A stress analysis method and system for large-span lattice shell column deviation based on VR technology

Abstract

The present invention provides a stress analysis method and system for large-span lattice shell column deviation based on VR technology, which belongs to the field of building construction technology and includes the following steps: S1, using 3D3SV14 technology to establish a large-span lattice shell column model according to a construction plan, and using beam units to simulate reinforced steel columns and roof steel components; S2, using structural analysis software to analyze the stress analysis of large-span lattice shell column deviation; S3, importing the 3D3SV14 model and structural analysis results into VR software, and collecting the construction environment around the lattice shell structure; S4, using VR software to build a virtual scene of the lattice shell column model, and the staff can view and analyze the structural model in the virtual space through VR equipment, allowing the staff to adjust parameters in the VR environment. The problem that the stress condition of the lattice shell column deviation is not analyzed, resulting in the overall structural instability of the lattice shell structure and unclear deviation values ​​is solved.

Description

Technical Field

[0001] The present invention belongs to the technical field of building construction, and in particular, relates to a force analysis method and system for large-span lattice shell column deviation based on VR technology. Background Art

[0002] With the development of society and the rapid progress of construction technology, people's requirements for buildings are no longer just to meet the basic needs of survival and production, but have higher requirements for buildings, such as shape, space, and economy. As a relatively mature structural system, the single-layer grid shell is deeply favored by architects and structural engineers for its light and simple structural form, transparent and rhythmic architectural effect.

[0003] The lattice shell structure is a spatial structural system, which is a mesh structure mainly composed of rods and has good geometric stability and bearing capacity. When the column is displaced, it may affect the overall stability, bearing capacity and use function of the structure. In the prior art, there is no analysis of the stress condition of the displaced lattice shell column, which leads to the overall structural instability of the lattice shell structure and unclear displacement value. To this end, a stress analysis method and system for large-span lattice shell column displacement based on VR technology is designed to analyze the displacement of the lattice shell column, evaluate the ultimate bearing capacity after the displacement of the structure, and evaluate the safety of the structure after the displacement. Summary of the invention

[0004] The embodiment of the present invention provides a method and system for stress analysis of large-span lattice shell column deviation based on VR technology, which solves the problem that the stress condition of the lattice shell column deviation is not analyzed, resulting in the overall structural instability of the lattice shell structure and unclear deviation values.

[0005] In view of the above problems, the technical solution proposed by the present invention is:

[0006] The present invention provides a stress analysis method for large-span lattice shell column deviation based on VR technology, comprising the following steps:

[0007] S1, according to the construction plan, the 3D3SV14 technology was used to establish the large-span lattice shell column model, and the beam unit was used to simulate the reinforced steel column and roof steel components;

[0008] S2, using structural analysis software to analyze the stress analysis of the large-span lattice shell column deviation;

[0009] S3, import the 3D3SV14 model and structural analysis results into the VR software, and collect the construction environment around the lattice shell structure;

[0010] S4, using VR software to build a virtual scene of the lattice shell column model, the staff can view and analyze the structural model in the virtual space through VR equipment, allowing the staff to adjust parameters in the VR environment;

[0011] The step S2 specifically includes the following steps:

[0012] S21, 3D3SV14 and MIDASGEN software were used to analyze the overall structural dynamic characteristics of the upper steel structure;

[0013] S22, use 3D3SV14 to perform elastic stage review calculation and analysis on the upper steel structure;

[0014] S23, 3D3SV14 and MIDASGEN were used to conduct structural member bearing capacity review analysis on the upper steel structure;

[0015] S24, performance analysis of the single-layer grid structure of the roof was performed using 3D3SV14;

[0016] S25, MIDASGEN is used to check the bearing capacity of the offset column;

[0017] The step S4 specifically comprises the following steps:

[0018] S41, planning the stress position of the lattice shell structure in VR environment;

[0019] S42, creates a parametric structural model in which loads, boundary conditions and material properties can be modified in real time. When the staff adjusts the parameters in the VR environment, the system updates the response of the structural model in real time, simulates the displacement and changes of the force position, and uses animation and scripts to control the simulation process;

