Fabricated building structure health monitoring system and method

Abstract

According to the fabricated building structure health monitoring system and method provided by the invention, first dynamic detection is performed on all assembly connection areas in a fabricated building to obtain first action dynamic data, so that assembly connection stress distribution state information in the fabricated building is determined; stress generated by assembly and connection of different structural parts is comprehensively identified; and based on the assembly connection stress distribution state information, identifying an abnormal assembly connection area, detecting and analyzing second action dynamic data of the abnormal assembly connection area to obtain relative position change information among different structural members in the abnormal assembly connection area, accurately identifying the relative movement condition of the structural members, and improving the accuracy of the relative movement condition of the structural members. A reliable basis is provided for subsequently judging whether the structural member has a loosening risk or not; and according to the existence state information of all the structural members with the loosening risk in the fabricated building, performing structural health judgment and early warning prompt on the fabricated building, timely and comprehensively performing dynamic troubleshooting on the structural members in the fabricated building, and realizing accurate monitoring and timely early warning on the structural health degree of the fabricated building.

Description

Technical Field

[0001] The present invention relates to the field of building monitoring, and in particular to a prefabricated building structure health monitoring system and method. Background Art

[0002] In recent years, prefabricated buildings have gradually become the main building structure due to their easy assembly and low construction cost. Prefabricated buildings assemble prefabricated parts during the construction process to build a complete and stable structure. This not only saves construction space, but also prefabricated parts of different shapes can be prefabricated to meet the needs of different construction scenarios, thereby improving construction efficiency. The main components inside prefabricated buildings are prefabricated parts, and different prefabricated parts are assembled and connected in a corresponding manner. After the different prefabricated parts are assembled and connected, under the combined influence of the interaction between the different prefabricated parts and the external effects, the prefabricated parts and other parts inside the prefabricated building are prone to loosening or dislocation, which has a negative impact on the structural health and stability of the prefabricated building, and it is impossible to ensure the structural safety of the prefabricated building and conduct timely safety monitoring and early warning. Summary of the invention

[0003] The purpose of the present invention is to provide a prefabricated building structural health monitoring system and method, which performs a first dynamic detection on all assembly connection areas inside the prefabricated building to obtain first action dynamic data, thereby determining the assembly connection stress distribution state information inside the prefabricated building, and comprehensively identifying the stress generated by the assembly connection of different structural parts; based on the assembly connection stress distribution state information, it identifies abnormal assembly connection areas, detects and analyzes second action dynamic data of the abnormal assembly connection areas, obtains relative position change information between different structural parts inside the abnormal assembly connection areas, accurately identifies the relative movement of the structural parts, and provides a reliable basis for subsequent judgment of whether there is a risk of loosening of the structural parts; and then, based on the existence state information of all structural parts that are at risk of loosening inside the prefabricated building, makes structural health judgments and early warnings for the prefabricated building, timely and comprehensively performs dynamic inspections on the structural parts inside the prefabricated building, and accurately monitors and promptly warns the structural health of the prefabricated building.

[0004] The present invention is achieved through the following technical solutions:

[0005] An assembled building structure health monitoring system, comprising:

[0006] A first dynamic detection module is used to perform a first dynamic detection on all assembly connection areas inside the prefabricated building to obtain first motion dynamic data corresponding to the assembly connection areas;

[0007] A stress distribution identification module, used to analyze the first action dynamic data to obtain assembly connection stress distribution state information inside the prefabricated building;

[0008] An abnormal assembly connection area identification module is used to identify the abnormal assembly connection area inside the prefabricated building based on the assembly connection stress distribution state information;

[0009] A second dynamic detection and analysis module is used to perform a second dynamic detection on the abnormal assembly connection area to obtain second action dynamic data corresponding to the abnormal assembly connection area; analyze the second action dynamic data to obtain relative position change information between different structural parts inside the abnormal assembly connection area;

[0010] A structural component identification module, used for identifying structural components with a risk of loosening inside the prefabricated building based on the relative position change information;

[0011] The health judgment and early warning module is used to judge the structural health of the prefabricated building and provide early warning prompts based on the existence status information of all structural parts with loosening risks inside the prefabricated building.

[0012] Optionally, the first dynamic detection module is used to perform a first dynamic detection on all assembly connection areas inside the prefabricated building to obtain first motion dynamic data corresponding to the assembly connection areas, including:

[0013] Acquire the extension orientation information of all assembly connection areas inside the prefabricated building, and based on the extension orientation information, perform global deformation dynamic detection on the assembly connection areas to obtain deformation stress action data corresponding to the assembly connection areas; wherein the deformation stress action data includes the magnitude and direction of the deformation action force;

[0014] The stress distribution identification module is used to analyze the first action dynamic data to obtain assembly connection stress distribution state information inside the prefabricated building, including:

[0015] Based on the distribution positions of all assembly connection areas inside the prefabricated building, the deformation stress action data corresponding to all assembly connection areas are fitted and sorted to obtain the assembly connection stress distribution state information inside the prefabricated building; wherein the assembly connection stress distribution state information includes the action value and action direction information of the assembly connection stress.

