High-precision synchronous splicing method for roof steel structure supported by forked columns

Abstract

The invention relates to the technical field of constructional engineering, in particular to a high-precision synchronous splicing method for a roof steel structure supported by a forked column, which comprises the following steps of: determining a splicing anisotropic component of each splicing end face by acquiring splicing end face information of a roof frame and the forked column in advance, and screening the splicing end faces with anisotropic characteristics by calculating a splicing anisotropic index; the synchronization difficulty category of the bifurcated column supporting substructures is determined according to the spatial position distribution condition of the special-shaped feature splicing end faces, and finally, a movement optimization strategy is determined for the lifting installation track of each bifurcated column supporting substructure according to the synchronization difficulty category, including the steps of controlling the bifurcated column supporting substructures to pause at the screened track pause points. And controlling the bifurcated column supporting substructures to perform speed regulation at the screened track speed regulation points, so that screening of multi-dimensional information with data characterization is realized, construction control is integrated, a splicing optimization strategy is scientifically planned, and the construction quality and efficiency of steel structure splicing construction are improved.

Description

Technical Field

[0001] The invention relates to the technical field of building engineering, and in particular to a high-precision synchronous splicing method of a roof steel structure supported by a bifurcated column. Background Art

[0002] In the field of modern architecture, large-span roof steel structures have unique spatial expression and good mechanical properties. The multi-branch structure of the bifurcated column makes the spatial position and stress state of each support point extremely complex. The spliced ​​end faces with the roof frame often present non-horizontal and asymmetric inclinations, and there are large differences in the end face areas. The complex characteristics of the spliced ​​end faces have brought great difficulties to the construction. Traditional construction methods are difficult to achieve high-precision synchronous splicing, which easily leads to uneven contact force during splicing and increased bolt hole misalignment rate, which in turn affects the stability and safety of the entire structure. Therefore, a high-precision synchronous splicing method came into being, aiming to solve the many problems faced by traditional construction methods in the splicing of bifurcated column-supported roof steel structures and improve construction quality and efficiency.

[0003] For example, Chinese Patent Publication No.: CN111379368A, the invention discloses a steel structure installation system, installed at the bottom of the roof of a building, including: a first number of harp hangers, a first connecting member and a second connecting member corresponding to each of the harp hangers, a fixing member corresponding to each of the second connecting members, a round tube, and a steel structure grid at the bottom of the roof, wherein the round tube is fixed below the steel structure grid, a plurality of the fixing members are sequentially installed on the round tube according to preset positions, each of the first connecting members is fixed to the corresponding fixing member, each of the second connecting members is fixed to the top of the corresponding harp hanger, and each of the first connecting members is fixed to the corresponding second connecting member to form the steel structure installation system.

[0004] The prior art still has the following problems: The existing technology does not consider the influence of the distribution of splicing end faces on the internal load transfer in the steel structure supported by the bifurcated columns. The existing technology cannot integrate the multi-dimensional information data of the splicing end faces into the construction control, and cannot scientifically plan the splicing optimization strategy, which affects the construction quality and efficiency of the steel structure splicing construction. Summary of the invention

[0005] To this end, the present invention provides a high-precision synchronous splicing method for a roof steel structure supported by a forked column, so as to overcome the problem that the prior art cannot integrate the multi-dimensional information data of the splicing end faces into construction control and cannot scientifically plan the splicing optimization strategy.

[0006] To achieve the above object, the present invention provides a high-precision synchronous splicing method for a roof steel structure supported by a bifurcated column, comprising: Pre-acquire the splicing end face information of the roof frame and the bifurcated column in the bifurcated column supporting substructure, wherein the splicing end face information includes the end face area and the end face inclination angle of the splicing end face; Determine the splicing anisotropy component of each splicing end face based on the splicing end face information, and screen the anisotropic characteristic splicing end faces in the bifurcated column support substructure according to the splicing end face information and the splicing anisotropy index calculated from the splicing anisotropy component; Determine the synchronization difficulty category of the bifurcated column support substructure according to the analysis results of the spatial position distribution of several anisotropic characteristic splicing end faces, wherein the spatial position distribution is determined according to the position coordinates of the anisotropic characteristic splicing end faces; Acquire the pre-stored lifting and installation trajectory of each bifurcated column support substructure, and determine the movement optimization strategy of the bifurcated column support substructure along the lifting and installation trajectory based on the synchronization difficulty category; The movement optimization strategy is to determine a number of trajectory stopping points on the lifting and installation trajectory, control the bifurcated column support substructure to stop at the trajectory stopping points, or determine a number of trajectory speed adjustment points on the lifting and installation trajectory, control the bifurcated column support substructure to adjust the speed at the trajectory speed adjustment points.