[0020] S43, in the VR environment, a real-time feedback mechanism is set up to display the results immediately when the staff adjusts the parameters;

[0021] S44, displays the analysis results in a visual form in the VR environment, so that the staff can intuitively understand the changes in the structure;

[0022] The system applied to the above method includes a force analysis module, a data management module, a staff interface module, a VR simulation module, an analysis engine module and a feedback and collection module. The force analysis module uses two different analysis software to analyze the force of the large-span lattice shell column displacement. The data management module is used to store and manage the database of structural models, load data, material properties and analysis results. The staff interface module is designed with an intuitive staff operation interface, including a menu, a toolbar and a control panel. The VR simulation module is used to display the simulation of structural force and deformation. The analysis engine module is used to calculate the force and deformation after the column is displaced. The feedback and collection module is used to collect staff feedback and perform system iteration and function optimization according to staff needs and suggestions.

[0023] As a preferred technical solution of the present invention, in step S21, the actual offset value is used as the initial geometric defect of the structure, and the influence of geometric nonlinearity on the overall ultimate bearing capacity of the structure is considered. 3D3SV14 and MIDASGEN are used to perform stability performance analysis on some large offset columns, and the structural dynamic characteristics analysis results of different software are compared. The RITZ vector method of the 3D3SV14 program is used for calculation, and the Lanczos eigenvector method of the MIDASGEN program is used for calculation. For comparative analysis, the overall torsional period ratio is less than 0.85s, and the modal mass participation coefficient of the first 15 vibration modes of the overall structure is greater than 90%.

[0024] As a preferred technical solution of the present invention, in step S22, based on the 3D3SV14 structural model, a static load analysis of the structure is carried out, a small earthquake response spectrum analysis is performed, and a static effect analysis of the overall structural model of the large-span lattice shell column is performed using 3D3SV14. The compressive components of the large-span lattice shell column are controlled according to an allowable slenderness ratio of 150 times, the stress ratio limit of the steel column is 0.75, and the stress ratio limit of the steel roof rod is 0.8.

[0025] As a preferred technical solution of the present invention, in step S24, beam units are used to simulate reinforced steel columns and roof steel components, the normal use limit state combination of 1.0 dead load and 1.0 live load is selected, 1.0 dead weight is selected as the linear stability calculation parameter, and the lowest-order buckling mode of the structure is used as the initial defect distribution mode, and its maximum calculated value is taken as 1 / 300 of the span of the lattice shell.

[0026] As a preferred technical solution of the present invention, in step S25, the bearing capacity of the offset column is checked according to the measured offset value of the roof support column, and x support columns with the largest relative offset between the column top and the column bottom are selected for stability analysis. For the selected x offset columns, buckling modal analysis is performed separately according to their most unfavorable stress state, that is, cantilever column state. During the calculation, two situations are compared, including the situation where the support column has no offset and the offset situation is input according to the actual offset value, and the calculation is performed using MIDASGEN software.

[0027] As a preferred technical solution of the present invention, in step S3, the construction environment around the grid shell structure is collected, including various construction stages and environmental conditions, a camera or sensor is used to collect the construction environment around the grid shell structure, and a laser scanner or a three-dimensional scanner is used to accurately scan the actual structure of the grid shell column to obtain its geometric shape and size, and the model in the VR environment is combined with the GIS system.

[0028] As a preferred technical solution of the present invention, the force analysis module includes a 3D3SV14 analysis unit and a MIDASGEN analysis unit, the 3D3SV14 analysis unit and the MIDASGEN analysis unit are 3D3SV14 software and MIDASGEN software, the 3D3SV14 analysis unit and the MIDASGEN analysis unit include an overall structural dynamic characteristics analysis subunit, an elastic stage verification subunit, a structural bearing capacity verification subunit, a roof grid structure performance analysis subunit and an eccentric column bearing capacity verification subunit.

[0029] As a preferred technical solution of the present invention, the VR simulation module includes an environment construction unit and a parameter adjustment unit. The environment construction unit uses VR software combined with the data of the eccentric stress analysis of the lattice shell column to build the VR environment. The parameter adjustment unit is used to adjust the parameters of the overall structure and observe the structural changes when the staff uses the VR simulation module to view the environment.