[0016] Optionally, the abnormal assembly connection area identification module is used to identify the abnormal assembly connection area inside the prefabricated building based on the assembly connection stress distribution state information, including:

[0017] Based on the assembly connection stress distribution state information and the assembly contact surface orientation information of all assembly connection areas, determine the stress action values ​​and action directions of all assembly contact surfaces under the assembly connection area; based on the stress action values ​​and action directions, judge whether the assembly connection area is in a stress balance state; if so, determine the assembly connection area as a normal assembly connection area; if not, determine the assembly connection area as an abnormal assembly connection area;

[0018] The second dynamic detection and analysis module is used to perform a second dynamic detection on the abnormal assembly connection area to obtain second motion dynamic data corresponding to the abnormal assembly connection area; analyze the second motion dynamic data to obtain relative position change information between different structural parts inside the abnormal assembly connection area, including:

[0019] The movement motion of all structural parts under the abnormal assembly connection area is detected to obtain the movement amplitude and movement direction data of all structural parts; the movement amplitude and movement direction data of all structural parts are analyzed to obtain the relative displacement change trend information between any two structural parts in contact with each other among all structural parts under the abnormal assembly connection area.

[0020] Optionally, the structural component identification module is used to identify structural components with a risk of loosening inside the prefabricated building based on the relative position change information, including:

[0021] Based on the relative displacement change trend information, determine whether the contact area between the two structural members in contact with each other gradually decreases; if so, determine that the corresponding two structural members have a risk of loosening; otherwise, determine that the corresponding two structural members do not have a risk of loosening;

[0022] The health judgment and early warning module is used to judge the structural health of the prefabricated building and provide early warning prompts based on the existence status information of all structural parts with loosening risks inside the prefabricated building, including:

[0023] Obtain distribution position information of all structural parts with a risk of loosening inside the prefabricated building, and based on the distribution position information, identify distribution information of structurally unstable areas inside the prefabricated building; then, based on the distribution information of structurally unstable areas, determine the part inside the prefabricated building that is most likely to collapse first, and issue an early warning based on the position information of the part that is most likely to collapse first.

[0024] A method for health monitoring of assembled building structures, comprising:

[0025] Performing a first dynamic detection on all assembly connection areas inside the prefabricated building to obtain first motion dynamic data corresponding to the assembly connection areas; analyzing the first motion dynamic data to obtain assembly connection stress distribution state information inside the prefabricated building;

[0026] Based on the assembly connection stress distribution state information, an abnormal assembly connection area inside the prefabricated building is identified; a second dynamic detection is performed on the abnormal assembly connection area to obtain second motion dynamic data corresponding to the abnormal assembly connection area; the second motion dynamic data is analyzed to obtain relative position change information between different structural parts inside the abnormal assembly connection area;

[0027] Based on the relative position change information, structural components at risk of loosening inside the prefabricated building are identified; based on the existence status information of all structural components at risk of loosening inside the prefabricated building, structural health judgment and early warning prompts are performed on the prefabricated building.

[0028] Optionally, a first dynamic detection is performed on all assembly connection areas inside the prefabricated building to obtain first motion dynamic data corresponding to the assembly connection areas; and the first motion dynamic data is analyzed to obtain assembly connection stress distribution state information inside the prefabricated building, including:

[0029] Acquire the extension orientation information of all assembly connection areas inside the prefabricated building, and based on the extension orientation information, perform global deformation dynamic detection on the assembly connection areas to obtain deformation stress action data corresponding to the assembly connection areas; wherein the deformation stress action data includes the magnitude and direction of the deformation action force;

[0030] Based on the distribution positions of all assembly connection areas inside the prefabricated building, the deformation stress action data corresponding to all assembly connection areas are fitted and sorted to obtain the assembly connection stress distribution state information inside the prefabricated building; wherein the assembly connection stress distribution state information includes the action value and action direction information of the assembly connection stress.

[0031] Optionally, based on the assembly connection stress distribution state information, an abnormal assembly connection area inside the prefabricated building is identified; a second dynamic detection is performed on the abnormal assembly connection area to obtain second motion dynamic data corresponding to the abnormal assembly connection area; the second motion dynamic data is analyzed to obtain relative position change information between different structural parts inside the abnormal assembly connection area, including:

[0032] Based on the assembly connection stress distribution state information and the assembly contact surface orientation information of all assembly connection areas, determine the stress action values ​​and action directions of all assembly contact surfaces under the assembly connection area; based on the stress action values ​​and action directions, judge whether the assembly connection area is in a stress balance state; if so, determine the assembly connection area as a normal assembly connection area; if not, determine the assembly connection area as an abnormal assembly connection area;

[0033] The movement motion of all structural parts under the abnormal assembly connection area is detected to obtain the movement amplitude and movement direction data of all structural parts; the movement amplitude and movement direction data of all structural parts are analyzed to obtain the relative displacement change trend information between any two structural parts in contact with each other among all structural parts under the abnormal assembly connection area.

[0034] Optionally, based on the relative position change information, identifying structural components at risk of loosening inside the prefabricated building; and based on the existence status information of all structural components at risk of loosening inside the prefabricated building, making a structural health judgment and providing an early warning prompt for the prefabricated building, including:

[0035] Based on the relative displacement change trend information, determine whether the contact area between the two structural members in contact with each other gradually decreases; if so, determine that the corresponding two structural members have a risk of loosening; otherwise, determine that the corresponding two structural members do not have a risk of loosening;

[0036] Obtain distribution position information of all structural parts with a risk of loosening inside the prefabricated building, and based on the distribution position information, identify distribution information of structurally unstable areas inside the prefabricated building; then, based on the distribution information of structurally unstable areas, determine the part inside the prefabricated building that is most likely to collapse first, and issue an early warning based on the position information of the part that is most likely to collapse first.