[0007] Furthermore, the process of determining the splicing heterogeneity component includes: Acquire the end face inclination angle in the splicing end face information; Determine the vector length of the component vector of the gravity unit vector along the spliced ​​end face based on the end face inclination angle; Determine the vector length as the splicing anisotropy component of the splicing end face; The end face inclination angle is the angle between the spliced ​​end face and the horizontal ground, and the vector direction of the gravity unit vector is the downward direction perpendicular to the horizontal ground.

[0008] Furthermore, the splicing heterogeneity index is calculated as follows: Acquire the end face area from the splicing end face information of the splicing end face; The ratio of the splicing anisotropy component of the splicing end face to the end face area is calculated, and the ratio is dimensionless to obtain the splicing anisotropy index of the splicing end face.

[0009] Furthermore, the process of screening the splicing end faces with different characteristics includes: According to the determination result that the splicing anisotropy index of the splicing end face satisfies the anisotropy screening condition, the splicing end face is screened as anisotropy characteristic splicing end face; According to the determination result that the splicing anisotropy index of the splicing end face does not satisfy the anisotropy screening condition, the splicing end face is not screened; Among them, the heterogeneity screening condition is that the splicing heterogeneity index exceeds a preset splicing heterogeneity index threshold.

[0010] Furthermore, the spatial distribution of several splicing end faces with different characteristics is determined, including: Obtain the coordinates corresponding to the positions of the splicing end faces with various anisotropic features in the geodetic coordinate system; Determine a set of several heterogeneous characteristic splicing end faces with the same spatial height dimension according to the coordinates; The coordinates corresponding to the anisotropic feature splicing end faces are obtained in a single anisotropic feature splicing end face set, and the distance between the position of the anisotropic feature splicing end faces and the axis of the bifurcation column is determined according to the coordinates.

[0011] Further, the process of determining the synchronization difficulty category of the bifurcated column support substructure includes: If the distance between the position of the heterogeneous characteristic splicing end face in the heterogeneous characteristic splicing end face set and the axis of the bifurcated column is different, the synchronization difficulty category of the bifurcated column support substructure is determined to be a strong dominant synchronization difficulty category; If the distances between the positions of the anisotropic feature splicing end faces in the set of anisotropic feature splicing end faces and the axis of the bifurcated column are the same, then the synchronization difficulty category of the bifurcated column supporting substructure is determined to be a weakly dominant synchronization difficulty category.

[0012] Further, determine the mobile optimization strategy, including: If the bifurcated column support substructure is a highly explicit category of synchronization difficulty, the movement optimization strategy is to determine a number of track pause points on the lifting installation track, and control the bifurcated column support substructure to pause at the track pause points; If the bifurcated column supporting substructure is of the weakly dominant category of synchronization difficulty, the movement optimization strategy is to determine a number of trajectory speed control points on the lifting installation trajectory, and control the bifurcated column supporting substructure to adjust the speed at the trajectory speed control points.

[0013] Furthermore, the method for determining the track stop point is: The curvatures of several points on the lifting installation trajectory are determined, and the points where the curvature exceeds a preset curvature screening value are determined as the trajectory stop points.

[0014] Furthermore, the trajectory speed adjustment point is determined as follows: The moving speeds corresponding to a plurality of points on the lifting installation trajectory are determined, and the points where the moving speed exceeds a preset moving speed screening value are determined as the trajectory speed regulating points.

[0015] Furthermore, the pause duration of the bifurcated column support substructure at the track pause point and the deceleration amount of the bifurcated column support substructure at the track speed adjustment point are controlled according to the splicing anisotropy index, wherein: The pause duration is positively correlated with the structural anisotropy value, the deceleration amount is positively correlated with the structural anisotropy value, and the structural anisotropy value is the average value of the splicing anisotropy index of several anisotropic characteristic splicing end faces in the bifurcated column support substructure.

[0016] Compared with the prior art, the beneficial effect of the present invention lies in that the present invention determines the splicing anisotropic components of each splicing end face by pre-acquiring the splicing end face information of the roof frame and the bifurcated column, screens the anisotropic characteristic splicing end faces by calculating the splicing anisotropic index, determines the synchronization difficulty category of the bifurcated column supporting substructure by the spatial position distribution of the anisotropic characteristic splicing end faces, and finally determines the movement optimization strategy for the lifting and installation trajectory of each bifurcated column supporting substructure according to the synchronization difficulty category, including controlling the bifurcated column supporting substructure to pause at the screened trajectory pause point, and controlling the bifurcated column supporting substructure to speed up at the screened trajectory speed adjustment point, thereby realizing the screening of multi-dimensional information with data representation and integrating it into construction control, and scientifically planning the splicing optimization strategy, so as to improve the construction quality and efficiency of steel structure splicing construction.