[0030] Compared with the prior art, the beneficial effects of the present invention are:

[0031] (1) The present invention uses software to simulate and analyze the large-span lattice shell column structure layout, judges the rationality of the structural layout, and uses the actual offset value as the initial geometric defect of the structure to analyze the structural bearing capacity, which can provide a reference for the analysis of the structure after displacement. By analyzing the dynamic characteristics of the overall structural model, it is shown that the structural vibration mode and period are basically reasonable, and the structural layout is relatively reasonable.

[0032] (2) The present invention analyzes the stability performance of the upper steel structure after considering the offset, takes the actual offset value as the initial geometric defect of the structure, and verifies the bearing capacity of the offset column. It is found that after considering the actual offset, the bearing capacity of the support column itself can meet the use requirements of the existing structure under various adverse load conditions.

[0033] (3) The present invention utilizes VR technology to provide an immersive experience. Workers can interact with objects and elements in the virtual environment and perceive the spatial size and distance of the virtual environment, which helps workers better understand building layout, product design and space planning. VR technology is used for intuitive 3D visualization, enabling workers to better understand data.

[0034] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention, it can be implemented according to the contents of the specification. In order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is a flow chart of a force analysis method for large-span lattice shell column deviation based on VR technology disclosed in the present invention;

[0036] Figure 2 It is a flow chart of step S4 of a stress analysis method for large-span lattice shell column deviation based on VR technology disclosed in the present invention;

[0037] Figure 3 It is a block diagram of a force analysis system for large-span lattice shell column deviation based on VR technology disclosed in the present invention;

[0038] Figure 4 It is a schematic diagram of a roof support column assumption of a force analysis method for large-span lattice shell column deviation based on VR technology disclosed in the present invention;

[0039] Explanation of the reference numerals: 100, force analysis module; 101, 3D3SV14 analysis unit; 1011, overall structural dynamic characteristics analysis subunit; 1012, elastic stage verification subunit; 1013, structural bearing capacity verification subunit; 1014, roof network structure performance analysis subunit; 1015, offset column bearing capacity verification subunit; 102, MIDASGEN analysis unit; 200, data management module; 300, staff interface module; 400, VR simulation module; 401, environment construction unit; 402, parameter adjustment unit; 500, analysis engine module; 600, feedback and collection module. DETAILED DESCRIPTION

[0040] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0041] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0042] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0043] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0044] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0045] Embodiment 1

[0046] Refer to the attached Figure 1-3 As shown, the present invention provides a technical solution: a stress analysis method for large-span lattice shell column deviation based on VR technology, comprising the following steps:

[0047] S1, according to the construction plan, the 3D3SV14 technology was used to establish the large-span lattice shell column model, and the beam unit was used to simulate the reinforced steel column and roof steel components;

[0048] S2, using structural analysis software to analyze the stress analysis of the large-span lattice shell column deviation;

[0049] S3, import the 3D3SV14 model and structural analysis results into the VR software, and collect the construction environment around the lattice shell structure;

[0050] S4, using VR software to build a virtual scene of the lattice shell column model, the staff can view and analyze the structural model in the virtual space through VR equipment, allowing the staff to adjust parameters (such as loads, boundary conditions, material properties, etc.) in the VR environment and observe the structural response in real time;

[0051] Step S2 specifically includes the following steps:

[0052] S21, 3D3SV14 and MIDASGEN software were used to analyze the overall structural dynamic characteristics of the upper steel structure;

[0053] S22, use 3D3SV14 to perform elastic stage review calculation and analysis on the upper steel structure;

[0054] S23, 3D3SV14 and MIDASGEN were used to conduct structural member bearing capacity review analysis on the upper steel structure;

[0055] S24, performance analysis of the single-layer grid structure of the roof was performed using 3D3SV14;

[0056] S25, MIDASGEN is used to check the bearing capacity of the offset column;

[0057] Step S4 specifically includes the following steps:

[0058] S41, planning the stress position of the lattice shell structure in VR environment;

[0059] S42, create a parametric structural model in which loads, boundary conditions and material properties can be modified in real time. When the staff adjusts the parameters in the VR environment, the system updates the response of the structural model in real time, such as stress, displacement, etc., to ensure that the parameter adjustment can be immediately reflected in the VR environment, such as by changing the color or size of the object to indicate the increase in load. Integrate finite element analysis (FEA) software or a custom calculation engine to calculate the structural response in real time in the VR environment, simulate the displacement and change of the force position, and use animation and scripts to control the simulation process;

[0060] S43, in the VR environment, set up a real-time feedback mechanism, when the staff adjust the parameters, the results are immediately displayed, support multi-staff collaboration, so that other members can work and discuss together in the virtual environment, and improve the efficiency of team collaboration;

[0061] S44, the analysis results are displayed in a visual form in the VR environment, so that the staff can intuitively understand the changes in the structure. The staff can observe the structural model and analysis results from different perspectives in the VR environment;

[0062] The system applied to the above method includes a force analysis module 100, a data management module 200, a staff interface module 300, a VR simulation module 400, an analysis engine module 500 and a feedback and collection module 600. The force analysis module 100 uses two different analysis software to analyze the force of the large-span lattice shell column deviation. The data management module 200 is used to store and manage the database of structural models, load data, material properties and analysis results, and designs a data input and output interface to import model data from other software. The staff interface module 300 designs an intuitive staff operation interface, including a menu , toolbars and control panels to achieve interactive control of the VR helmet and handle, such as selecting, moving, rotating and scaling the model. The VR simulation module 400 is used to display the simulation of structural stress and deformation, and to achieve visualization effects such as displacement cloud maps and stress distribution maps to intuitively display the analysis results. The analysis engine module 500 integrates or develops a finite element analysis engine to calculate the stress and deformation of the column after displacement, and to achieve real-time calculation functions so that the staff can immediately see the structural response after adjusting the parameters. The feedback and collection module 600 is used to collect feedback from the staff and perform system iteration and function optimization according to the staff's needs and suggestions.

[0063] The embodiment of the present invention is also implemented through the following technical solutions.

[0064] In the embodiment of the present invention, the actual offset value is used as the initial geometric defect of the structure in step S21, and the influence of geometric nonlinearity on the overall ultimate bearing capacity of the structure is considered. 3D3SV14 and MIDASGEN are used to analyze the stability performance of some large offset columns, and the structural dynamic characteristics analysis results of different software are compared. The RITZ vector method of the 3D3SV14 program is used for calculation, and the Lanczos eigenvector method of the MIDASGEN program is used for calculation. For comparative analysis, the overall torsional period ratio is less than 0.85s, and the modal mass participation coefficient of the first 15 levels of vibration modes of the overall structure is greater than 90%. As shown in the following table:

[0065] Table 1 Structural dynamic analysis table

[0066]

[0067] In the embodiment of the present invention, in step S22, based on the 3D3SV14 structural model, the static load analysis of the structure is carried out, and the small earthquake response spectrum analysis is carried out to reveal the stress and deformation characteristics and mechanism of the structure. The static effect analysis of the overall structural model of the large-span lattice shell column is carried out by using 3D3SV14. The analysis working conditions include constant, active, wind, and temperature. According to the relevant requirements of the "Technical Code for Spatial Grid Structures", the temperature load is considered, and the stress ratio and bearing capacity of the original design steel structure components are verified by using 3D3SV14 and MIDASGEN. The compression components of the large-span lattice shell column are controlled according to the allowable slenderness ratio of 150 times, the stress ratio limit of the steel column is 0.75, and the stress ratio limit of the steel roof rod is 0.8. The bearing capacity of the original design components is verified by using 3D3SV143S and MIDASGEN. The results show that:

[0068] (1) The bearing capacity of the components of the original model was reviewed by considering the most unfavorable snow load and temperature load. The bearing capacity verification of the components of the original overall structure basically met the requirements of the specification;

[0069] (2) The maximum stress ratio of the roof support column is 0.72, and the maximum stable stress ratio is 0.68, which means there is a certain safety reserve of bearing capacity.