[0037] Optionally, when it is determined that the corresponding two structural members do not have a risk of loosening, determining whether the corresponding two structural members have a risk of collapse includes:

[0038] Step S1: Assume that the original contact center of the corresponding two structural members A and B is point O, and the actual displacement distance of the current contact center of the structural member A and the structural member B relative to point O is l AB , whose contact area is S AB , then the displacement coefficient between structural member A and structural member B is:

[0039]

[0040] In the above formula (1), WAB is the displacement coefficient between structural member A and structural member B, q is the standard value of uniformly distributed load, and E is the elastic modulus value of the material of structural member A and structural member B;

[0041] Step S2: Assume that the theoretical maximum allowable offset distance of the contact center of the structure A and the structure B relative to the point O is L AB , then the ratio of the actual displacement distance to the theoretical maximum allowable displacement distance is:

[0042]

[0043] In the above formula (2), K AB It is the ratio of the actual displacement distance to the theoretical maximum displacement distance allowed;

[0044] Step S3, judging whether the corresponding two structural members have a risk of collapse according to the calculation results of the above steps S1 and S2,

[0045] T AB =W AB (8-4K AB 2 +K AB 3 ) (3)

[0046] In the above formula (3), T AB is the collapse coefficient, when T AB When it is greater than 0.8, it indicates that the corresponding two structural members are at risk of collapse. AB When it is less than or equal to 0.8, it indicates that there is no collapse risk for the two corresponding structural members;

[0047] When there is a risk of collapse of two corresponding structural parts, the distribution position information of all structural parts with the risk of collapse inside the prefabricated building is obtained, and based on the distribution position information, the distribution information of structurally unstable areas inside the prefabricated building is identified; based on the distribution information of structurally unstable areas, the part inside the prefabricated building that is most likely to collapse first is judged, and based on the position information of the part that is most likely to collapse first, an early warning prompt is issued.

[0048] Compared with the prior art, the present invention has the following beneficial effects:

[0049] The prefabricated building structural health monitoring system and method provided in the present application perform a first dynamic detection on all assembly connection areas inside the prefabricated building to obtain first action dynamic data, thereby determining the assembly connection stress distribution state information inside the prefabricated building, and comprehensively identifying the stresses generated by the assembly connection of different structural parts; based on the assembly connection stress distribution state information, the abnormal assembly connection area is identified, and the second action dynamic data of the abnormal assembly connection area is detected and analyzed to obtain the relative position change information between different structural parts inside the abnormal assembly connection area, accurately identify the relative movement of the structural parts, and provide a reliable basis for subsequent judgment of whether there is a risk of loosening of the structural parts; then, based on the existence state information of all structural parts that are at risk of loosening inside the prefabricated building, the structural health of the prefabricated building is judged and early warning is given, the structural parts inside the prefabricated building are dynamically checked in a timely and comprehensive manner, and the structural health of the prefabricated building is accurately monitored and early warning is given in a timely manner. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the prior art descriptions. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. Among them:

[0051] Figure 1 A structural schematic diagram of an assembled building structure health monitoring system provided by the present invention.

[0052] Figure 2 A schematic flow chart of a method for monitoring the health of an assembled building structure provided by the present invention. DETAILED DESCRIPTION

[0053] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. It is to be understood that the specific embodiments described herein are only used to explain the present application, rather than to limit the present application. It should also be noted that, for ease of description, only some structures related to the present application are shown in the accompanying drawings, rather than all structures. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0054] The terms "including" and "having" and any variations thereof in this application are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device comprising a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products or devices.

[0055] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0056] See also Figure 1 As shown, an assembled building structure health monitoring system provided by an embodiment of the present application. The assembled building structure health monitoring system includes:

[0057] A first dynamic detection module is used to perform a first dynamic detection on all assembly connection areas inside the prefabricated building to obtain first motion dynamic data corresponding to the assembly connection areas;

[0058] A stress distribution identification module is used to analyze the first action dynamic data to obtain assembly connection stress distribution state information inside the prefabricated building;

[0059] An abnormal assembly connection area identification module is used to identify the abnormal assembly connection area inside the prefabricated building based on the stress distribution state information of the assembly connection;

[0060] A second dynamic detection and analysis module is used to perform a second dynamic detection on the abnormal assembly connection area to obtain second motion dynamic data corresponding to the abnormal assembly connection area; and analyze the second motion dynamic data to obtain relative position change information between different structural parts inside the abnormal assembly connection area;

[0061] A structural component identification module, used to identify structural components with a risk of loosening inside the prefabricated building based on the relative position change information;

[0062] The health judgment and early warning module is used to judge the structural health of the prefabricated building and provide early warning prompts based on the existence status information of all structural parts with loosening risks inside the prefabricated building.

[0063] The beneficial effects of the above embodiments are as follows: the prefabricated building structural health monitoring system performs a first dynamic detection on all assembly connection areas inside the prefabricated building to obtain first action dynamic data, thereby determining the assembly connection stress distribution state information inside the prefabricated building, and comprehensively identifying the stresses generated by the assembly connection of different structural parts; based on the assembly connection stress distribution state information, the system identifies abnormal assembly connection areas, detects and analyzes second action dynamic data of the abnormal assembly connection areas, obtains relative position change information between different structural parts inside the abnormal assembly connection areas, accurately identifies the relative movement of the structural parts, and provides a reliable basis for subsequent judgment of whether there is a risk of loosening of the structural parts; and then uses the existence status information of all structural parts that are at risk of loosening inside the prefabricated building to make structural health judgments and early warnings for the prefabricated building, timely and comprehensively conducts dynamic inspections of the structural parts inside the prefabricated building, and accurately monitors and promptly warns of the structural health of the prefabricated building.