[0017] Furthermore, the present invention can accurately quantify the magnitude of the gravity component along the splicing end face by determining the vector length of the component vector of the gravity unit vector along the splicing end face as the splicing anisotropic component. The magnitude of the component force intuitively reflects the tendency of the splicing end face to deviate sideways along the end face under the action of gravity, thereby realizing the screening of multi-dimensional information with data representation and integrating it into construction control.

[0018] Furthermore, the present invention calculates the splicing anisotropy index by calculating the ratio of the splicing anisotropy component of the splicing end face to the end face area, and comprehensively considers the influence of the gravity component and the end face area on the lateral deviation. The splicing anisotropy index can accurately reflect the risk degree of lateral deviation of each splicing end face, clarify the splicing anisotropy index and use it to screen splicing end faces with anisotropy characteristics, and quantify the lateral deviation risk that is difficult to express intuitively. Furthermore, it realizes the screening of multi-dimensional information with data representation and integrates it into construction control.

[0019] Furthermore, the present invention, by acquiring the coordinates of the anisotropic feature splicing end faces in the geodetic coordinate system and further analyzing their distances from the axis of the bifurcated column, can accurately determine the synchronization difficulty category of the bifurcated column supporting substructure, clarify the strong and explicit categories of synchronization difficulty, and classify the uneven structural load effects caused by different distances between the end faces and the axis, thereby realizing the screening of multi-dimensional information with data representation and integrating it into construction control.

[0020] Furthermore, in the construction of bifurcated column supporting substructures of the category with strong and explicit synchronization difficulty, the present invention can effectively improve the construction accuracy by determining the point on the lifting and installation trajectory where the curvature exceeds the preset value as the trajectory pause point and controlling the substructure to pause. Since such substructures face complex situations caused by the different distances between the end face and the axis of the bifurcated column when splicing, the movement direction of the structure changes dramatically at the point with larger trajectory curvature, which can easily cause internal splicing errors and lead to abnormal internal stress concentration. When the substructure moves on the lifting and installation trajectory, the point with large curvature means that the stress state of the structure changes complexly. If it continues to move rapidly, the structure may be partially damaged or even become unstable as a whole due to sudden stress changes. The pause during the movement can redistribute the stress in the structure during a short period of stillness and return to a more stable mechanical state. Furthermore, it realizes the screening of multi-dimensional information with data representation and integrates it into construction control, and scientifically plans splicing optimization strategies to improve the construction quality and efficiency of steel structure splicing construction.

[0021] Furthermore, for the bifurcated column supporting substructures of the weakly dominant category of synchronization difficulty, the present invention determines the points on the lifting and installation trajectory where the moving speed exceeds the preset value as the trajectory speed adjustment points and adjusts the speed, which can effectively improve the construction accuracy. Although the splicing difficulty of such substructures is relatively low, at the high-speed moving trajectory points, the structure may still produce positional deviations due to factors such as inertia. By adjusting the speed, the moving speed of the structure can be reduced, and the positional deviation caused by inertia can be reduced. Furthermore, it realizes the screening of multi-dimensional information with data representation and integrates it into construction control, and scientifically plans the splicing optimization strategy, thereby improving the construction quality and efficiency of steel structure splicing construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a step diagram of a high-precision synchronous splicing method of a roof steel structure supported by a bifurcated column according to an embodiment of the present invention; Figure 2 A diagram showing the steps for determining splicing heterogeneous components according to an embodiment of the present invention; Figure 3 A diagram showing the steps of determining the spatial position distribution of the splicing end faces with different characteristics according to an embodiment of the present invention; Figure 4 A logical flow chart for determining a synchronization difficulty category for a bifurcated column support substructure for an embodiment of the present invention. DETAILED DESCRIPTION

[0023] In order to make the objects and advantages of the present invention more clearly understood, the present invention is further described below in conjunction with embodiments; it should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0024] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the protection scope of the present invention.

[0025] It should be noted that, in the description of the present invention, terms such as "upper", "lower", "inside" and "outside" indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings. This is only for the convenience of description and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.

[0026] See also Figure 1 As shown, it is a step diagram of a high-precision synchronous splicing method for a roof steel structure supported by a bifurcated column according to an embodiment of the present invention. The high-precision synchronous splicing method for a roof steel structure supported by a bifurcated column according to the present invention comprises: Step S10, pre-acquiring the splicing end surface information of the roof frame and the bifurcated column in the bifurcated column supporting substructure, wherein the splicing end surface information includes the end surface area and the end surface inclination angle of the splicing end surface; Specifically, BIM technology can be used to create a three-dimensional information model of the roof steel structure. In the model, information such as the geometric shape, size, and mutual connection relationship of the roof frame and the bifurcated columns is stored, and relevant parameters of the spliced ​​end faces, such as the end face area and the end face inclination angle, are also included. Using BIM technology to pre-create a three-dimensional information model of the roof steel structure is an existing technology and will not be repeated here.

