actual heat insulation contribution of multi-layer protective structures in the fire-exposed direction. In addition, disturbances such as mechanical vibration, transportation impact, and load deformation on interlayer interfaces and boundary areas will further change the coating's retention state. Under these circumstances, how to further improve the pertinence and rationality of fire performance prediction for gypsum-based fire-retardant coatings by focusing on the generation of local prediction units, the formation of effective fire-retardant thickness, the mapping of disturbance attenuation trajectories, and the formation of actual protective state has become a technical problem to be solved. Therefore, this invention proposes a fire performance prediction system for gypsum-based fire-retardant coatings. Summary of the Invention

[0003] The purpose of this invention is to provide a fire resistance performance prediction system for gypsum-based fire-retardant coatings to solve the problems mentioned in the background art.

[0004] This invention can be achieved through the following technical solution: a fire resistance performance prediction system for gypsum-based fire-retardant coatings, comprising: The unit generation module is used to establish a continuous unfolding path along the continuous surface relationship between adjacent positions on the surface of the target component, identify the geometric change center, the connection structure center or the covering transition center, and take any one of the geometric change center, the connection structure center or the covering transition center as the starting position, and extend to the adjacent surface area continuously covered by gypsum-based fireproof coating around the starting position, until the continuous covering boundary, the connection structure transition or the geometric change termination point, to generate local prediction units. The thickness forming module is used to obtain the total thickness of the gypsum-based fireproof coating within the local prediction unit, decompose it into multiple layered protection sections along the fire direction, distinguish between continuous participation layer, restricted participation layer and isolated participation layer, and form an effective fireproof thickness based on the continuous participation layer and restricted participation layer. The disturbance mapping module is used to map mechanical vibration, transportation impact and load deformation to the segmented interface and boundary of the local prediction unit according to the direction, intensity and location of action, forming interface-preserving attenuation trajectory and boundary-preserving attenuation trajectory. The state formation module is used to determine the current bonding stability and the current coverage stability based on the effective fireproof thickness, the interface retention attenuation trajectory, and the boundary retention attenuation trajectory, and to form the actual protection state. The performance estimation module is used to identify the fire-exposed surface segment that first loses continuous protection capability based on the actual protection status. When the fire-exposed surface segment meets the penetration weakness condition, it determines the heat breakthrough initiation surface and estimates the overall fire resistance performance of the target component based on the effective fireproof thickness corresponding to the heat breakthrough initiation surface, the actual protection status, and the penetration weakness condition.

[0005] A further technical improvement of the present invention is that the boundary termination determination step of the unit generation module for generating local prediction units includes: Along the current expansion direction, which extends from the starting position to the adjacent surface area continuously covered by the gypsum-based fireproof coating around the starting position, continuously collect the positions of the continuous coverage boundaries, the distribution of the connection structure, and the geometric abrupt change positions adjacent to the current expansion position; When a boundary interruption occurs between adjacent continuous enclosing boundary positions, the interruption position is determined as the termination point of the continuous enclosing boundary. When the spacing between adjacent connection structures changes from no more than the preset connection spacing to more than the preset connection spacing, the location of this spacing change is determined as the transition point of the connection structure. When the boundary turning angle corresponding to an adjacent geometric change position changes from not less than a preset turning angle to less than a preset turning angle, the position of the change in turning angle is determined as the end of the geometric change. When any of the termination conditions—either at the continuous envelope boundary termination, the connection structure transition, or the geometric abrupt termination—are met first, the current expansion stops, and the corresponding location is determined as the boundary of the local prediction unit.

[0006] A further technical improvement of the present invention is that: after generating local prediction units, the unit generation module includes: Determine whether there is a common region between adjacent local prediction units formed by expansion from different starting positions; When a public area exists, the public area is defined as an overlapping area; Multiple sequentially arranged sampling positions are selected along the extension direction of the overlapping region, and the boundary tangents of the corresponding boundaries of two adjacent local prediction units are extracted at each sampling position. Calculate the angle between the two boundary tangents at each sampling location as the cutting angle, forming a sequence of cutting angles arranged along the extension direction of the overlapping region; When the cutting angle sequence continues to decrease at a preset number of consecutive sampling positions, the overlapping area is incorporated into the local prediction unit where the end point of the continuously decreasing segment falls. When the cutting angle sequence continues to increase at a preset number of consecutive sampling positions, the position where the distance to the corresponding boundary of two adjacent local prediction units in the overlapping area is equal is determined as the boundary cutting position; When the cutting angle sequence contains both continuously decreasing and continuously increasing segments within the overlapping region, the boundary between the continuously decreasing and continuously increasing segments is determined as the boundary relocation location, and the boundaries of two adjacent local prediction units are redefined based on this boundary relocation location. A further technical improvement of the present invention is that: along the extension direction of the overlapping region, the difference in the cutting angle corresponding to adjacent sampling positions is calculated; When multiple consecutive cut-in angle differences are all less than zero and the number of consecutive cut-in angle differences is not less than a preset number, the cut-in angle sequence is determined to continuously decrease at a preset number of consecutive sampling positions. When multiple consecutive cut-in angle differences are all greater than zero and the number of consecutive cut-in angle differences is not less than a preset number, the cut-in angle sequence is determined to continuously increase at a preset number of consecutive sampling positions.

[0007] A further technical improvement of the present invention is that the step of the thickness forming module distinguishing between continuous participation layers, restricted participation layers, and isolated participation layers includes: Read the interface type corresponding to the fire-affected side segment boundary and the unaffected side segment boundary of each layer of protection section in sequence along the fire direction; When both the fire-side segment boundary and the unfire-side segment boundary are construction interlayer interfaces, or when one side of the fire-side segment boundary and the unfire-side segment boundary is the fire-side surface or the unfire-side surface and the other side is the construction interlayer interface, the layered protection segment is defined as a continuous participation layer. When one side of the fire-exposed segment boundary and the unexposed segment boundary is a density change interface or an adhesion state change interface, and the other side is a construction layer interface, a fire-exposed surface, or an unexposed surface, the layered protection segment is defined as a restricted participation layer. When both the fire-affected side segment boundary and the unaffected side segment boundary are density change interfaces, adhesion state change interfaces, or a combination of density change interfaces and adhesion state change interfaces, the layered protection segment is determined as the isolation participation layer.

[0008] A further technical improvement of the present invention is that the step of the thickness forming module obtaining multiple layered protective segments includes: The interlayer interface, density change interface, and adhesion state change interface of the gypsum-based fireproof coating are extracted along the fire-affected direction of the local prediction unit. Arrange the interfaces of each construction layer, the interface of density change, and the interface of adhesion change in the fire direction according to their positions. Then, merge adjacent interfaces that overlap or whose spacing is not greater than the preset interface merging spacing to determine the same segment interface. Using the fire-exposed surface, the unexposed surface, and the segment interface as the segment boundaries in the thickness direction, the thickness section between two adjacent segment boundaries is defined as a layered protection section.

[0009] A further technical improvement of the present invention is that the step of the thickness forming module incorporating the restricted participation layer includes: Determine the adjacent layered protection sections of each restricted participation layer along the fire-affected direction; when the adjacent layered protection sections on both sides of the restricted participation layer are continuous participation layers, the effective fire protection thickness is calculated according to the first proportion of the actual thickness of the restricted participation layer. When only one side of the adjacent layered protection sections on both sides of the restricted participation layer is a continuous participation layer, the effective fireproof thickness shall be calculated according to the second ratio, which is lower than the first ratio. When neither of the adjacent layered protection sections on either side of the restricted participation layer is a continuous participation layer, the actual thickness of the restricted participation layer is not included in the effective fire resistance thickness.