[0070] In addition, it is assumed that the overall structural model has passed the component bearing capacity, stability and stiffness verification. The analysis results show that:

[0071] A. The horizontal deformation of the column top of the overall structure under constant and active action is within a reasonable range, the deformation is appropriate, and it has sufficient rigidity;

[0072] B. The internal force distribution of the roof structure is relatively uniform overall, but the internal force of some components is relatively large;

[0073] C. The temperature effect on the roof structure is not significant, but the temperature effect has a certain influence on the bending moment at the base of the column.

[0074] In an embodiment of the present invention, in step S24, beam units are used to simulate reinforced steel columns and roof steel components, the bending moment released at the ends of the rods at the roof truss support is considered, the normal use limit state combination of 1.0 dead load and 1.0 live load is selected, the linear stability calculation parameter is selected as 1.0 dead weight, and the lowest-order buckling mode of the structure is used as the initial defect distribution mode, and its maximum calculated value is taken as 1 / 300 of the lattice shell span.

[0075] In addition, in structural engineering, the linear stability coefficient (or stability coefficient) is often used to evaluate the stability of a structure under a specific load combination. For a large-span lattice shell structure, the calculation formula of the linear stability coefficient can be expressed as:

[0076] ;

[0077] in, The linear stability factor, which indicates the stability of the structure under the considered load combination, is the critical load of the structure, that is, the maximum load that the structure can withstand before losing stability. is the load applied to the structure, including dead load and live load. If the linear stability factor is greater than 1, which means that the applied load does not reach a level that causes the structure to become unstable. The structure is stable under this load combination. Less than or equal to 1, which may mean that the structure is at risk of instability under this load combination and requires further analysis and design optimization.

[0078] In addition, the full process analysis of structural load displacement based on nonlinear finite element analysis can clearly show the entire process of changes in structural strength, stability and even stiffness. Therefore, the stability of the structure can be studied in a more precise sense. The consistent defect mode method is essentially to scale the lowest-order buckling mode of the structure according to a certain ratio as the initial defect of the structure to calculate the full process nonlinear ultimate bearing capacity.

[0079] The theoretical assumption is that the buckling mode corresponding to the lowest critical point of the structure is the lowest buckling mode of the structure. The structure will be in a state of minimum potential energy when deformed according to this mode. For actual structures, there is a tendency to deform along this mode in the initial stage of loading. Therefore, it is believed that if the defect distribution pattern of the structure coincides with the lowest buckling mode, this will have the most adverse effect on the stress performance of the structure. The Technical Code for Grid Shell Structures (JGJ61-2003) stipulates that the influence of the installation deviation of the initial curved surface shape should be considered when conducting a full-process analysis of the grid shell. Therefore, the lowest-order buckling mode of the structure can be used as the initial defect distribution mode.

[0080] In the embodiment of the present invention, in step S25, the bearing capacity of the offset column is checked. According to the measured offset value of the roof support column, x support columns with the largest relative offset between the top and bottom of the column are selected for stability analysis. The selected x offset columns are subjected to a buckling modal analysis according to their most unfavorable stress state, i.e., cantilever column state. Two situations are compared during the calculation, including the situation where the support column has no offset and the situation where the offset is input according to the actual offset value, and the calculation is performed using MIDASGEN software.

[0081] Assume that 5 supporting columns with the largest relative displacement between the top and bottom of the column are selected for stability analysis, such as Figure 4As shown in the figure, the column numbers are 2, 14, 23, 25 and 29. The five offset columns are selected and calculated and compared. By calculating the buckling mode of each support column according to the cantilever state, the buckling critical load of each support column can be further obtained. By comparing it with the constant and live column top load value of the overall structure, the stability of the support column can be roughly obtained, as shown in the following table:

[0082] Table 3 shows the analytical data of the assumed bearing capacity of the offset column