[0027] Step S20, determining the splicing anisotropic component of each splicing end face based on the splicing end face information, and screening the splicing end faces with anisotropic characteristics in the bifurcated column support substructure according to the splicing end face information and the splicing anisotropic index calculated from the splicing anisotropic component; Step S30, determining the synchronization difficulty category of the bifurcated column support substructure according to the analysis result of the spatial position distribution of the splicing end faces of the anisotropic characteristics, wherein the spatial position distribution is determined according to the position coordinates of the splicing end faces of the anisotropic characteristics; Specifically, the position coordinates of the anisotropic feature splicing end faces are the coordinates corresponding to the positions of the anisotropic feature splicing end faces in the geodetic coordinate system. The present invention does not limit the geodetic coordinate system. It can be understood that the geodetic coordinate system, as a widely used geographic space positioning standard system, has the characteristics of high precision and will not be elaborated here.

[0028] Step S40, obtaining a pre-stored lifting and installation trajectory of each bifurcated column support substructure, and determining a movement optimization strategy of the bifurcated column support substructure along the lifting and installation trajectory based on the synchronization difficulty category; The movement optimization strategy is to determine a number of trajectory stopping points on the lifting and installation trajectory, control the bifurcated column support substructure to stop at the trajectory stopping points, or determine a number of trajectory speed adjustment points on the lifting and installation trajectory, control the bifurcated column support substructure to adjust the speed at the trajectory speed adjustment points.

[0029] Specifically, the pre-stored lifting and installation trajectories of each forked column supporting substructure are well known to technical personnel in this field. Common lifting technologies include hydraulic lifting, etc. Generating a lifting and installation trajectory based on the lifting position of the forked column supporting substructure and the target installation position is a commonly used technical means at existing construction sites. It can provide clear guidance for the construction process and will not be repeated here.

[0030] Specifically, see Figure 2 As shown, it is a step diagram of determining the splicing heterogeneous components according to an embodiment of the present invention. The process of determining the splicing heterogeneous components includes: Step S21, obtaining the end face inclination angle in the splicing end face information; Step S22, determining the vector length of the component vector of the gravity unit vector along the spliced ​​end face based on the end face inclination angle; Step S23, determining the vector length as the splicing anisotropic component of the spliced ​​end face; The end face inclination angle is the angle between the spliced ​​end face and the horizontal ground, and the vector direction of the gravity unit vector is the downward direction perpendicular to the horizontal ground.

[0031] In implementation, it is known that the end face inclination angle A is the angle between the splicing end face and the horizontal ground, and the direction of the gravity unit vector is perpendicular to the horizontal ground and downward. By utilizing the relationship of trigonometric functions, the vector length of the component vector of the gravity unit vector along the splicing end face can be accurately calculated based on the end face inclination angle, that is, if the vector length of the gravity unit vector is |G|=1, and the angle value of the end face inclination angle A is θ, then the vector length of the component vector of the gravity unit vector along the splicing end face |L|=|G|sinθ.

[0032] Specifically, the present invention can accurately quantify the magnitude of the gravity component along the splicing end face by determining the vector length of the component vector of the gravity unit vector along the splicing end face as the splicing anisotropic component. The magnitude of the component force intuitively reflects the tendency of the splicing end face to deviate sideways along the end face under the action of gravity, thereby realizing the screening of multi-dimensional information with data representation and integrating it into construction control.

[0033] Specifically, in the mechanics system, the decomposition of force follows the parallelogram law. Gravity, as a common and always-existing external force, acts on the spliced ​​end faces of the roof steel structure. Gravity is decomposed into two components, one perpendicular to the spliced ​​end faces and the other parallel to the spliced ​​end faces. The component parallel to the spliced ​​end faces is the key factor causing the lateral deviation of the spliced ​​end faces. By determining the vector length of the component vector of the gravity unit vector along the spliced ​​end faces, the magnitude of the component force can be accurately obtained. This quantification method is consistent with the theory of classical mechanics. Specifically, the splicing heterogeneity index is calculated as follows: Acquire the end face area from the splicing end face information of the splicing end face; The ratio of the splicing anisotropy component of the splicing end face to the end face area is calculated, and the ratio is dimensionless to obtain the splicing anisotropy index of the splicing end face.