[0010] A further technical improvement of the present invention is that the step of the perturbation mapping module forming the interface-maintaining attenuation trajectory and the boundary-maintaining attenuation trajectory includes: Extract the direction, intensity, and location of action from the historical disturbance information of mechanical vibration, transportation impact, and load deformation; Based on the correspondence between the location of each disturbance information and the location of the segmented interface and boundary of the local prediction unit, the affected part of each disturbance information is determined. When the affected part corresponds to the segmented interface, the direction and intensity of the disturbance information are sequentially recorded into the interface to maintain the attenuation trajectory according to the order of disturbance occurrence. After each recording, the newly recorded disturbance information is accumulated with the existing disturbance information at the end of the trajectory to update the interface and maintain the attenuation trajectory state. When the affected part corresponds to the boundary, the direction and intensity of the disturbance information are sequentially included in the boundary maintenance attenuation trajectory according to the order of disturbance occurrence. After each inclusion, the newly included disturbance information is accumulated with the existing disturbance information at the end of the trajectory to update the boundary maintenance attenuation trajectory state. When the location of the same disturbance information corresponds to both the interlayer interface and the boundary, the disturbance information is included in the interface-preserving attenuation trajectory and the boundary-preserving attenuation trajectory respectively according to the above method, and the accumulation processing is performed to update the interface-preserving attenuation trajectory state and the boundary-preserving attenuation trajectory state respectively.

[0011] The steps by which the state formation module forms the current binding stability and the current wrapping stability include: Read the segment interfaces between multiple layered protection sections along the fire direction, and select the segment interface with the smallest distance from the fire-affected side surface as the surface interface, the segment interface with the smallest distance from the midpoint of the total thickness as the intermediate interface, and the segment interface with the smallest distance from the unfired side surface as the near-base interface. The interface attenuation trajectory is mapped to the surface interface, intermediate interface and near-base interface respectively. The trajectory position sequence corresponding to each interface is extracted. When the distance between adjacent trajectory positions is not greater than the preset trajectory connection distance, it is determined that there is no interruption position between adjacent trajectory positions. The current bonding stability is determined by the number of interfaces that are arranged adjacently along the fire direction and there is no interruption position between adjacent trajectory positions. The boundary-maintaining attenuation trajectory is mapped to the boundary region, and the trajectory position sequence corresponding to the boundary region is extracted. When the first trajectory position and the last trajectory position are connected sequentially through adjacent trajectory positions, and the distance between the last trajectory position and the first trajectory position is not greater than the preset trajectory connection distance, it is determined that the boundary region forms a closed trajectory position sequence. The current coverage stability is determined by the number of boundary regions that form a closed trajectory position sequence and whether each closed trajectory position sequence forms a loop along the boundary direction.

[0012] Compared with the prior art, the present invention has the following beneficial effects: This invention establishes a continuous unfolding path along the surface of the target component by setting up a unit generation module, identifying geometric change centers, connection structure centers, or coverage transition centers, and generating local prediction units accordingly. This transforms the fire performance prediction object from an overall or regular area into local prediction units constructed around complex and critical parts. As a result, it can better adapt to the actual protection characteristics of connection nodes, geometric change sites, and coverage change sites, improve the correspondence between the prediction object and the actual protection area, and provide a more stable foundation for subsequent thickness formation, disturbance mapping, and state formation. Furthermore, by setting a thickness forming module, the present invention decomposes the total thickness of the gypsum-based fire-retardant coating in the local prediction unit into multiple layered protection segments along the fire-exposed direction, and further distinguishes between continuous participation layers, limited participation layers, and isolated participation layers. This makes the effective fire-retardant thickness no longer simply equal to the total thickness or nominal thickness, but corresponds to the actual participation capacity of different layered protection segments during the fire-exposed process. As a result, the fire-retardant thickness forming process can better fit the layered protection characteristics of the gypsum-based fire-retardant coating, and improve the ability of subsequent fire-retardant performance prediction to reflect the effectiveness of local thickness. On the other hand, by setting up a disturbance mapping module, a state formation module, and a performance estimation module, this invention maps mechanical vibration, transportation impact, and load deformation into interface retention attenuation trajectories and boundary retention attenuation trajectories. Based on this, it forms the current bonding stability, the current coating stability, and the actual protection state, further identifying the heat breakthrough initiation surface and estimating the overall fire resistance performance. Thus, the disturbance effects after construction and during service can be incorporated into the fire resistance performance prediction chain, so that the prediction results not only reflect local thickness conditions but also reflect changes in the retention capacity of interfaces and boundaries, thereby improving the completeness and engineering applicability of the fire resistance performance prediction of gypsum-based fire-retardant coatings. Attached Figure Description

[0013] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings.

[0014] Figure 1 This is a system block diagram of the present invention. Detailed Implementation

[0015] To further illustrate the technical means and effects of the present invention in achieving its intended purpose, the following detailed description of the specific implementation methods, structures, features, and effects of the present invention, in conjunction with the accompanying drawings and preferred embodiments, is provided.

[0016] Please see Figure 1 As shown, the present invention provides a fire performance prediction system for gypsum-based fire-retardant coatings, comprising: The unit generation module is used to establish a continuous unfolding path along the continuous surface relationship between adjacent positions on the surface of the target component, identify the geometric change center, the connection structure center or the covering transition center, and take any one of the geometric change center, the connection structure center or the covering transition center as the starting position, and extend to the adjacent surface area continuously covered by gypsum-based fireproof coating around the starting position, until the continuous covering boundary, the connection structure transition or the geometric change termination point, to generate local prediction units. Specifically, a continuous unfolding path is established along the surface of the target component, and geometric change centers, connection structure centers, or covering transition centers are identified: In this embodiment, the surface contour information, connection structure distribution information, and gypsum-based fireproof coating coverage boundary information of the target component surface are first obtained. The surface contour information is used to characterize the contour extension relationship and boundary direction change relationship at various locations on the target component surface; the connection structure distribution information is used to characterize the distribution positions of welds, connection nodes, connection plates, and bolt connection areas on the target component surface; the coverage boundary information is used to characterize the coverage boundary, boundary termination position, and coverage direction change position of the gypsum-based fireproof coating on the target component surface. The above information can be obtained through target component surface contour measurement, reading of the surface model formed during construction, coverage boundary identification, or connection structure position calibration, as long as the continuous positional relationship, connection structure distribution relationship, and coverage boundary distribution relationship of the target component surface can be obtained.

[0017] After obtaining the above information, a continuous deployment path is established along the surface of the target component. In this embodiment, the continuous coverage area refers to the surface area formed by a gypsum-based fire-retardant coating continuously covering the surface of the target component and adjacent to and connected to the surface area where the starting position is located. Thus, the continuous coverage area is used to define the actual coverage range of the expansion action.

[0018] The method for establishing a continuous unfolding path is as follows: starting from any position on the surface of the target component, the subsequent adjacent positions are selected sequentially according to the adjacent extension relationship of the surface contour, so that the previous position and the next position maintain a continuous surface connection relationship, thereby forming a continuous path covering a local area of ​​the target component surface.

[0019] After establishing the continuous unfolding path, geometric abrupt change centers, connection structure centers, or covering transition centers are sequentially identified along the surface areas traversed by the continuous unfolding path. Geometric abrupt change centers are obtained by comparing the boundary transition angles of adjacent contour positions; when the boundary transition angles within a certain area are continuously higher than a preset transition angle, the position corresponding to the largest transition angle in that area is designated as the geometric abrupt change center. Connection structure centers are obtained by reading connection structure distribution information; when the spacing between connection structure distribution positions within a certain area is continuously no greater than a preset connection spacing, the position corresponding to the most concentrated distribution of connection structures in that area is designated as the connection structure center. Covering transition centers are obtained by reading covering boundary information; when the change in the direction of the covering boundary within a certain area is continuously higher than a preset boundary change angle, the position corresponding to the largest change in the direction of the covering boundary in that area is designated as the covering transition center. After identifying any one of the geometric abrupt change centers, connection structure centers, or covering transition centers, the process expands outwards from that center to adjacent surface areas continuously covered by a gypsum-based fire-retardant coating around the starting position.