[0083] Column number Critical load of cantilever column without deflection Perl(KN) Cantilever column with offset critical load Pcr2(KN) Standard value of column top constant + active working condition D+L (KN) Pcr2 / Perl Pcr2 / D+L 2 4268 3884 829 0.91 4.80 14 5770 5383 866 0.93 6.22 23 5062 4721 787 0.93 6.00 25 3434 3159 704 0.92 4.55 29 3587 3300 596 0.92 5.61

[0084] It can be seen from the above table that the critical buckling load of the offset column calculated according to the cantilever column state is not much different between the results with and without considering the offset, and even if the offset support column is calculated according to the most unfavorable cantilever column state, it can meet the stability requirements under the original design load state. The critical load of each support column is determined by the overall structural buckling modal analysis after considering the actual column offset in the previous article, and then the column calculation length is reversed through the Euler formula to determine the support column calculation length coefficient.

[0085] In an embodiment of the present invention, in step S3, the construction environment around the grid shell structure is collected, including various construction stages and environmental conditions, such as construction scenes under different weather conditions, sites with different construction progress, etc. The construction environment around the grid shell structure is collected using a camera or a sensor, and the actual structure of the grid shell column is accurately scanned using a laser scanner or a three-dimensional scanner to obtain its geometric shape and size. The model in the VR environment is combined with the GIS system to improve the geographic location accuracy of the model, and then the Internet of Things technology is used to synchronize the data of the actual structure (such as displacement, stress, etc.) to the VR environment in real time.

[0086] In addition, considering the overall stability analysis of the structure after displacement, MIDASGEN and 3D3SV143S software were used to conduct nonlinear overall stability analysis of the overall structure considering the actual column displacement. The actual displacement value was taken as the initial geometric defect of the structure, and the influence of geometric nonlinearity on the overall stability ultimate bearing capacity of the structure was considered. On the basis of the linear overall analysis model, according to Article 4.3.3 of the Technical Code for Spatial Grid Structures (JGJ7-2010), the influence of initial geometric defects (i.e., installation deviation of the initial curved surface shape) was considered when conducting the full process analysis of the lattice shell. The distribution of initial geometric defects was adopted. Using the lowest-order buckling mode of the structure, in accordance with the provisions of Article 4.3.4 of the Technical Code for Grid Shell Structures (JGJ7-2010), when considering geometric nonlinearity, the load value at the first critical point obtained by the full process analysis of the grid shell structure is used as the ultimate bearing capacity of the grid shell. After dividing the ultimate bearing capacity by the coefficient K, it is the allowable bearing capacity (standard value) determined by the stability of the grid shell. The coefficient K can be taken as 4.2. According to the results of the characteristic value buckling analysis of the structure and the results of the force characteristics and section verification, this nonlinear buckling analysis selects 8 groups of load condition combinations as analysis conditions. The 8 load condition combinations are shown in the following table:

[0087] Table 2 shows the contents of 8 load condition combinations

[0088] Analysis condition number Analyze the specific combination of working conditions 1 1.3 constant + 1.5 active 1 + 0.9 positive X wind 2 1.3 Constant + 1.5 Active 1 + 0.9 Reverse X Wind 3 1.3 constant + 1.5 active 1 + 0.9 positive Y wind 4 1.3 Constant + 1.5 Active 1 + 0.9 Reverse Y Wind 5 1.3 constant + 1.05 active 1 + 1.5 positive X wind 6 1.3 Constant + 1.05 Active 1 + 1.5 Reverse X Wind 7 1.3 constant + 1.05 active 1 + 1.5 positive Y wind 8 1.3 Constant + 1.05 Active 1 + 1.5 Reverse Y Wind

[0089] In an embodiment of the present invention, the force analysis module 100 includes a 3D3SV14 analysis unit 101 and a MIDASGEN analysis unit 102, the 3D3SV14 analysis unit 101 and the MIDASGEN analysis unit 102 are 3D3SV14 software and MIDASGEN software, the 3D3SV14 analysis unit 101 and the MIDASGEN analysis unit 102 include an overall structural dynamic characteristics analysis subunit 1011, an elastic stage verification subunit 1012, a structural bearing capacity verification subunit 1013, a roof grid structure performance analysis subunit and an offset column bearing capacity verification subunit 1015, each subunit corresponds to steps S21-S25 of the analysis method in sequence to realize the structural analysis of large-span lattice shell columns.