[0034] Specifically, the building information model BIM contains detailed information on each component of the building, and the required splicing end surface area information can be obtained based on the building information model, which will not be repeated here.

[0035] Specifically, the process of screening the splicing end faces with heterogeneous features includes: According to the determination result that the splicing anisotropy index of the splicing end face satisfies the anisotropy screening condition, the splicing end face is screened as anisotropy characteristic splicing end face; According to the determination result that the splicing anisotropy index of the splicing end face does not satisfy the anisotropy screening condition, the splicing end face is not screened; Among them, the heterogeneity screening condition is that the splicing heterogeneity index exceeds a preset splicing heterogeneity index threshold.

[0036] In implementation, the splicing heterogeneity index threshold can be obtained in advance through experiments, and the experimental data are shown in the following table;

[0037] It can be seen from the above experimental data that the smaller the splicing anisotropy index threshold is set, the more anisotropic feature splicing end faces are screened out. According to the actual side deviation obtained from the experiment, technical personnel in this field set the splicing anisotropy index threshold according to the construction accuracy requirements. The setting range of the splicing anisotropy index threshold is [3, 4]. Preferably, the splicing anisotropy index threshold can be set to 3.6. Under this setting value, the side deviation required by the construction can be within 3.2 mm.

[0038] Specifically, the present invention calculates the splicing anisotropy index by calculating the ratio of the splicing anisotropy component of the splicing end face to the end face area, and comprehensively considers the influence of the gravity component and the end face area on the lateral deviation. The splicing anisotropy index can accurately reflect the risk degree of lateral deviation of each splicing end face, clarify the splicing anisotropy index and use it to screen splicing end faces with anisotropic characteristics, and quantify the lateral deviation risk that is difficult to express intuitively. Furthermore, it realizes the screening of multi-dimensional information with data representation and integrates it into construction control.

[0039] Specifically, during the splicing process of the roof steel structure, gravity is an external force that always exists and acts on the splicing end faces. Gravity will be decomposed into components perpendicular to the end faces and along the end faces on the splicing end faces at different inclination angles. The splicing anisotropic component represents the magnitude of the component along the splicing end faces. The larger its value, the stronger the tendency of the splicing end faces to deviate laterally under the influence of gravity in theory. The end face area also affects the lateral deviation. A smaller end face area means that under the same lateral deviation component, the force per unit area is greater, making it more likely to deviate laterally. The splicing anisotropic index is obtained by dividing the splicing anisotropic component by the end face area, which can comprehensively consider the degree of influence of these two key factors on the lateral deviation.

[0040] Specifically, see Figure 3 As shown, it is a step diagram of determining the spatial position distribution of the splicing end faces with different characteristics according to an embodiment of the present invention, and determining the spatial position distribution of several splicing end faces with different characteristics includes: Step S31, obtaining the coordinates corresponding to the positions of the spliced ​​end faces with different anisotropic characteristics in the geodetic coordinate system; Step S32, determining a set of multiple heterogeneous characteristic splicing end faces with the same spatial height dimension according to the coordinates; Step S33, obtaining coordinates corresponding to the anisotropic feature splicing end faces in a single anisotropic feature splicing end face set, and determining the distance between the position of the anisotropic feature splicing end faces and the axis of the bifurcation column according to the coordinates.

[0041] Specifically, see Figure 4 As shown, it is a logic flow chart of determining the synchronization difficulty category of the bifurcated column support substructure according to an embodiment of the present invention. The process of determining the synchronization difficulty category of the bifurcated column support substructure includes: If the distance between the position of the heterogeneous characteristic splicing end face in the heterogeneous characteristic splicing end face set and the axis of the bifurcated column is different, the synchronization difficulty category of the bifurcated column support substructure is determined to be a strong dominant synchronization difficulty category; If the distances between the positions of the anisotropic feature splicing end faces in the set of anisotropic feature splicing end faces and the axis of the bifurcated column are the same, then the synchronization difficulty category of the bifurcated column supporting substructure is determined to be a weakly dominant synchronization difficulty category.

[0042] Specifically, after obtaining the geodetic coordinates of the splicing end faces with various anisotropic characteristics, several sets of splicing end faces with the same spatial height dimension are determined based on the elevation information in the coordinates. In three-dimensional space, points with the same height dimension constitute a horizontal plane. By screening the splicing end face coordinates with the same elevation value, the splicing end faces at the same horizontal height can be grouped together. This division method simplifies the originally complex three-dimensional spatial distribution problem into an analysis of multiple two-dimensional levels, reducing the difficulty of analysis. Each set represents the distribution status of the key splicing parts of the roof steel structure on a certain specific height plane.