[0020] Boundary termination determination is performed during the expansion process to generate local prediction units: Based on the previous step where the starting position was determined and expansion began towards the adjacent surface area continuously covered by the gypsum-based fire-retardant coating around the starting position, the positions of the continuous coverage boundaries, the distribution positions of the connecting structures, and the geometric abrupt change positions adjacent to the current expansion position are continuously collected along the current expansion direction formed by the expansion from the starting position to the adjacent surface area continuously covered by the gypsum-based fire-retardant coating around the starting position. In this embodiment, the current expansion direction refers to the surface extension direction from the previous expansion position to the next expansion position; the continuous coverage boundary position refers to the position point located on the continuous coverage boundary of the gypsum-based fire-retardant coating; the distribution position of the connecting structure refers to the position point of the connecting structure on the surface of the target component; and the geometric abrupt change position refers to the position point where the turning angle of the target component surface boundary is higher than a preset turning angle.

[0021] After continuously collecting data at the aforementioned locations, a termination determination is performed on the boundaries of the local prediction units. For continuous coverage boundary locations, when a boundary interruption occurs between adjacent continuous coverage boundary locations, it indicates that the continuous coverage relationship of the gypsum-based fireproof coating terminates at that location, and the interruption location is determined as the termination point of the continuous coverage boundary. In this embodiment, a boundary interruption means that there is no subsequent continuous coverage boundary location between two consecutive coverage boundary locations in the current expansion direction, or that the boundary spacing between two adjacent coverage boundary locations changes from no greater than a preset boundary spacing to greater than a preset boundary spacing. For connection structure distribution locations, when the spacing between adjacent connection structure distribution locations changes from no greater than a preset connection spacing to greater than a preset connection spacing, it indicates that the connection structure changes from a concentrated distribution area to a non-concentrated distribution area, and the location of this spacing change is determined as the connection structure transition point. For geometric abrupt change locations, when the boundary turning angle corresponding to adjacent geometric abrupt change locations changes from no less than a preset turning angle to less than a preset turning angle, it indicates that the geometric boundary changes from a region of obvious abrupt change to a region of gradual change, and the location of this turning angle change is determined as the termination point of the geometric abrupt change.

[0022] If any of the termination conditions—either at the end of a continuous envelope boundary, at a transitional point in a connecting structure, or at the end of a geometric abrupt change—is met first, the current expansion is stopped, and the corresponding location is determined as the boundary of a local prediction unit.

[0023] After the local prediction cells are generated, the overlapping areas between adjacent local prediction cells are processed: After generating multiple local prediction units in the previous step, it is determined whether there is a common region between adjacent local prediction units formed by expansion from different starting positions. Specifically, the boundary position sets of two adjacent local prediction units are read, and the regions enclosed by the two units are compared to see if there is an overlapping region. If the regions enclosed by the two units overlap, the overlapping region is identified as a common region. Further, if a common region exists, the common region is identified as an overlapping region.

[0024] After the overlapping region is determined, multiple sequentially arranged sampling positions are selected along the extension direction of the overlapping region. The extension direction of the overlapping region refers to the main extension direction of the overlapping region along its length; the sampling positions are arranged sequentially from one end of the overlapping region to the other according to this extension direction. Subsequently, the boundary tangents of the corresponding boundaries of two adjacent local prediction units are extracted at each sampling position. In this embodiment, the boundary tangent refers to the tangential extension direction of the boundary of the local prediction unit at the corresponding sampling position; since two adjacent local prediction units each have their own corresponding boundaries, two boundary tangents can be extracted at the same sampling position.

[0025] After extracting the two boundary tangents, the angle between the two boundary tangents at each sampling location is calculated as the cutting angle, thus forming a sequence of cutting angles arranged along the extension direction of the overlapping region. The cutting angle is used to characterize the convergence or separation relationship of the boundaries of two adjacent local prediction units within the overlapping region. If the cutting angle continuously decreases along the extension direction of the overlapping region, it indicates that the corresponding boundaries of the two adjacent local prediction units tend to converge within the overlapping region; if the cutting angle continuously increases along the extension direction of the overlapping region, it indicates that the corresponding boundaries of the two adjacent local prediction units tend to diverge within the overlapping region; if there are both decreasing and increasing segments of the cutting angle along the extension direction of the overlapping region, it indicates that the boundary relationship of the corresponding boundaries of the two adjacent local prediction units has changed within the overlapping region.

[0026] When the cutting angle sequence continuously decreases at a preset number of consecutive sampling positions, the overlapping region is merged into the local prediction unit where the endpoint of the continuously decreasing segment falls; when the cutting angle sequence continuously increases at a preset number of consecutive sampling positions, the position where the distance from the corresponding boundary of two adjacent local prediction units in the overlapping region is equal is determined as the boundary splitting position; when the cutting angle sequence has both continuously decreasing and continuously increasing segments in the overlapping region, the boundary position between the continuously decreasing and continuously increasing segments is determined as the boundary repositioning position, and the boundary of two adjacent local prediction units is redefined based on the boundary repositioning position.

[0027] Calculate the difference in cutting angles to determine whether the cutting angle sequence is continuously decreasing or continuously increasing: Based on the previously obtained cutting angle sequence, the cutting angle difference between adjacent sampling positions is calculated along the extension direction of the overlapping region. In this embodiment, the cutting angle difference is the difference between the cutting angle at the later sampling position and the cutting angle at the previous sampling position. By sequentially calculating the cutting angle difference between each adjacent sampling position within the overlapping region, a difference sequence corresponding to the cutting angle sequence can be obtained.

[0028] When multiple consecutive cut-in angle differences are all less than zero and the number of consecutive cut-in angle differences is not less than a preset number, the cut-in angle sequence is determined to continuously decrease at the preset number of consecutive sampling positions; when multiple consecutive cut-in angle differences are all greater than zero and the number of consecutive cut-in angle differences is not less than the preset number, the cut-in angle sequence is determined to continuously increase at the preset number of consecutive sampling positions. In this embodiment, the preset number is used to limit the minimum number of consecutive samples for continuous decrease or increase, thereby avoiding determining the overall trend of the cut-in angle sequence based solely on fluctuations at a single local sampling position. Therefore, the continuous decrease or increase of the cut-in angle sequence is no longer a subjective judgment, but is determined by both the sign and the number of consecutive cut-in angle differences.

[0029] Through the above steps, the unit generation action not only completes the generation of local prediction units, but also further completes the determination of the termination of local prediction unit boundaries, the processing of overlapping areas of adjacent local prediction units, and the determination of continuous reduction and continuous increase, so that the local prediction units have clear boundaries, clear attribution, and clear overlapping processing results, thus enabling them to serve as stable input objects for subsequent technical actions.