[0064] In another embodiment, the first dynamic detection module is used to perform a first dynamic detection on all assembly connection areas inside the prefabricated building to obtain first motion dynamic data corresponding to the assembly connection areas, including:

[0065] Obtaining the extension orientation information of all assembly connection areas inside the prefabricated building, and based on the extension orientation information, performing global deformation dynamic detection on the assembly connection area to obtain deformation stress action data corresponding to the assembly connection area; wherein the deformation stress action data includes the magnitude and direction of the deformation action force;

[0066] The stress distribution identification module is used to analyze the first action dynamic data to obtain assembly connection stress distribution state information inside the prefabricated building, including:

[0067] Based on the distribution positions of all assembly connection areas inside the prefabricated building, the deformation stress action data corresponding to all assembly connection areas are fitted and sorted to obtain the assembly connection stress distribution state information inside the prefabricated building; wherein the assembly connection stress distribution state information includes the action value and action direction information of the assembly connection stress.

[0068] The beneficial effect of the above embodiment is that the interior of the prefabricated building includes structural parts of different types and shapes, and different structural parts can be assembled and connected by different methods such as snap-fitting, riveting, and screw connection. The structural strength of the corresponding assembly connection area is weaker than the structural strength of other structural parts, and it is easy to cause problems such as loosening of structural parts. For this purpose, the extension orientation information of all assembly connection areas inside the prefabricated building is first obtained. The extension orientation information can be but not limited to the extension orientation information of the assembly connection surface corresponding to the assembly connection area. Then, based on the extension orientation information of the assembly connection surface, a fiber Bragg grating is arranged on the assembly connection surface, so as to perform global deformation dynamic detection on the assembly connection area, and obtain the deformation stress action data corresponding to the assembly connection area, so as to comprehensively and accurately detect the deformation stress of the structural parts corresponding to the assembly connection area. In addition, the distribution positions of all assembly connection areas inside the prefabricated building and the deformation stress action data corresponding to all assembly connection areas are fitted and modeled to obtain the assembly connection stress distribution state information inside the prefabricated building, so as to comprehensively identify the action value and action direction of the assembly connection stress caused by the component connection inside the prefabricated building.

[0069] In another embodiment, the abnormal assembly connection area identification module is used to identify the abnormal assembly connection area inside the prefabricated building based on the assembly connection stress distribution state information, including:

[0070] Based on the information of the stress distribution state of the assembly connection and the orientation information of the respective assembly contact surfaces of all the assembly connection areas, determine the stress action values ​​and action directions of all the assembly contact surfaces under the assembly connection area; based on the stress action values ​​and action directions, judge whether the assembly connection area is in a stress balance state; if so, determine the assembly connection area as a normal assembly connection area; if not, determine the assembly connection area as an abnormal assembly connection area;

[0071] The second dynamic detection and analysis module is used to perform a second dynamic detection on the abnormal assembly connection area to obtain second motion dynamic data corresponding to the abnormal assembly connection area; analyze the second motion dynamic data to obtain relative position change information between different structural parts inside the abnormal assembly connection area, including:

[0072] The movement motion of all the structural parts under the abnormal assembly connection area is detected to obtain the movement amplitude and movement direction data of all the structural parts; the movement amplitude and movement direction data of all the structural parts are analyzed to obtain the relative displacement change trend information between any two structural parts in contact with each other among all the structural parts under the abnormal assembly connection area.

[0073] The beneficial effect of the above embodiment is that the assembly connection area contains at least two structural parts, and the orientation of the assembly contact surface between different structural parts will have different posture angles, so that the stress on the assembly contact surface between different structural parts will also change with the orientation of the assembly contact surface. For this reason, based on the assembly connection stress distribution state information and the assembly contact surface orientation information of all assembly connection areas, the stress action value and action direction of all assembly contact surfaces under the assembly connection area are determined, so as to judge whether the assembly connection area is in a stress balance state, thereby accurately identifying the abnormal assembly connection area inside the prefabricated building, facilitating subsequent analysis of only the abnormal assembly connection area, and narrowing the analysis scope of the assembly connection area. In addition, the movement action detection of all structural parts under the abnormal assembly connection area is carried out to obtain the movement amplitude and movement direction data of all structural parts, so as to obtain the relative displacement change trend information between any two structural parts in contact with each other among all structural parts under the abnormal assembly connection area, so as to quantify the relative displacement misalignment speed between the two structural parts in contact with each other.

[0074] In another embodiment, the structural member identification module is used to identify structural members with a risk of loosening inside the prefabricated building based on the relative position change information, including:

[0075] Based on the relative displacement change trend information, it is determined whether the contact area between the two structural parts in contact with each other is gradually decreasing; if so, it is determined that the corresponding two structural parts have a risk of loosening; otherwise, it is determined that the corresponding two structural parts do not have a risk of loosening;

[0076] The health judgment and early warning module is used to judge the structural health of the prefabricated building and provide early warning prompts based on the existence status information of all structural parts with loosening risks inside the prefabricated building, including:

[0077] The distribution position information of all structural parts with a risk of loosening inside the prefabricated building is obtained, and based on the distribution position information, the distribution information of structurally unstable areas inside the prefabricated building is identified; based on the distribution information of structurally unstable areas, the part inside the prefabricated building that is most likely to collapse first is determined, and based on the position information of the part that is most likely to collapse first, an early warning is issued.