[0043] Specifically, the present invention obtains the coordinates of the anisotropic feature splicing end faces in the geodetic coordinate system, and further analyzes the distance between the end faces and the axis of the bifurcated column. It can accurately determine the synchronization difficulty category of the bifurcated column supporting substructure, clarify the strong and explicit categories of synchronization difficulty, and classify the uneven structural load effects caused by the different distances between the end faces and the axis. Furthermore, it realizes the screening of multi-dimensional information with data representation and integrates it into construction control.

[0044] Specifically, determine a mobile optimization strategy, including: If the bifurcated column support substructure is a highly explicit category of synchronization difficulty, the movement optimization strategy is to determine a number of track pause points on the lifting installation track, and control the bifurcated column support substructure to pause at the track pause points; If the bifurcated column supporting substructure is of the weakly dominant category of synchronization difficulty, the movement optimization strategy is to determine a number of trajectory speed control points on the lifting installation trajectory, and control the bifurcated column supporting substructure to adjust the speed at the trajectory speed control points.

[0045] Specifically, the method for determining the track stop point is: The curvatures of several points on the lifting installation trajectory are determined, and the points where the curvature exceeds a preset curvature screening value are determined as the trajectory stop points.

[0046] In implementation, a numerical difference method can be used to approximate the curvature calculation, which will not be elaborated here. The purpose of setting the preset curvature screening value is to screen the trajectory points where the moving direction changes significantly. If the value is too large, the purpose of effective screening cannot be achieved. If the value is too small, too many trajectory stop points are set, which affects the construction efficiency. The preset curvature screening value ranges from [1, 2.5]. Preferably, the preset curvature screening value is 2.

[0047] Specifically, during the lifting and installation process of the roof steel structure, the mechanical state of the structure is closely related to the lifting trajectory. The curvature of the points on the lifting and installation trajectory reflects the degree of change in the direction of the structure's movement. When the curvature is large, it means that the structure needs to change its moving direction in a short time, which will cause complex stress distribution inside the structure. According to the principles of material mechanics, rapid changes in direction will cause the structure to be subjected to large shear forces and bending moments locally, thereby causing stress concentration. For the bifurcated column support substructure with a strong and explicit synchronization difficulty, the force itself is more complex due to the different distances between the spliced ​​end faces and the axis of the bifurcated columns. This stress concentration problem will be more prominent at the trajectory points with large curvature. These stress concentration areas may experience material yielding, deformation, or even fracture, which will seriously affect the stability and safety of the structure.

[0048] Specifically, the bifurcated column support substructure is controlled to pause at the trajectory pause point where the curvature exceeds the preset value, providing the structure with an opportunity to redistribute and release stress. When the structure stops moving, the internal stress will gradually adjust in a relatively stable state and tend to be more evenly distributed, thereby reducing local stress peaks and reducing the risk of structural damage due to excessive stress. This process of stress release and redistribution helps to maintain the mechanical stability of the structure during the entire lifting and installation process and ensure construction safety.

[0049] Specifically, in the construction of bifurcated column support substructures in the category of strong and explicit synchronization difficulty, the present invention can effectively improve the construction accuracy by determining the point on the lifting and installation trajectory where the curvature exceeds the preset value as the trajectory pause point and controlling the substructure to pause. Since such substructures face complex situations caused by the different distances between the end face and the axis of the bifurcated column when splicing, the direction of structural movement changes dramatically at the point with larger trajectory curvature, which can easily cause internal splicing errors and lead to abnormal internal stress concentration. When the substructure moves on the lifting and installation trajectory, the point with large curvature means that the stress state of the structure changes complexly. If it continues to move rapidly, the structure may be partially damaged or even become unstable as a whole due to sudden stress changes. The pause during the movement can redistribute the stress in the structure during a short period of stillness and return to a more stable mechanical state. Furthermore, it realizes the screening of multi-dimensional information with data representation and integrates it into construction control, and scientifically plans splicing optimization strategies to improve the construction quality and efficiency of steel structure splicing construction.

[0050] Specifically, the method for determining the trajectory speed adjustment point is: The moving speeds corresponding to a plurality of points on the lifting installation trajectory are determined, and the points where the moving speed exceeds a preset moving speed screening value are determined as the trajectory speed regulating points.

[0051] In implementation, the velocity value of each trajectory point is pre-matched in the lifting and installation trajectory of the bifurcated column support substructure, and the average velocity value of several trajectory points can be pre-calculated.m Determine the preset moving speed screening value V0, V0=δ×V m , δ is the moving speed screening value factor, and the value range of δ is [0.5, 1]. The larger the value of δ is, the larger the value of the preset moving speed screening value V0 is, and the fewer the selected trajectory speed control points are. In order to avoid poor speed control effect caused by too few selected trajectory speed control points and excessive speed control caused by too many selected trajectory speed control points, preferably, the value of δ is 0.7.