[0030] The thickness forming module is used to obtain the total thickness of the gypsum-based fireproof coating within the local prediction unit, decompose it into multiple layered protection sections along the fire direction, distinguish between continuous participation layer, restricted participation layer and isolated participation layer, and form an effective fireproof thickness based on the continuous participation layer and restricted participation layer. Specifically, the total thickness of the gypsum-based fire-retardant coating within the local prediction unit is obtained, and the thickness segmentation criteria are extracted in the fire-affected direction: In this embodiment, the previously determined local prediction unit is first used as the thickness analysis range to obtain the total thickness of the gypsum-based fireproof coating within the local prediction unit, from the fire-exposed surface to the unexposed surface. In this embodiment, the total thickness is the overall thickness of the gypsum-based fireproof coating actually existing within the local prediction unit. Subsequently, the interlayer interfaces, density variation interfaces, and adhesion state variation interfaces in the gypsum-based fireproof coating are extracted along the fire direction. The interlayer interfaces are used to characterize the interface positions between different construction layers, the density variation interfaces are used to characterize the positions where the density of the gypsum-based fireproof coating changes, and the adhesion state variation interfaces are used to characterize the positions where the adhesion state changes within the gypsum-based fireproof coating or between the gypsum-based fireproof coating and the target component. By simultaneously extracting the above three types of interfaces along the total thickness direction, the subsequent thickness segmentation no longer relies solely on the boundary of a single construction layer, but is based on the combined effects of the construction layer relationships, the internal density variation relationships, and the adhesion state variation relationships. This allows the thickness segmentation results to better reflect the actual structural characteristics of the gypsum-based fireproof coating in the fire direction.

[0031] Based on the above interface, multiple layered protection sections are formed: Based on the previously extracted interlayer interfaces, density variation interfaces, and adhesion state variation interfaces, these interfaces are arranged sequentially according to their position in the fire-exposed direction. When adjacent interfaces overlap or the distance between adjacent interfaces is not greater than the preset interface merging distance, the corresponding adjacent interfaces are merged and determined as the same segment interface. Subsequently, using the fire-exposed surface, the unexposed surface, and the aforementioned segment interfaces as the segment boundaries in the thickness direction, the thickness segment between two adjacent segment boundaries is determined as a layered protection segment. Through this process, each layered protection segment is defined by the boundaries in two adjacent thickness directions, thereby decomposing the total thickness of the gypsum-based fireproof coating within the local prediction unit into multiple consecutively arranged layered protection segments. In this embodiment, the layered protection segments are jointly defined by the interlayer interfaces, density variation interfaces, and adhesion state variation interfaces. Therefore, each layered protection segment has a clear boundary source and thickness direction position attribute, providing an objective basis for subsequent differentiation of continuous participation layers, restricted participation layers, and isolated participation layers.

[0032] Based on the interface types corresponding to the fire-facing and unfire-facing section boundaries of each layered protection section, the continuous participation layer, limited participation layer, and isolated participation layer are distinguished: After forming multiple layered protection sections in the previous step, the interface types corresponding to the fire-exposed and unexposed side boundaries of each layered protection section are sequentially read along the fire-exposed direction. When both the fire-exposed and unexposed side boundaries are construction layer interfaces, or when one side of the fire-exposed or unexposed side boundary is a fire-exposed or unexposed surface and the other side is a construction layer interface, it indicates that the layered protection section still maintains the continuous protection characteristics dominated by the construction layer relationship in the fire-exposed direction, and therefore the layered protection section is identified as a continuously participating layer; when one side of the fire-exposed or unexposed side boundary is a density change interface or an adhesion state change interface, and the other side is a construction layer interface, a fire-exposed surface, or an unexposed surface, the layered protection section is identified as a continuously participating layer. When the fire-side surface is exposed, it indicates that the layered protection section has been limited by a unilateral changing interface in the fire-facing direction, but it has not yet completely broken away from the continuous protection chain. Therefore, this layered protection section is identified as a restricted participation layer. When both the fire-facing side segment boundary and the unfire-facing side segment boundary are density changing interfaces, adhesion state changing interfaces, or a combination of density changing interfaces and adhesion state changing interfaces, it indicates that the layered protection section is limited by changing interfaces on both sides in the fire-facing direction, and its continuous protection chain has been significantly weakened. Therefore, this layered protection section is identified as an isolated participation layer.

[0033] The thickness is calculated based on the relationship between the restricted participation layer and adjacent layered protection sections, forming the effective fireproof thickness: After distinguishing between continuous participation layers, restricted participation layers, and isolated participation layers in the previous step, the adjacent protective sections of each restricted participation layer are determined along the fire-affected direction. When both adjacent protective sections on both sides of a restricted participation layer are continuous participation layers, it indicates that the restricted participation layer is still held by the continuous protective chain and can maintain a high degree of thermal insulation participation in the fire-affected direction. Therefore, the effective fire resistance thickness is calculated according to a first proportion of the actual thickness of the restricted participation layer. When only one side of the adjacent protective sections on both sides of a restricted participation layer is a continuous participation layer, it indicates that the restricted participation layer retains only one side of the continuous protective chain support, and its thermal insulation participation is weaker than in the aforementioned case. Therefore, the effective fire resistance thickness is calculated according to a second proportion lower than the first proportion. When neither adjacent protective section on both sides of a restricted participation layer is a continuous participation layer, it indicates that the restricted participation layer has detached from the continuous protective chain support and cannot serve as a stable and effective source of thermal insulation contribution. Therefore, the actual thickness of the restricted participation layer is not included in the effective fire resistance thickness. After the restricted participation layers are included, the actual thickness of all continuous participation layers is summed with the thickness of each restricted participation layer after being included proportionally, to form the effective fire resistance thickness of the corresponding local prediction unit. The resulting effective fire resistance thickness is no longer a direct equivalent of the total thickness, but is a thickness result based on the division of layered protection sections, the classification of three types of participation layers, and the differentiated inclusion of restricted participation layers. This allows for a more accurate reflection of the actual protective capability of the gypsum-based fire-retardant coating in the fire-exposed direction.

[0034] On the other hand, in this embodiment, the first ratio and the second ratio are used to determine the degree to which the restricted participation layer contributes to the effective fire resistance thickness. The first ratio corresponds to the case where both adjacent layered protective sections on both sides of the restricted participation layer are continuous participation layers. In this case, although there is a changing interface at the boundary of one or both segments of the restricted participation layer, it still maintains an adjacent clamping relationship with the continuous participation layer in the thickness direction, indicating that it still has a high continuous heat insulation participation capability during fire exposure. Therefore, it is included in the effective fire resistance thickness at a higher ratio. The second ratio corresponds to the case where only one side of the adjacent layered protective sections on both sides of the restricted participation layer is a continuous participation layer. In this case, the restricted participation layer only retains a single-sided continuous protective chain support in the thickness direction, and its heat insulation participation capability is lower than that of the aforementioned case where both sides are adjacent to continuous participation layers. Therefore, it is included in the effective fire resistance thickness at a second ratio lower than the first ratio. The specific values ​​of the first and second proportions are determined jointly based on the thickness retention of the gypsum-based fire-retardant coating during fire testing, the duration of localized insulation, and the engineering verification results. First, the thickness retention proportion is read when both adjacent layers of the restricted participation layer are continuous participation layers, and this proportion is used as the basis for the first proportion. Then, the thickness retention proportion is read when only one side of the adjacent layers of the restricted participation layer is a continuous participation layer, and this proportion is used as the basis for the second proportion. When the first and second proportions are determined in the above manner, the first proportion must be greater than the second proportion, and the second proportion must be greater than zero. When neither adjacent layer of the restricted participation layer is a continuous participation layer, it indicates that the restricted participation layer has broken away from the continuous protection chain and is no longer a source of stable insulation thickness; therefore, its actual thickness is not included in the effective fire-resistant thickness.