[0078] The beneficial effect of the above embodiment is that based on the relative displacement change trend information, it is judged whether the contact area between the two structural parts in contact with each other is gradually decreasing. The larger the contact area between the two structural parts in contact with each other, the smaller the probability of loosening between the two structural parts in contact with each other. If the contact area between the two structural parts in contact with each other is gradually decreasing, it is determined that the corresponding two structural parts have a risk of loosening; otherwise, it is determined that the corresponding two structural parts do not have a risk of loosening, thereby accurately judging whether there is a risk of loosening between the two structural parts. The distribution position information of all structural parts with a risk of loosening inside the prefabricated building is also obtained to identify the distribution information of the structural unstable area inside the prefabricated building. Specifically, the position area corresponding to the number of structural parts with a risk of loosening exceeding the preset number threshold can be determined as a structural unstable area. Based on the distribution information of the structural unstable area, the part of the prefabricated building that is most likely to collapse first is judged, and based on the position information of the part that is most likely to collapse first, an early warning prompt is given, so that the structural health problems existing in the prefabricated building can be accurately and quickly warned.

[0079] See also Figure 2 As shown, an embodiment of the present application provides a method for monitoring the health of an assembled building structure. The method for monitoring the health of an assembled building structure includes:

[0080] Performing a first dynamic detection on all assembly connection areas inside the prefabricated building to obtain first motion dynamic data corresponding to the assembly connection areas; analyzing the first motion dynamic data to obtain assembly connection stress distribution state information inside the prefabricated building;

[0081] Based on the assembly connection stress distribution state information, an abnormal assembly connection area inside the prefabricated building is identified; a second dynamic detection is performed on the abnormal assembly connection area to obtain second motion dynamic data corresponding to the abnormal assembly connection area; the second motion dynamic data is analyzed to obtain relative position change information between different structural parts inside the abnormal assembly connection area;

[0082] Based on the relative position change information, structural components at risk of loosening inside the prefabricated building are identified; based on the existence status information of all structural components at risk of loosening inside the prefabricated building, structural health judgment and early warning prompts are performed on the prefabricated building.

[0083] The beneficial effects of the above embodiments are as follows: the method for monitoring the structural health of prefabricated buildings performs a first dynamic detection on all assembly and connection areas inside the prefabricated building to obtain first action dynamic data, thereby determining the assembly and connection stress distribution state information inside the prefabricated building, and comprehensively identifying the stresses generated by the assembly and connection of different structural parts; based on the assembly and connection stress distribution state information, the method identifies abnormal assembly and connection areas, detects and analyzes second action dynamic data of the abnormal assembly and connection areas, obtains relative position change information between different structural parts inside the abnormal assembly and connection areas, accurately identifies the relative movement of the structural parts, and provides a reliable basis for subsequent judgment of whether there is a risk of loosening of the structural parts; and then uses the existence state information of all structural parts that are at risk of loosening inside the prefabricated building to make structural health judgments and early warnings for the prefabricated building, timely and comprehensively conducts dynamic inspections of the structural parts inside the prefabricated building, and accurately monitors and promptly warns of the structural health of the prefabricated building.

[0084] In another embodiment, a first dynamic detection is performed on all assembly connection areas inside the prefabricated building to obtain first motion dynamic data corresponding to the assembly connection areas; the first motion dynamic data is analyzed to obtain assembly connection stress distribution state information inside the prefabricated building, including:

[0085] Obtaining the extension orientation information of all assembly connection areas inside the prefabricated building, and based on the extension orientation information, performing global deformation dynamic detection on the assembly connection area to obtain deformation stress action data corresponding to the assembly connection area; wherein the deformation stress action data includes the magnitude and direction of the deformation action force;

[0086] Based on the distribution positions of all assembly connection areas inside the prefabricated building, the deformation stress action data corresponding to all assembly connection areas are fitted and sorted to obtain the assembly connection stress distribution state information inside the prefabricated building; wherein the assembly connection stress distribution state information includes the action value and action direction information of the assembly connection stress.

[0087] The beneficial effect of the above embodiment is that the interior of the prefabricated building includes structural parts of different types and shapes, and different structural parts can be assembled and connected by different methods such as snap-fitting, riveting, and screw connection. The structural strength of the corresponding assembly connection area is weaker than the structural strength of other structural parts, and it is easy to cause problems such as loosening of structural parts. For this purpose, the extension orientation information of all assembly connection areas inside the prefabricated building is first obtained. The extension orientation information can be but not limited to the extension orientation information of the assembly connection surface corresponding to the assembly connection area. Then, based on the extension orientation information of the assembly connection surface, a fiber Bragg grating is arranged on the assembly connection surface, so as to perform global deformation dynamic detection on the assembly connection area, and obtain the deformation stress action data corresponding to the assembly connection area, so as to comprehensively and accurately detect the deformation stress of the structural parts corresponding to the assembly connection area. In addition, the distribution positions of all assembly connection areas inside the prefabricated building and the deformation stress action data corresponding to all assembly connection areas are fitted and modeled to obtain the assembly connection stress distribution state information inside the prefabricated building, so as to comprehensively identify the action value and action direction of the assembly connection stress caused by the component connection inside the prefabricated building.

[0088] In another embodiment, based on the assembly connection stress distribution state information, an abnormal assembly connection area inside the prefabricated building is identified; a second dynamic detection is performed on the abnormal assembly connection area to obtain second motion dynamic data corresponding to the abnormal assembly connection area; the second motion dynamic data is analyzed to obtain relative position change information between different structural parts inside the abnormal assembly connection area, including:

[0089] Based on the information of the stress distribution state of the assembly connection and the orientation information of the respective assembly contact surfaces of all the assembly connection areas, determine the stress action values ​​and action directions of all the assembly contact surfaces under the assembly connection area; based on the stress action values ​​and action directions, judge whether the assembly connection area is in a stress balance state; if so, determine the assembly connection area as a normal assembly connection area; if not, determine the assembly connection area as an abnormal assembly connection area;

[0090] The movement motion of all the structural parts under the abnormal assembly connection area is detected to obtain the movement amplitude and movement direction data of all the structural parts; the movement amplitude and movement direction data of all the structural parts are analyzed to obtain the relative displacement change trend information between any two structural parts in contact with each other among all the structural parts under the abnormal assembly connection area.