[0052] Specifically, during the lifting process of the roof steel structure, the moving speed of the structure directly affects the magnitude of the inertial force it is subjected to. The faster the speed, the greater the inertial force. For the bifurcated column support substructure in the weakly dominant category of synchronization difficulty, although its overall force is relatively simple, the inertial force of the structure will increase significantly at the point where the speed exceeds the preset value on the lifting and installation trajectory. This large inertial force may cause additional stress inside the structure, especially at the connection parts and key nodes of the structure. The point where the moving speed exceeds the preset moving speed screening value is determined as the trajectory speed adjustment point and the speed is adjusted, which can effectively adjust the inertial force of the structure.

[0053] Specifically, for the bifurcated column supporting substructure of the weakly dominant category of synchronization difficulty, the present invention determines the point on the lifting and installation trajectory where the moving speed exceeds the preset value as the trajectory speed adjustment point and adjusts the speed, which can effectively improve the construction accuracy. Although the splicing difficulty of such substructures is relatively low, at the high-speed moving trajectory point, the structure may still produce positional deviation due to factors such as inertia. By adjusting the speed, the moving speed of the structure can be reduced, and the positional deviation caused by inertia can be reduced. Furthermore, it realizes the screening of multi-dimensional information with data representation and integrates it into construction control, and scientifically plans the splicing optimization strategy to improve the construction quality and efficiency of steel structure splicing construction.

[0054] Specifically, the pause duration of the bifurcated column support substructure at the track pause point and the deceleration amount of the bifurcated column support substructure at the track speed adjustment point are controlled according to the splicing anisotropy index, wherein: The pause duration is positively correlated with the structural anisotropy value, the deceleration amount is positively correlated with the structural anisotropy value, and the structural anisotropy value is the average value of the splicing anisotropy index of several anisotropic characteristic splicing end faces in the bifurcated column support substructure.

[0055] In implementation, the pause duration of the bifurcated column supporting substructure at the pause point of the trajectory is controlled according to the splicing anisotropy index. Exemplarily, the difference between the splicing anisotropy index r and the splicing anisotropy index threshold r0 can be pre-calculated, and the pause duration t=(r-r0)×P+t0, wherein P is the amplification factor, and t0 is the initial setting value of the pause duration. Here, a preferred value is provided, in which the amplification factor P=2 and the initial setting value of the pause duration t0=3s.

[0056] In implementation, the deceleration amount of the bifurcated column support substructure for speed regulation at the trajectory speed regulation point is controlled according to the splicing anisotropy index. For example, the difference between the splicing anisotropy index r and the splicing anisotropy index threshold r0 can be pre-calculated, and the deceleration amount V s = (r-r0) × P + V s0 , where P is the amplification factor, V s0 is the initial setting value of the deceleration amount. Here is a preferred value, the amplification factor P=2, the initial setting value of the deceleration amount V s0 =1m / s.

[0057] This embodiment also provides a computer-readable storage medium, in which a computer program code is stored. When the computer program code is run on a computer, the computer executes the above-mentioned related method steps to implement the high-precision synchronous splicing method of the roof steel structure supported by bifurcated columns provided in the above embodiment.

[0058] So far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

[0059] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A high-precision synchronous splicing method for a roof steel structure supported by a bifurcated column, characterized in that: include: Pre-acquire the splicing end face information of the roof frame and the bifurcated column in the bifurcated column supporting substructure, wherein the splicing end face information includes the end face area and the end face inclination angle of the splicing end face; Determine the splicing anisotropy component of each splicing end face based on the splicing end face information, and screen the anisotropic characteristic splicing end faces in the bifurcated column support substructure according to the splicing end face information and the splicing anisotropy index calculated from the splicing anisotropy component; Determine the synchronization difficulty category of the bifurcated column support substructure according to the analysis results of the spatial position distribution of several anisotropic characteristic splicing end faces, wherein the spatial position distribution is determined according to the position coordinates of the anisotropic characteristic splicing end faces; Acquire the pre-stored lifting and installation trajectory of each bifurcated column support substructure, and determine the movement optimization strategy of the bifurcated column support substructure along the lifting and installation trajectory based on the synchronization difficulty category; The movement optimization strategy is to determine a number of trajectory stopping points on the lifting and installation trajectory, control the bifurcated column support substructure to stop at the trajectory stopping points, or determine a number of trajectory speed adjustment points on the lifting and installation trajectory, control the bifurcated column support substructure to adjust the speed at the trajectory speed adjustment points.