[0035] In this embodiment, the identification of interlayer interfaces, density variation interfaces, and adhesion state variation interfaces is also based on clear criteria. Interlayer interfaces are obtained by reading the layer boundaries formed by the multi-layer construction of the gypsum-based fireproof coating. Any interface corresponding to the junction of different construction layers in the fire-exposed direction is identified as an interlayer interface. Density variation interfaces are obtained by comparing the differences in material density between adjacent thickness sections. When there is a significant change in density between adjacent thickness sections, the corresponding location is identified as a density variation interface. Adhesion state variation interfaces are obtained by comparing whether the adhesion relationship between adjacent thickness sections changes. When the adhesion state changes between adjacent layers within the gypsum-based fireproof coating or between the gypsum-based fireproof coating and the target component, the corresponding location is identified as an adhesion state variation interface. The identification of the above three types of interfaces can be achieved based on construction layer records, material layer detection results, material state change information in the thickness direction, or adhesion state detection results. The core is not to limit specific detection equipment, but to be able to correspond the construction layer relationship, density change relationship, and adhesion state change relationship to a clear interface location in the fire direction, thereby providing an objective basis for the division of layered protection sections and the classification of the three types of participating layers.

[0036] Furthermore, in this embodiment, the layered protection section dominated by the interlayer interface is identified as a continuous participation layer because such a layered protection section still maintains a protection chain dominated by the continuous relationship of the construction layers in the fire-exposed direction; the layered protection section with a density change interface or an adhesion state change interface on one side is identified as a restricted participation layer because such a layered protection section only has a restricted protection relationship on one side, and it still retains some continuous heat insulation function; the layered protection section with density change interfaces, adhesion state change interfaces or combinations on both sides is identified as an isolated participation layer because such a layered protection section is restricted by the change interfaces on both sides in the thickness direction, making it difficult to maintain a stable and continuous heat insulation participation capability.

[0037] The disturbance mapping module is used to map mechanical vibration, transportation impact and load deformation to the segmented interface and boundary of the local prediction unit according to the direction, intensity and location of action, forming interface-preserving attenuation trajectory and boundary-preserving attenuation trajectory. Specifically, information on each disturbance is acquired, and a basic disturbance sequence that can be used for mapping is formed. In this embodiment, the previously generated local prediction unit is used as the disturbance mapping object, and information on each disturbance corresponding to mechanical vibration, transportation impact, and load deformation acting on the local prediction unit is read. Each disturbance information includes at least the direction of action, the intensity of action, and the location of action. The direction of action is used to characterize the force direction of the disturbance relative to the local prediction unit. It is acquired by reading the direction components of the disturbance relative to the surface of the local prediction unit in the normal and tangential directions, and converting them into a direction record that can be compared along the surface of the local prediction unit. The intensity of action is used to characterize the magnitude of the disturbance. It is acquired by reading any one or more of the displacement amplitude, velocity amplitude, acceleration amplitude, impact peak value, and load change corresponding to the disturbance. Then, the displacement amplitude is divided by a preset displacement reference value to obtain the displacement intensity component, the velocity amplitude is divided by a preset velocity reference value to obtain the velocity intensity component, and the acceleration amplitude is divided by a preset acceleration value. The acceleration intensity component is obtained from the reference value. The impact intensity component is obtained by dividing the peak impact value by the preset impact reference value, and the load intensity component is obtained by dividing the load change by the preset load reference value. Then, the obtained intensity components are weighted and summed according to preset weights to obtain the action intensity corresponding to the disturbance. When only some physical quantities are obtained for a disturbance, only the intensity components corresponding to the obtained physical quantities are weighted and summed, and the corresponding weights are normalized. The action position is used to characterize the landing point of the disturbance in the local prediction unit. The method of obtaining the action position is to project the actual action point of the disturbance onto the surface of the local prediction unit and read the surface position coordinates after projection. Then, the disturbance information is arranged in chronological order of the disturbance occurrence time to form a basic disturbance sequence. For example, the instantaneous impact formed during transportation and hoisting, the periodic vibration formed during long-term service, and the surface deformation formed during load changes can all be included in the same basic disturbance sequence according to the order of occurrence. However, this example is only used to illustrate the source of disturbance and does not replace the disclosure of the disturbance acquisition operation in this embodiment.

[0038] Based on the correspondence between the location of the disturbance and the segmented interface and boundary location, the affected portion of each disturbance is determined. Building upon the basic disturbance sequence formed in the previous step, the layered protection segments already formed within the local prediction unit and their corresponding segmented interface locations are read, along with the boundary location corresponding to the boundary of the local prediction unit. In this embodiment, the boundary location corresponds to the boundary of the local prediction unit formed in the aforementioned unit generation action, meaning it is a set of boundary locations continuously distributed along the boundary direction on the boundary of the local prediction unit. Subsequently, the location of each disturbance is correlated with the segmented interface location and the boundary location of the local prediction unit: when the shortest distance from the location of the disturbance to a certain segmented interface is not greater than the preset interface distance, the disturbance corresponds to the affected portion of the segmented interface; when the shortest distance from the location of the disturbance to a certain boundary location is not greater than the preset boundary distance, the disturbance corresponds to the affected portion of the boundary location; when the same location satisfies both of the above distance conditions, the disturbance corresponds to both the segmented interface and the boundary location. The method for determining the distance corresponding to the preset interface and the distance corresponding to the preset boundary is as follows: first, read the average distance between adjacent segment interfaces within the local prediction unit and the average distance between adjacent positions at the boundary, and then take their preset proportions as the corresponding judgment scales to ensure that the attribution judgment of the action position is consistent with the actual geometric scale of the local prediction unit.

[0039] The interface-maintained attenuation trajectory and the boundary-maintained attenuation trajectory are formed respectively, and the specific technical actions of the accumulation processing are disclosed. After the effective part corresponding to each disturbance information has been determined in the previous step, when the effective part corresponds to the segmented interface, the effective direction and intensity of the disturbance information are sequentially added to the interface-maintained attenuation trajectory according to the order of disturbance occurrence; when the effective part corresponds to the boundary part, the effective direction and intensity of the disturbance information are sequentially added to the boundary-maintained attenuation trajectory according to the order of disturbance occurrence. In this embodiment, "added" means appending the current disturbance information to the end of the corresponding trajectory to form a new trajectory position point. Then, "accumulation processing" is performed: for the effective direction, the direction record of the existing disturbance information at the end of the trajectory is read, and the direction record of the newly added disturbance information is appended to the existing direction record at the end in the order of occurrence to form an updated direction sequence; for the effective intensity, the intensity value of the existing disturbance information at the end of the trajectory is read, and the intensity value of the newly added disturbance information is sequentially accumulated with the existing intensity value at the end to form an updated accumulated intensity value; the updated direction sequence and the accumulated intensity value are written together to the end of the corresponding trajectory to update the state of the interface-maintained attenuation trajectory or the state of the boundary-maintained attenuation trajectory respectively. When the same disturbance information corresponds to both the segment interface and the boundary, the disturbance information is included in the interface-preserving attenuation trajectory and the boundary-preserving attenuation trajectory respectively, and then superimposed in direction order and accumulated in intensity order, respectively. This ensures that the same disturbance can participate in the formation of both types of trajectories simultaneously, while the two types of trajectories remain independent of each other. For example, when a transportation shock acts near both the segment interface and the boundary of a local prediction unit, the transportation shock enters both the interface-preserving attenuation trajectory and the boundary-preserving attenuation trajectory, but the additional position and accumulated intensity in the two trajectories are calculated independently.

[0040] Both types of decay trajectories are used as unified input objects for subsequent state formation actions. After completing the aforementioned steps, interface-preserving decay trajectories and boundary-preserving decay trajectories formed in the order of disturbance occurrence are obtained. The interface-preserving decay trajectory reflects the decay process of the ability to preserve the segmented interface within the local prediction unit under each disturbance, while the boundary-preserving decay trajectory reflects the decay process of the ability to preserve the boundary portion within the local prediction unit under each disturbance. In this embodiment, the two types of trajectories are not independent endpoints, but rather serve as direct input objects for subsequently forming the current binding stability and the current enveloping stability.