[0091] The beneficial effect of the above embodiment is that the assembly connection area contains at least two structural parts, and the orientation of the assembly contact surface between different structural parts will have different posture angles, so that the stress on the assembly contact surface between different structural parts will also change with the orientation of the assembly contact surface. For this reason, based on the assembly connection stress distribution state information and the assembly contact surface orientation information of all assembly connection areas, the stress action value and action direction of all assembly contact surfaces under the assembly connection area are determined, so as to judge whether the assembly connection area is in a stress balance state, thereby accurately identifying the abnormal assembly connection area inside the prefabricated building, facilitating subsequent analysis of only the abnormal assembly connection area, and narrowing the analysis scope of the assembly connection area. In addition, the movement action detection of all structural parts under the abnormal assembly connection area is carried out to obtain the movement amplitude and movement direction data of all structural parts, so as to obtain the relative displacement change trend information between any two structural parts in contact with each other among all structural parts under the abnormal assembly connection area, so as to quantify the relative displacement misalignment speed between the two structural parts in contact with each other.

[0092] In another embodiment, based on the relative position change information, identifying structural components at risk of loosening inside the prefabricated building; based on the existence status information of all structural components at risk of loosening inside the prefabricated building, making a structural health judgment and providing an early warning prompt for the prefabricated building, including:

[0093] Based on the relative displacement change trend information, it is determined whether the contact area between the two structural parts in contact with each other is gradually decreasing; if so, it is determined that the corresponding two structural parts have a risk of loosening; otherwise, it is determined that the corresponding two structural parts do not have a risk of loosening;

[0094] The distribution position information of all structural parts with a risk of loosening inside the prefabricated building is obtained, and based on the distribution position information, the distribution information of structurally unstable areas inside the prefabricated building is identified; based on the distribution information of structurally unstable areas, the part inside the prefabricated building that is most likely to collapse first is determined, and based on the position information of the part that is most likely to collapse first, an early warning is issued.

[0095] The beneficial effect of the above embodiment is that based on the relative displacement change trend information, it is judged whether the contact area between the two structural parts in contact with each other is gradually decreasing. The larger the contact area between the two structural parts in contact with each other, the smaller the probability of loosening between the two structural parts in contact with each other. If the contact area between the two structural parts in contact with each other is gradually decreasing, it is determined that the corresponding two structural parts have a risk of loosening; otherwise, it is determined that the corresponding two structural parts do not have a risk of loosening, thereby accurately judging whether there is a risk of loosening between the two structural parts. The distribution position information of all structural parts with a risk of loosening inside the prefabricated building is also obtained to identify the distribution information of the structural unstable area inside the prefabricated building. Specifically, the position area corresponding to the number of structural parts with a risk of loosening exceeding the preset number threshold can be determined as a structural unstable area. Based on the distribution information of the structural unstable area, the part of the prefabricated building that is most likely to collapse first is judged, and based on the position information of the part that is most likely to collapse first, an early warning prompt is given, so that the structural health problems existing in the prefabricated building can be accurately and quickly warned.

[0096] In another embodiment, when it is determined that the corresponding two structural members do not have the risk of loosening, determining whether the corresponding two structural members have the risk of collapse includes:

[0097] Step S1: Assume that the original contact center of the corresponding two structural members A and B is point O, and the actual displacement distance of the current contact center of the structural member A and the structural member B relative to point O is l AB , whose contact area is S AB , then the displacement coefficient between structural member A and structural member B is:

[0098]

[0099] In the above formula (1), W AB is the displacement coefficient between structural member A and structural member B, q is the standard value of uniformly distributed load, and E is the elastic modulus value of the material of structural member A and structural member B;

[0100] Step S2: Assume that the theoretical maximum allowable offset distance of the contact center of the structure A and the structure B relative to the point O is L AB , then the ratio of the actual displacement distance to the theoretical maximum allowable displacement distance is:

[0101]

[0102] In the above formula (2), K AB It is the ratio of the actual displacement distance to the theoretical maximum displacement distance allowed;

[0103] Step S3, judging whether the corresponding two structural members have a risk of collapse according to the calculation results of the above steps S1 and S2,

[0104] T AB =W AB (8-4K AB 2 +K AB 3 ) (3)

[0105] In the above formula (3), T AB is the collapse coefficient, when T AB When it is greater than 0.8, it indicates that the corresponding two structural members are at risk of collapse. AB When it is less than or equal to 0.8, it indicates that there is no collapse risk for the two corresponding structural members;

[0106] When there is a risk of collapse of two corresponding structural parts, the distribution position information of all structural parts with the risk of collapse inside the prefabricated building is obtained, and based on the distribution position information, the distribution information of structurally unstable areas inside the prefabricated building is identified; based on the distribution information of structurally unstable areas, the part inside the prefabricated building that is most likely to collapse first is determined, and based on the position information of the part that is most likely to collapse first, an early warning prompt is issued.

[0107] The beneficial effect of the above embodiment is that even if some structural parts undergo relative displacement changes, their contact area will not change. For example, two structural parts are distributed in a "T" shape. However, in this case, if a large relative displacement change occurs, there will be a risk of collapse. Therefore, on the basis of determining that there is no risk of loosening of the two structural parts, it is also necessary to determine whether there is a risk of collapse to avoid major safety accidents caused by the lack of such judgment. In the above manner, according to the change in the relative distance between the structural parts, the theoretical value of the allowable relative offset distance, and the displacement coefficient of the structural parts, it is determined whether there is a risk of collapse when relative displacement occurs between the structural parts but the contact area remains unchanged, to avoid major safety accidents caused by the lack of such judgment.