[0090] In an embodiment of the present invention, the VR simulation module 400 includes an environment construction unit 401 and a parameter adjustment unit 402. The environment construction unit 401 uses VR software combined with the data of the eccentric stress analysis of the lattice shell column to build the VR environment. The parameter adjustment unit 402 is used to adjust the parameters of the overall structure and observe the structural changes when the staff uses the VR simulation module 400 to view the environment.

[0091] The above are only preferred embodiments of the present invention and are 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.

[0092] In the above detailed description, various features are grouped together in a single embodiment to simplify the disclosure. This method of disclosure should not be interpreted as reflecting an intention that the embodiments of the claimed subject matter require more features than are clearly stated in each claim. On the contrary, as reflected in the appended claims, the invention is in a state of having less than all the features of the disclosed individual embodiments. Therefore, the appended claims are hereby expressly incorporated into the detailed description, with each claim standing on its own as a separate preferred embodiment of the invention.

[0093] Those skilled in the art will also appreciate that the various illustrative logic blocks, modules, circuits, and algorithmic steps described in conjunction with the embodiments herein can all be implemented as electronic hardware, computer software, or a combination thereof. In order to clearly illustrate the interchangeability between hardware and software, various illustrative components, blocks, modules, circuits, and steps are generally described above around their functions. Whether such functions are implemented as hardware or software depends on specific applications and the design constraints imposed on the entire system. A skilled person can implement the described functions in an alternative manner for each specific application, but such implementation decisions should not be interpreted as departing from the scope of protection of the present disclosure.

Claims

1. A stress analysis system for large-span lattice shell column deviation based on VR technology, characterized in that: The system comprises a stress analysis module (100), a data management module (200), a staff interface module (300), a VR simulation module (400), an analysis engine module (500) and a feedback and collection module (600), wherein the stress analysis module (100) uses two different analysis software to analyze the stress of a large-span lattice shell column displacement, the data management module (200) is used to store and manage a database of structural models, load data, material properties and analysis results, the staff interface module (300) is designed with an intuitive staff operation interface, including a menu, a tool bar and a control panel, the VR simulation module (400) is used to display the simulation of structural stress and deformation, the analysis engine module (500) is used to calculate the stress and deformation after the column displacement, and the feedback and collection module (600) is used to collect staff feedback and perform system iteration and function optimization according to staff needs and suggestions; The specific implementation steps of the above system include: S1, according to the construction plan, the 3D3SV14 technology was used to establish the large-span lattice shell column model, and the beam unit was used to simulate the reinforced steel column and roof steel components; S2, using structural analysis software to analyze the stress analysis of the large-span lattice shell column deviation; S3, import the 3D3SV14 model and structural analysis results into the VR software, and collect the construction environment around the lattice shell structure; S4, using VR software to build a virtual scene of the lattice shell column model, the staff can view and analyze the structural model in the virtual space through VR equipment, allowing the staff to adjust parameters in the VR environment; The step S2 specifically includes the following steps: S21, 3D3SV14 and MIDASGEN software were used to analyze the overall structural dynamic characteristics of the upper steel structure; S22, use 3D3SV14 to perform elastic stage review calculation and analysis on the upper steel structure; S23, 3D3SV14 and MIDASGEN were used to conduct structural member bearing capacity review analysis on the upper steel structure; S24, performance analysis of the single-layer grid structure of the roof was performed using 3D3SV14; S25, MIDASGEN is used to check the bearing capacity of the offset column; The step S4 specifically comprises the following steps: S41, planning the stress position of the lattice shell structure in VR environment; S42, creates a parametric structural model in which loads, boundary conditions and material properties can be modified in real time. When the staff adjusts the parameters in the VR environment, the system updates the response of the structural model in real time, simulates the displacement and changes of the force position, and uses animation and scripts to control the simulation process; S43, in the VR environment, a real-time feedback mechanism is set up to display the results immediately when the staff adjusts the parameters; S44, displays the analysis results in a visual form in the VR environment, so that the staff can intuitively understand the changes in the structure.