[0041] In this embodiment, the displacement amplitude, velocity amplitude, acceleration amplitude, peak impact value, and load change corresponding to each disturbance information are read respectively. Then, the displacement amplitude is divided by a preset displacement reference value to form a displacement intensity component, the velocity amplitude is divided by a preset velocity reference value to form a velocity intensity component, the acceleration amplitude is divided by a preset acceleration reference value to form an acceleration intensity component, the peak impact value is divided by a preset impact reference value to form an impact intensity component, and the load change is divided by a preset load reference value to form a load intensity component. Subsequently, the displacement intensity component, velocity intensity component, acceleration intensity component, impact intensity component, and load intensity component are weighted and summed according to preset weights to obtain the effect intensity of the disturbance information.

[0042] Specifically, the formula is: ; In the formula, I represents the intensity of the action; D is the displacement amplitude. The preset displacement reference value; V is the velocity amplitude. The preset speed reference value; A is the acceleration amplitude. The preset acceleration reference value; P represents the peak impact value. The preset impact reference value; L is the change in load. The preset load reference value; to For the corresponding weights, and .

[0043] Furthermore, when only a portion of the physical quantities—displacement amplitude, velocity amplitude, acceleration amplitude, peak impact value, and load change—are obtained for a given disturbance, the intensity component corresponding to the obtained physical quantities is normalized, and the corresponding weights are then subjected to residual normalization to form the intensity of the disturbance. That is: ; S is the set of physical quantities actually obtained from this disturbance information; The weights are the weights after renormalization of the weights within the set of physical quantities S; This is the kth acquired physical quantity; This corresponds to the baseline value.

[0044] The preset displacement reference values, preset velocity reference values, preset acceleration reference values, preset impact reference values, and preset load reference values ​​are preset based on the structural type of the target component, the boundary scale of the local prediction unit, the thickness range of the gypsum-based fireproof coating, and the construction, transportation, and service conditions. The state formation module is used to determine the current bonding stability and the current coverage stability based on the effective fireproof thickness, the interface retention attenuation trajectory, and the boundary retention attenuation trajectory, and to form the actual protection state. Specifically, based on the effective fireproof thickness and the interface base objects of the layered protection sections, the corresponding relationship of the state-formed interfaces is established. In this embodiment, the previously formed effective fireproof thickness is used as the basis for the effective heat insulation thickness of the current local area in the fire-affected direction. At the same time, multiple layered protection sections arranged along the fire-affected direction and the segment interfaces between the multiple layered protection sections are read. In this embodiment, the segment interfaces are directly derived from the segment boundaries already determined in the aforementioned thickness formation action, without introducing new interface objects. Subsequently, among the multiple segment interfaces, the segment interface with the smallest distance to the fire-affected side surface is selected as the surface interface, the segment interface with the smallest distance to the midpoint of the total thickness is selected as the intermediate interface, and the segment interface with the smallest distance to the unfired side surface is selected as the near-base interface. The determination of the smallest distance to the fire-affected side surface, the smallest distance to the midpoint of the total thickness, and the smallest distance to the unfired side surface are all completed by comparing the thickness direction distances. That is, the thickness direction distances from each segment interface to the fire-affected side surface, the midpoint of the total thickness, and the unfired side surface are calculated respectively, and the corresponding smallest distance is selected.

[0045] The interface-maintaining attenuation trajectory is mapped to the surface interface, intermediate interface, and near-base interface to form the current bonding stability. Based on the surface interface, intermediate interface, and near-base interface already obtained in the previous step, the interface-maintaining attenuation trajectory is mapped to each of these interfaces, and the corresponding trajectory position sequence is extracted on each interface. In this embodiment, the trajectory position sequence refers to the continuous position record of the interface-maintaining attenuation trajectory on the corresponding interface. It is obtained by reading each trajectory position corresponding to the interface position in the interface-maintaining attenuation trajectory and sorting them according to their adjacency in the fire direction. Subsequently, the spacing between the sorted adjacent trajectory positions is calculated. When the spacing between adjacent trajectory positions is not greater than the preset trajectory connection spacing, it is determined that there is no interruption between adjacent trajectory positions; when the spacing between adjacent trajectory positions is greater than the preset trajectory connection spacing, it is determined that there is an interruption between adjacent trajectory positions. The preset trajectory connection spacing is determined by first reading the average position spacing of adjacent trajectory positions on the corresponding interface, and then taking a value according to a preset ratio to form a trajectory continuity judgment scale. Furthermore, when there are three interfaces among the surface interface, intermediate interface, and near-base interface that are adjacent to each other along the fire direction and have no interruption between adjacent trajectory positions, the current bonding stability is determined to be in a high bonding state; when there are two such interfaces, the current bonding stability is determined to be in an intermediate bonding state; when there are one or zero such interfaces, the current bonding stability is determined to be in a low bonding state.

[0046] The boundary-preserving attenuation trajectory is mapped to the boundary region, forming the current envelope stability. Based on the current combined stability already formed in the previous step, the boundary-preserving attenuation trajectory is mapped to the boundary region, and the trajectory position sequence corresponding to the boundary region is extracted. In this embodiment, the boundary region remains consistent with the boundary region in the aforementioned perturbation mapping action, and is a set of positions continuously distributed along the boundary direction on the boundary of the local prediction unit. For the extracted trajectory position sequence, it is first arranged according to the order of the boundary direction, and then it is determined whether the first trajectory position and the last trajectory position are sequentially connected through adjacent trajectory positions; if the first trajectory position and the last trajectory position are sequentially connected through adjacent trajectory positions, and the distance between the last trajectory position and the first trajectory position is not greater than the preset trajectory connection distance, then it is determined that the boundary region forms a closed trajectory position sequence. Furthermore, when all boundary locations form closed trajectory position sequences and each closed trajectory position sequence forms a loop along the boundary direction, the current envelopment stability is determined to be in a high envelopment state; when only some boundary locations form closed trajectory position sequences and each closed trajectory position sequence does not form a complete loop along the boundary direction, the current envelopment stability is determined to be in an intermediate envelopment state; when no closed trajectory position sequence is formed at the boundary locations, the current envelopment stability is determined to be in a low envelopment state.

[0047] The actual protection state is formed based on the current bonding stability and the current coverage stability. Building upon the previous step where the current bonding stability and current coverage stability were separately determined, the actual protection state is further formed based on their combination relationship. Specifically, if the current bonding stability is in a high bonding state and the current coverage stability is in a high coverage state, the actual protection state is determined to be a high protection state; if at least one of the current bonding stability and the current coverage stability is in an intermediate state, and neither is in a low state, the actual protection state is determined to be a medium protection state; if at least one of the current bonding stability or the current coverage stability is in a low state, the actual protection state is determined to be a low protection state. This formed actual protection state inherits both the thickness effectiveness of the effective fireproof thickness and the retention attenuation relationship reflected by the interface retention attenuation trajectory and the boundary retention attenuation trajectory. This unifies the continuous retention capability in the thickness direction and the coverage retention capability in the boundary direction into a single protection result object, serving as the input basis for subsequent performance estimation actions.

[0048] The performance estimation module is used to identify the fire-exposed surface segment that first loses continuous protection capability based on the actual protection status. When the fire-exposed surface segment meets the penetration weakness condition, it determines the heat breakthrough initiation surface and estimates the overall fire resistance performance of the target component based on the effective fireproof thickness corresponding to the heat breakthrough initiation surface, the actual protection status, and the penetration weakness condition.

[0049] Specifically, fire-affected positions are arranged along the fire-affected side surface of the local prediction unit, forming a sequence of fire-affected positions.