[0108] In general, the prefabricated building structural health monitoring system and method performs a first dynamic detection on all assembly connection areas inside the prefabricated building to obtain first action dynamic data, thereby determining the assembly connection stress distribution state information inside the prefabricated building, and comprehensively identifying the stresses generated by the assembly connection of different structural parts; based on the assembly connection stress distribution state information, the abnormal assembly connection area is identified, and the second action dynamic data of the abnormal assembly connection area is detected and analyzed to obtain the relative position change information between different structural parts inside the abnormal assembly connection area, accurately identify the relative movement of the structural parts, and provide a reliable basis for subsequent judgment of whether there is a risk of loosening of the structural parts; then, the existence state information of all structural parts that are at risk of loosening inside the prefabricated building is used to judge the structural health of the prefabricated building and provide early warning prompts, and the structural parts inside the prefabricated building are dynamically checked in a timely and comprehensive manner to achieve accurate monitoring and timely early warning of the structural health of the prefabricated building.

[0109] The above is only a specific implementation of the present invention, and any other improvements made based on the concept of the present invention are considered to be within the protection scope of the present invention.

Claims

1. A prefabricated building structure health monitoring system, characterized in that: include: A first dynamic detection module is used to perform a first dynamic detection on all assembly connection areas inside the prefabricated building to obtain first motion dynamic data corresponding to the assembly connection areas; A stress distribution identification module, used to analyze the first action dynamic data to obtain assembly connection stress distribution state information inside the prefabricated building; An abnormal assembly connection area identification module is used to identify the abnormal assembly connection area inside the prefabricated building based on the assembly connection stress distribution state information; A second dynamic detection and analysis module is used to perform a second dynamic detection on the abnormal assembly connection area to obtain second action dynamic data corresponding to the abnormal assembly connection area; analyze the second action dynamic data to obtain relative position change information between different structural parts inside the abnormal assembly connection area; A structural component identification module, used for identifying structural components with a risk of loosening inside the prefabricated building based on the relative position change information; The health judgment and early warning module is used to judge the structural health of the prefabricated building and provide early warning prompts based on the existence status information of all structural parts with loosening risks inside the prefabricated building.

2. The prefabricated building structure health monitoring system according to claim 1, characterized in that: The first dynamic detection module is used to perform a first dynamic detection on all assembly connection areas inside the prefabricated building to obtain first motion dynamic data corresponding to the assembly connection areas, including: Acquire the extension orientation information of all assembly connection areas inside the prefabricated building, and based on the extension orientation information, perform global deformation dynamic detection on the assembly connection areas to obtain deformation stress action data corresponding to the assembly connection areas; wherein the deformation stress action data includes the magnitude and direction of the deformation action force; The stress distribution identification module is used to analyze the first action dynamic data to obtain assembly connection stress distribution state information inside the prefabricated building, including: Based on the distribution positions of all assembly connection areas inside the prefabricated building, the deformation stress action data corresponding to all assembly connection areas are fitted and sorted to obtain the assembly connection stress distribution state information inside the prefabricated building; wherein the assembly connection stress distribution state information includes the action value and action direction information of the assembly connection stress.

3. The prefabricated building structure health monitoring system according to claim 2, characterized in that: The abnormal assembly connection area identification module is used to identify the abnormal assembly connection area inside the prefabricated building based on the assembly connection stress distribution state information, including: Based on the assembly connection stress distribution state information and the assembly contact surface orientation information of all assembly connection areas, determine the stress action values ​​and action directions of all assembly contact surfaces under the assembly connection area; based on the stress action values ​​and action directions, judge whether the assembly connection area is in a stress balance state; if so, determine the assembly connection area as a normal assembly connection area; if not, determine the assembly connection area as an abnormal assembly connection area; The second dynamic detection and analysis module is used to perform a second dynamic detection on the abnormal assembly connection area to obtain second motion dynamic data corresponding to the abnormal assembly connection area; analyze the second motion dynamic data to obtain relative position change information between different structural parts inside the abnormal assembly connection area, including: The movement motion of all structural parts under the abnormal assembly connection area is detected to obtain the movement amplitude and movement direction data of all structural parts; the movement amplitude and movement direction data of all structural parts are analyzed to obtain the relative displacement change trend information between any two structural parts in contact with each other among all structural parts under the abnormal assembly connection area.

4. The prefabricated building structure health monitoring system according to claim 3, characterized in that: The structural component identification module is used to identify structural components with a risk of loosening inside the prefabricated building based on the relative position change information, and includes: Based on the relative displacement change trend information, determine whether the contact area between the two structural members in contact with each other is gradually decreasing; if so, determine that the corresponding two structural members are at risk of loosening; Otherwise, it is determined that there is no risk of loosening of the corresponding two structural parts; The health judgment and early warning module is used to judge the structural health of the prefabricated building and provide early warning prompts based on the existence status information of all structural parts with loosening risks inside the prefabricated building, including: Obtain distribution position information of all structural parts with a risk of loosening inside the prefabricated building, and based on the distribution position information, identify distribution information of structurally unstable areas inside the prefabricated building; then, based on the distribution information of structurally unstable areas, determine the part inside the prefabricated building that is most likely to collapse first, and issue an early warning based on the position information of the part that is most likely to collapse first.