2. According to claim 1, a stress analysis system for large-span lattice shell column deviation based on VR technology is characterized in that: In the step S21, the actual offset value is used as the initial geometric defect of the structure, and the influence of geometric nonlinearity on the overall ultimate bearing capacity of the structure is considered. 3D3SV14 and MIDASGEN are used to analyze the stability performance of some large offset columns, and the structural dynamic characteristics analysis results of different software are compared. The RITZ vector method of the 3D3SV14 program is used for calculation, and the Lanczos eigenvector method of the MIDASGEN program is used for calculation. For comparative analysis, the requirement that the overall torsional period ratio is less than 0.85s, and the modal mass participation coefficient of the first 15 vibration modes of the overall structure is greater than 90%.

3. According to claim 1, a stress analysis system for large-span lattice shell column deviation based on VR technology is characterized in that: In step S22, based on the 3D3SV14 structural model, the static load analysis of the structure is carried out, the small earthquake response spectrum analysis is performed, and the static effect analysis of the overall structural model of the large-span lattice shell column is carried out using 3D3SV14. The compressive components of the large-span lattice shell column are controlled according to the allowable slenderness ratio of 150 times, the stress ratio limit of the steel column is 0.75, and the stress ratio limit of the steel roof rod is 0.

8.

4. According to claim 1, a stress analysis system for large-span lattice shell column deviation based on VR technology is characterized in that: In step S24, beam units are used to simulate reinforced steel columns and roof steel components, and the normal use limit state combination of 1.0 dead load and 1.0 live load is selected. The linear stability calculation parameter is selected as 1.0 dead weight, and the lowest-order buckling mode of the structure is used as the initial defect distribution mode. The maximum calculated value is taken as 1 / 300 of the span of the lattice shell.

5. According to the VR technology-based stress analysis system for large-span lattice shell column deviation according to claim 1, it is characterized in that: In step S25, the bearing capacity of the offset columns is checked according to the measured offset values ​​of the roof support columns, and x support columns with the largest relative offsets between the top and bottom of the columns are selected for stability analysis. For the selected x offset columns, buckling modal analysis is performed separately according to their most unfavorable stress state, that is, cantilever column state. The calculation is divided into two cases for comparison, including the case where the support columns have no offset and the case where the offset is input according to the actual offset value, and the calculation is performed using MIDASGEN software.

6. According to claim 1, a stress analysis system for large-span lattice shell column deviation based on VR technology is characterized in that: In the step S3, the construction environment around the grid shell structure is collected, including various construction stages and environmental conditions. The construction environment around the grid shell structure is collected using a camera or sensor, and the actual structure of the grid shell column is accurately scanned using a laser scanner or a three-dimensional scanner to obtain its geometric shape and size, and the model in the VR environment is combined with the GIS system.

7. The stress analysis system for large-span lattice shell column deviation based on VR technology according to claim 1 is characterized in that: The force analysis module (100) comprises a 3D3SV14 analysis unit (101) and a MIDASGEN analysis unit (102), wherein the 3D3SV14 analysis unit (101) and the MIDASGEN analysis unit (102) are 3D3SV14 software and MIDASGEN software, respectively, and the 3D3SV14 analysis unit (101) and the MIDASGEN analysis unit (102) comprise an overall structure dynamic characteristic analysis subunit (1011), an elastic stage verification subunit (1012), a structure bearing capacity verification subunit (1013), a roof grid structure performance analysis subunit and an offset column bearing capacity verification subunit (1015).

8. The stress analysis system for large-span lattice shell column deviation based on VR technology according to claim 1 is characterized in that: The VR simulation module (400) comprises an environment construction unit (401) and a parameter adjustment unit (402). The environment construction unit (401) uses VR software in combination with data of eccentric stress analysis of lattice shell columns to construct a VR environment. The parameter adjustment unit (402) is used to adjust parameters of the overall structure and observe structural changes when a staff member uses the VR simulation module (400) to view the environment.

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