2. The high-precision synchronous splicing method of a roof steel structure supported by a bifurcated column according to claim 1 is characterized in that: The process of determining the splicing heterogeneity component includes: Acquire the end face inclination angle in the splicing end face information; Determine the vector length of the component vector of the gravity unit vector along the spliced ​​end face based on the end face inclination angle; Determine the vector length as the splicing anisotropy component of the splicing end face; The end face inclination angle is the angle between the spliced ​​end face and the horizontal ground, and the vector direction of the gravity unit vector is the downward direction perpendicular to the horizontal ground.

3. The high-precision synchronous splicing method of a roof steel structure supported by bifurcated columns according to claim 2 is characterized in that: The splicing heterogeneity index is calculated as follows: Acquire the end face area from the splicing end face information of the splicing end face; The ratio of the splicing anisotropy component of the splicing end face to the end face area is calculated, and the ratio is dimensionless to obtain the splicing anisotropy index of the splicing end face.

4. The high-precision synchronous splicing method of a roof steel structure supported by bifurcated columns according to claim 3 is characterized in that: The process of screening the splicing end faces with different characteristics includes: According to the determination result that the splicing anisotropy index of the splicing end face satisfies the anisotropy screening condition, the splicing end face is screened as anisotropy characteristic splicing end face; According to the determination result that the splicing anisotropy index of the splicing end face does not satisfy the anisotropy screening condition, the splicing end face is not screened; Among them, the heterogeneity screening condition is that the splicing heterogeneity index exceeds a preset splicing heterogeneity index threshold.

5. The high-precision synchronous splicing method of a roof steel structure supported by bifurcated columns according to claim 4 is characterized in that: Determine the spatial distribution of several splicing end faces with different characteristics, including: Obtain the coordinates corresponding to the positions of the splicing end faces with various anisotropic features in the geodetic coordinate system; Determine a set of several heterogeneous characteristic splicing end faces with the same spatial height dimension according to the coordinates; The coordinates corresponding to the anisotropic feature splicing end faces are obtained in a single anisotropic feature splicing end face set, and the distance between the position of the anisotropic feature splicing end faces and the axis of the bifurcation column is determined according to the coordinates.

6. The high-precision synchronous splicing method of a roof steel structure supported by bifurcated columns according to claim 5 is characterized in that: The process of determining the synchronization difficulty category of the bifurcated column support substructure includes: If the distance between the position of the heterogeneous characteristic splicing end face in the heterogeneous characteristic splicing end face set and the axis of the bifurcated column is different, the synchronization difficulty category of the bifurcated column support substructure is determined to be a strong dominant synchronization difficulty category; If the distances between the positions of the anisotropic feature splicing end faces in the set of anisotropic feature splicing end faces and the axis of the bifurcated column are the same, then the synchronization difficulty category of the bifurcated column supporting substructure is determined to be a weakly dominant synchronization difficulty category.

7. The high-precision synchronous splicing method of a roof steel structure supported by bifurcated columns according to claim 6 is characterized in that: Determine your mobile optimization strategy, including: If the bifurcated column support substructure is a highly explicit category of synchronization difficulty, the movement optimization strategy is to determine a number of track pause points on the lifting installation track, and control the bifurcated column support substructure to pause at the track pause points; If the bifurcated column supporting substructure is of the weakly dominant category of synchronization difficulty, the movement optimization strategy is to determine a number of trajectory speed control points on the lifting installation trajectory, and control the bifurcated column supporting substructure to adjust the speed at the trajectory speed control points.

8. The high-precision synchronous splicing method of a roof steel structure supported by bifurcated columns according to claim 7 is characterized in that: The method for determining the stopping point of the trajectory is: The curvatures of several points on the lifting installation trajectory are determined, and the points where the curvature exceeds a preset curvature screening value are determined as the trajectory stop points.

9. The high-precision synchronous splicing method of a roof steel structure supported by bifurcated columns according to claim 7, characterized in that: The method for determining the trajectory speed adjustment point is: The moving speeds corresponding to a plurality of points on the lifting installation trajectory are determined, and the points where the moving speed exceeds a preset moving speed screening value are determined as the trajectory speed regulating points.

10. The high-precision synchronous splicing method of a roof steel structure supported by bifurcated columns according to claim 1, characterized in that: According to the splicing anisotropy index, the pause duration of the bifurcated column support substructure at the track pause point is controlled, and the deceleration amount of the bifurcated column support substructure at the track speed adjustment point is controlled, wherein: The pause duration is positively correlated with the structural anisotropy value, the deceleration amount is positively correlated with the structural anisotropy value, and the structural anisotropy value is the average value of the splicing anisotropy index of several anisotropic characteristic splicing end faces in the bifurcated column support substructure.

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