5. A method for monitoring the health of an assembled building structure, characterized in that: include: Performing a first dynamic detection on all assembly connection areas inside the prefabricated building to obtain first motion dynamic data corresponding to the assembly connection areas; Analyzing the first action dynamic data to obtain assembly connection stress distribution state information inside the prefabricated building; Based on the assembly connection stress distribution state information, identifying abnormal assembly connection areas inside the prefabricated building; Performing a second dynamic detection on the abnormal assembly connection area to obtain second action dynamic data corresponding to the abnormal assembly connection area; analyzing the second action dynamic data to obtain relative position change information between different structural parts inside the abnormal assembly connection area; Based on the relative position change information, identifying structural components inside the prefabricated building that are at risk of loosening; Based on the existence status information of all structural parts with loosening risk inside the prefabricated building, the structural health judgment and early warning prompt of the prefabricated building are performed.

6. The method for monitoring the health of an assembled building structure according to claim 5, characterized in that: Performing a first dynamic detection on all assembly connection areas inside the prefabricated building to obtain first motion dynamic data corresponding to the assembly connection areas; Analyzing the first action dynamic data to obtain assembly connection stress distribution state information inside the prefabricated building includes: Acquire the extension orientation information of all assembly connection areas inside the prefabricated building, and based on the extension orientation information, perform global deformation dynamic detection on the assembly connection areas to obtain deformation stress action data corresponding to the assembly connection areas; wherein the deformation stress action data includes the magnitude and direction of the deformation action force; Based on the distribution positions of all assembly connection areas inside the prefabricated building, the deformation stress action data corresponding to all assembly connection areas are fitted and sorted to obtain the assembly connection stress distribution state information inside the prefabricated building; wherein the assembly connection stress distribution state information includes the action value and action direction information of the assembly connection stress.

7. The method for health monitoring of prefabricated building structures according to claim 6, characterized in that: Based on the assembly connection stress distribution state information, identifying the abnormal assembly connection area inside the prefabricated building; performing a second dynamic detection on the abnormal assembly connection area to obtain second action dynamic data corresponding to the abnormal assembly connection area; The second action dynamic data is analyzed to obtain relative position change information between different structural parts in the abnormal assembly connection area, including: Based on the assembly connection stress distribution state information and the assembly contact surface orientation information of all assembly connection areas, determine the stress action values ​​and action directions of all assembly contact surfaces under the assembly connection area; based on the stress action values ​​and action directions, judge whether the assembly connection area is in a stress balance state; if so, determine the assembly connection area as a normal assembly connection area; if not, determine the assembly connection area as an abnormal assembly connection area; The movement motion of all structural parts under the abnormal assembly connection area is detected to obtain the movement amplitude and movement direction data of all structural parts; the movement amplitude and movement direction data of all structural parts are analyzed to obtain the relative displacement change trend information between any two structural parts in contact with each other among all structural parts under the abnormal assembly connection area.

8. The method for monitoring the health of an assembled building structure according to claim 7, characterized in that: Based on the relative position change information, identifying structural components inside the prefabricated building that are at risk of loosening; Based on the existence status information of all structural parts with loosening risk inside the prefabricated building, the structural health judgment and early warning prompt of the prefabricated building are performed, including: Based on the relative displacement change trend information, determine whether the contact area between the two structural members in contact with each other is gradually decreasing; if so, determine that the corresponding two structural members are at risk of loosening; Otherwise, it is determined that there is no risk of loosening of the corresponding two structural parts; Obtain distribution position information of all structural parts with a risk of loosening inside the prefabricated building, and based on the distribution position information, identify distribution information of structurally unstable areas inside the prefabricated building; then, based on the distribution information of structurally unstable areas, determine the part inside the prefabricated building that is most likely to collapse first, and issue an early warning based on the position information of the part that is most likely to collapse first.

9. The method for monitoring the health of an assembled building structure according to claim 8, characterized in that: When it is determined that there is no risk of loosening of the corresponding two structural members, it is then determined whether there is a risk of collapse of the corresponding two structural members, including: Step S1: Assume that the original contact center of the corresponding two structural members A and B is point O, and the actual displacement distance of the current contact center of the structural member A and the structural member B relative to point O is l AB , whose contact area is S AB , then the displacement coefficient between structural member A and structural member B is: In the above formula (1), W AB is the displacement coefficient between structural member A and structural member B, q is the standard value of uniformly distributed load, and E is the elastic modulus value of the material of structural member A and structural member B; Step S2: Assume that the theoretical maximum allowable offset distance of the contact center of the structure A and the structure B relative to the point O is L AB , then the ratio of the actual displacement distance to the theoretical maximum allowable displacement distance is: In the above formula (2), K AB It is the ratio of the actual displacement distance to the theoretical maximum displacement distance allowed; Step S3, judging whether the corresponding two structural members have a risk of collapse according to the calculation results of the above steps S1 and S2, T AB =W AB (8-4K AB 2 +K AB 3 ) (3) In the above formula (3), T AB is the collapse coefficient, when T AB When it is greater than 0.8, it indicates that the corresponding two structural members are at risk of collapse. AB When it is less than or equal to 0.8, it indicates that there is no collapse risk for the two corresponding structural members; When there is a risk of collapse of two corresponding structural parts, the distribution position information of all structural parts with the risk of collapse inside the prefabricated building is obtained, and based on the distribution position information, the distribution information of structurally unstable areas inside the prefabricated building is identified; based on the distribution information of structurally unstable areas, the part inside the prefabricated building that is most likely to collapse first is judged, and based on the position information of the part that is most likely to collapse first, an early warning prompt is issued.

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