[0050] In this embodiment, the aforementioned local prediction unit is used as the performance estimation object, and multiple sequentially arranged fire-affected positions are arranged along the fire-affected side surface of the local prediction unit. The arrangement of the fire-affected positions is as follows: adjacent surface position points are selected sequentially along the extension direction of the fire-affected side surface at a preset surface sampling interval, such that the surface distance between two adjacent fire-affected positions is not greater than the preset surface sampling interval, thereby forming a sequence of fire-affected positions continuously arranged along the fire-affected side surface. Each fire-affected position corresponds one-to-one with its effective fireproof thickness in the corresponding thickness direction, current bonding stability, current coverage stability, and actual protection status.

[0051] Identify the fire-exposed segment that first loses continuous protection capability based on the actual protection status: Based on the fire-affected location sequence established in the previous step, the actual protection status corresponding to each fire-affected location is read sequentially, and the actual protection status levels between adjacent fire-affected locations are compared. When the actual protection status of a later fire-affected location is lower than that of a previous fire-affected location, it is determined that there is a decrease in the actual protection status between adjacent fire-affected locations. When the above-mentioned decrease in actual protection status exists between multiple consecutive adjacent fire-affected locations, and the number of consecutively decreasing fire-affected locations is not less than the preset number of segments, the corresponding fire-affected location segment is determined as a fire-affected surface segment. After obtaining one or more fire-affected surface segments, the order of decrease in the actual protection status within each fire-affected surface segment is further compared. When a fire-affected location within a fire-affected surface segment first decreases to the preset failure state, the fire-affected surface segment containing that fire-affected location is determined as the fire-affected surface segment that first loses continuous protection capability.

[0052] When the segment exposed to fire meets the condition of weak penetration, the heat breakthrough at the initiation surface is determined: After identifying the fire-exposed surface segment that first loses its continuous protection capability in the previous step, the arrangement order of the continuous participation layer, restricted participation layer, and isolation participation layer is read along the total thickness direction corresponding to the fire-exposed surface segment. The included thickness of the corresponding restricted participation layer and the continuity of the continuous participation layer arrangement are also read. If an isolation participation layer exists in the total thickness direction, it is determined that the continuous protection chain in that direction is broken. If no isolation participation layer exists, but the included thickness of the restricted participation layer is lower than a preset thickness threshold, it is determined that the effective thickness contribution in that direction is insufficient. If the arrangement of the continuous participation layers in the fire-exposed direction is interrupted, it is determined that a continuous insulating chain cannot be formed in that direction. When any of the above three situations is met, the fire-exposed surface segment is determined to meet the penetration weakness condition. When the fire-exposed surface segment meets the penetration weakness condition, the fire-exposed surface segment is determined to be the heat breakthrough initiation surface.

[0053] The overall fire resistance of the target component can be estimated based on the heat penetration initiation surface: After determining the heat breakthrough initiation surface in the previous step, the effective fireproof thickness, current bonding stability, current coverage stability, actual protection status, and penetration weakness condition corresponding to the heat breakthrough initiation surface are read and used as local inputs for estimating the overall fire resistance performance of the target component. Subsequently, the overall fire resistance performance of the target component is estimated in the following manner: when the effective fireproof thickness corresponding to the heat breakthrough initiation surface is lower than the preset thickness judgment value, the actual protection status is low protection status, and the penetration weakness condition is met, the overall fire resistance performance of the target component is determined to be low protection performance; when the heat breakthrough initiation surface has been formed, but the corresponding effective fireproof thickness is higher than the preset thickness judgment value, and the actual protection status is medium protection status, the overall fire resistance performance of the target component is determined to be medium protection performance; when no heat breakthrough initiation surface has been formed, or although there is a fire-exposed surface segment, the penetration weakness condition is not met, the overall fire resistance performance of the target component is determined to be high protection performance. The heat breakthrough initiation surface is used as the starting basis for performance estimation to maintain logical consistency with the aforementioned local prediction unit, effective fireproof thickness, actual protection status, and penetration weakness condition.

[0054] On the other hand, in this embodiment, the preset connection spacing is used to determine whether the distribution of connection structures changes from a concentrated state to a non-concentrated state. It is determined based on the average spacing of adjacent connection structure distribution positions on the surface of the target component, and a preset ratio of the average spacing is taken as the connection structure transition judgment scale. The preset turning angle is used to determine whether the geometric boundary changes from a significant abrupt state to a gradual change state. It is determined based on the boundary turning angle distribution of adjacent contour positions on the surface of the target component, and a preset angle value in the statistical results of the boundary turning angle on the surface of the target component is taken as the geometric abrupt termination judgment scale. The preset number of segments is used to limit the minimum number of continuous fire-exposed positions of the fire-exposed surface segments. It is determined based on the boundary length of the fire-exposed side surface of the local prediction unit and the spacing of the fire-exposed positions to ensure that the identified fire-exposed surface segments have a minimum continuous surface range. The preset thickness threshold is used to determine whether the included thickness of the restricted participation layer is still sufficient to maintain the effective heat insulation contribution. It is determined based on the lower limit of the effective fireproof thickness formed by the continuous participation layer in the local prediction unit and the minimum heat insulation continuous thickness in the fire test.

[0055] The above formulas are all dimensionless calculations. The formulas are derived from software simulations based on a large amount of collected data to obtain the most recent real-world results. The preset parameters and thresholds in the formulas are set by those skilled in the art according to the actual situation.

[0056] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A system for predicting fire resistance performance of a gypsum-based fire resistant coating, characterized by, include: The unit generation module is used to establish a continuous unfolding path along the continuous surface relationship between adjacent positions on the surface of the target component, identify the geometric change center, the connection structure center or the covering transition center, and take any one of the geometric change center, the connection structure center or the covering transition center as the starting position, and extend to the adjacent surface area continuously covered by gypsum-based fireproof coating around the starting position, until the continuous covering boundary, the connection structure transition or the geometric change termination point, to generate local prediction units. The thickness forming module is used to obtain the total thickness of the gypsum-based fireproof coating within the local prediction unit, decompose it into multiple layered protection sections along the fire direction, distinguish between continuous participation layer, restricted participation layer and isolated participation layer, and form an effective fireproof thickness based on the continuous participation layer and restricted participation layer. The disturbance mapping module is used to map mechanical vibration, transportation impact and load deformation to the segmented interface and boundary of the local prediction unit according to the direction, intensity and location of action, forming interface-preserving attenuation trajectory and boundary-preserving attenuation trajectory. The state formation module is used to determine the current bonding stability and the current coverage stability based on the effective fireproof thickness, the interface retention attenuation trajectory, and the boundary retention attenuation trajectory, and to form the actual protection state. The performance estimation module is used to identify the fire-exposed surface segment that first loses continuous protection capability based on the actual protection status. When the fire-exposed surface segment meets the condition of weak penetration, it determines the heat breakthrough initiation surface and estimates the overall fire resistance performance of the target component based on the heat breakthrough initiation surface.

2. The system for predicting fire resistance performance of a gypsum-based fire resistant coating according to claim 1, wherein The boundary termination determination step for generating local prediction units in the unit generation module includes: Along the current expansion direction, which extends from the starting position to the adjacent surface area continuously covered by the gypsum-based fireproof coating around the starting position, continuously collect the positions of the continuous coverage boundaries, the distribution of the connection structure, and the geometric abrupt change positions adjacent to the current expansion position; When a boundary interruption occurs between adjacent continuous enclosing boundary positions, the interruption position is determined as the termination point of the continuous enclosing boundary. When the spacing between adjacent connection structures changes from no more than the preset connection spacing to more than the preset connection spacing, the location of this spacing change is determined as the transition point of the connection structure. When the boundary turning angle corresponding to an adjacent geometric change position changes from not less than a preset turning angle to less than a preset turning angle, the position of the change in turning angle is determined as the end of the geometric change. When any of the termination conditions—either at the continuous envelope boundary termination, the connection structure transition, or the geometric abrupt termination—are met first, the current expansion stops, and the corresponding location is determined as the boundary of the local prediction unit.

3. The system for predicting fire resistance performance of a gypsum-based fire resistant coating according to claim 2, wherein After generating local prediction units, the unit generation module includes: Determine whether there is a common region between adjacent local prediction units formed by expansion from different starting positions; When a public area exists, the public area is defined as an overlapping area; Multiple sequentially arranged sampling positions are selected along the extension direction of the overlapping region, and the boundary tangents of the corresponding boundaries of two adjacent local prediction units are extracted at each sampling position. Calculate the angle between the two boundary tangents at each sampling location as the cutting angle, forming a sequence of cutting angles arranged along the extension direction of the overlapping region; When the cutting angle sequence continues to decrease at a preset number of consecutive sampling positions, the overlapping area is incorporated into the local prediction unit where the end point of the continuously decreasing segment falls. When the cutting angle sequence continues to increase at a preset number of consecutive sampling positions, the position where the distance to the corresponding boundary of two adjacent local prediction units in the overlapping area is equal is determined as the boundary cutting position; When the cutting angle sequence contains both continuously decreasing segments and continuously increasing segments in the overlapping region, the boundary position between the continuously decreasing segments and the continuously increasing segments is determined as the boundary repositioning position, and the boundary of the two adjacent local prediction units is re-determined based on the boundary repositioning position.

4. The system for predicting fire resistance performance of a gypsum-based fire resistant coating according to claim 3, wherein Calculate the difference in cutting angle between adjacent sampling positions along the extension direction of the overlapping region; When multiple consecutive cut-in angle differences are all less than zero and the number of consecutive cut-in angle differences is not less than a preset number, the cut-in angle sequence is determined to continuously decrease at a preset number of consecutive sampling positions. When multiple consecutive cut-in angle differences are all greater than zero and the number of consecutive cut-in angle differences is not less than a preset number, the cut-in angle sequence is determined to continuously increase at a preset number of consecutive sampling positions.

5. The system for predicting fire resistance performance of a gypsum-based fire resistant coating according to claim 1, wherein The thickness formation module distinguishes between continuous participation layers, restricted participation layers, and isolated participation layers, including: Read the interface type corresponding to the fire-affected side segment boundary and the unaffected side segment boundary of each layer of protection section in sequence along the fire direction; When both the fire-side segment boundary and the unfire-side segment boundary are construction interlayer interfaces, or when one side of the fire-side segment boundary and the unfire-side segment boundary is the fire-side surface or the unfire-side surface and the other side is the construction interlayer interface, the layered protection segment is defined as a continuous participation layer. When one side of the fire-exposed segment boundary and the unexposed segment boundary is a density change interface or an adhesion state change interface, and the other side is a construction layer interface, a fire-exposed surface, or an unexposed surface, the layered protection segment is defined as a restricted participation layer. When both the fire-affected side segment boundary and the unaffected side segment boundary are density change interfaces, adhesion state change interfaces, or a combination of density change interfaces and adhesion state change interfaces, the layered protection segment is determined as the isolation participation layer.

6. The system for predicting fire resistance performance of a gypsum-based fire resistant coating according to claim 5, wherein The steps for the thickness forming module to obtain multiple layered protection sections include: The interlayer interface, density change interface, and adhesion state change interface of the gypsum-based fireproof coating are extracted along the fire-affected direction of the local prediction unit. Arrange the interfaces of each construction layer, the interface of density change, and the interface of adhesion change in the fire direction according to their positions. Then, merge adjacent interfaces that overlap or whose spacing is not greater than the preset interface merging spacing to determine the same segment interface. Using the fire-exposed surface, the unexposed surface, and the segment interface as the segment boundaries in the thickness direction, the thickness section between two adjacent segment boundaries is defined as a layered protection section.

7. The system for predicting fire resistance performance of a gypsum-based fire resistant coating according to claim 6, wherein The steps for the thickness forming module to include the inclusion of the restricted participation layer include: Determine the adjacent layered protection sections of each restricted participation layer along the fire-affected direction; when the adjacent layered protection sections on both sides of the restricted participation layer are continuous participation layers, the effective fire protection thickness is calculated according to the first proportion of the actual thickness of the restricted participation layer. When only one side of the adjacent layered protection sections on both sides of the restricted participation layer is a continuous participation layer, the effective fireproof thickness shall be calculated according to the second ratio, which is lower than the first ratio. When neither of the adjacent layered protection sections on either side of the restricted participation layer is a continuous participation layer, the actual thickness of the restricted participation layer is not included in the effective fire resistance thickness.

8. The system for predicting fire resistance performance of a gypsum-based fire resistant coating according to claim 1, wherein The steps of the perturbation mapping module in forming the interface-preserving decay trajectory and the boundary-preserving decay trajectory include: Extract the direction, intensity, and location of action from the historical disturbance information of mechanical vibration, transportation impact, and load deformation; Based on the correspondence between the location of each disturbance information and the location of the segmented interface and boundary of the local prediction unit, the affected part of each disturbance information is determined. When the affected part corresponds to the segmented interface, the direction and intensity of the disturbance information are sequentially recorded into the interface to maintain the attenuation trajectory according to the order of disturbance occurrence. After each recording, the newly recorded disturbance information is accumulated with the existing disturbance information at the end of the trajectory to update the interface and maintain the attenuation trajectory state. When the affected part corresponds to the boundary, the direction and intensity of the disturbance information are sequentially included in the boundary maintenance attenuation trajectory according to the order of disturbance occurrence. After each inclusion, the newly included disturbance information is accumulated with the existing disturbance information at the end of the trajectory to update the boundary maintenance attenuation trajectory state. When the location of the same disturbance information corresponds to both the segment interface and the boundary, the direction and intensity of the disturbance information are recorded in the interface-maintaining attenuation trajectory and the boundary-maintaining attenuation trajectory respectively according to the order of the disturbance occurrence. After each is recorded, the newly recorded disturbance information is accumulated with the existing disturbance information at the end of the corresponding trajectory to update the state of the interface-maintaining attenuation trajectory and the boundary-maintaining attenuation trajectory.

9. The fire resistance performance prediction system for gypsum-based fire-retardant coatings according to claim 1, characterized in that, The steps by which the state formation module forms the current binding stability and the current wrapping stability include: Read the segment interfaces between multiple layered protection sections along the fire direction, and select the segment interface with the smallest distance from the fire-affected side surface as the surface interface, the segment interface with the smallest distance from the midpoint of the total thickness as the intermediate interface, and the segment interface with the smallest distance from the unfired side surface as the near-base interface. The interface attenuation trajectory is mapped to the surface interface, intermediate interface and near-base interface respectively. The trajectory position sequence corresponding to each interface is extracted. When the distance between adjacent trajectory positions is not greater than the preset trajectory connection distance, it is determined that there is no interruption position between adjacent trajectory positions. The current bonding stability is determined by the number of interfaces that are arranged adjacently along the fire direction and there is no interruption position between adjacent trajectory positions. The boundary-maintaining attenuation trajectory is mapped to the boundary region, and the trajectory position sequence corresponding to the boundary region is extracted. When the first trajectory position and the last trajectory position are connected sequentially through adjacent trajectory positions, and the distance between the last trajectory position and the first trajectory position is not greater than the preset trajectory connection distance, it is determined that the boundary region forms a closed trajectory position sequence. The current coverage stability is determined by the number of boundary regions that form a closed trajectory position sequence and whether each closed trajectory position sequence forms a loop along the boundary direction.

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