Load simulation and optimization method and system for underground garage support system

Abstract

The present application relates to the field of building structure mechanics analysis, in particular to a load simulation and optimization method and system for an underground garage support system, wherein according to geological structure, the constraint conditions of the underground garage are set to select a component set suitable for the support system from a BIM library; according to the component set, a support system BIM model is established to determine key nodes; according to dynamic mechanical data of the underground garage, load data is generated; according to the load data, load transmission characteristics of the key nodes are determined; according to the load transmission characteristics, deformation parameters of associated components are determined; according to the deformation parameters, potential risks of the support system are estimated to adjust the component configuration of the BIM model. By setting the constraint conditions associated with the geological structure, the present application establishes a support system BIM model, simulates local load difference conditions of the support system, finds components with potential risks, and adjusts and optimizes the component configuration to improve load bearing balance and structural safety of the support system.

Description

Technical Field

[0001] This invention relates to the field of structural mechanics analysis, and in particular to a method and system for load simulation and optimization of underground parking garage support systems. Background Technology

[0002] The widespread use of automobiles has directly led to an increased demand for underground parking garages. As large underground spaces, underground parking garages employ a mixed support structure composed of columns, beams, and slabs. Underground parking garages are affected by both the settlement of their own foundation pit and the dynamic vibrations generated by traffic on the surface. Different components within the garage experience varying deformation states, leading to localized structural defects and compromising the overall structural safety and the ability to withstand stress deformation within acceptable limits.

[0003] Current technologies for underground parking garages are typically limited to structural monitoring, specifically the pre-installation of sensors such as fiber optic gratings during construction to achieve real-time monitoring throughout the garage's lifecycle, helping to promptly identify potential structural problems. The support system of an underground parking garage experiences varying loads under different geographical locations and traffic flow scenarios. The design phase must fully consider the differences in loads applied to different components within the support system. However, current underground parking garage designs do not address the varying local load-bearing capacities of the support system or implement component-specific design, thus reducing the structural safety and stability of the support system. Therefore, how to conduct differentiated dynamic simulation analysis of different components to address the spatial differences in load-bearing capacity of the underground parking garage support system is of great significance for improving the overall load-bearing balance and structural safety of the support system. Summary of the Invention

[0004] Current underground parking garage construction focuses on real-time structural monitoring throughout its entire lifecycle, but fails to address the spatial differences in load-bearing capacity of the support system during the design phase. This lack of differentiated simulation analysis for different components of the support system makes it impossible to ensure load-bearing balance and structural stability. This invention provides a method for load simulation and optimization of underground parking garage support systems, comprising the following steps:

[0005] S100: Based on the geological structure, set the constraints for the underground parking garage; based on the constraints, select a set of components suitable for the support system from the BIM library;

[0006] S200: Based on the aforementioned component set, establish a BIM model of the support system and determine key nodes from it; generate load data based on the dynamic mechanical data of the underground parking garage;

[0007] S300: Based on the load data, determine the load transfer characteristics of the key node; based on the load transfer characteristics, determine the deformation parameters of the associated components;

[0008] S400: Estimate the potential risks of the support system based on the deformation parameters; adjust the component configuration of the BIM model based on the layout of the potential risks.

[0009] Preferably, in S100, constraints for the underground parking garage are set based on the geological structure; based on the constraints, a set of components suitable for the support system is selected from the BIM library, specifically:

[0010] Obtain the geological structural parameters of the foundation pit where the underground parking garage is located; determine the potential spatial variations of the foundation pit based on the geological structural parameters;

[0011] Based on the potential spatial changes, structural dynamic constraints for the underground parking garage are set; wherein, the structural dynamic constraints include the stress distribution generated by the spatial deformation of the foundation pit on the underground parking garage;

[0012] Based on the stress distribution, estimate the upper limit of stress in the foundation pit; based on the upper limit of stress, the stress resistance labels of components in the BIM library, and the component composition requirements of the underground parking garage support system, select a set of components suitable for the support system from the BIM library.

[0013] Preferably, in S200, a BIM model of the support system is established based on the component set, and key nodes are determined from it; load data is generated based on the dynamic mechanical data of the underground parking garage, specifically:

[0014] Based on the component attribute tags of the component set, an auxiliary reinforcement tag is generated; wherein, the component attribute tags include component type and component size; the auxiliary reinforcement tag includes the deployment location and size of the stiffeners of the component;

[0015] Based on the component set and the attached reinforcement labels, a BIM model of the support system is established; the load-bearing capacity of the connection nodes corresponding to different components in the BIM model is obtained, and a portion of the connection nodes are identified as key nodes.

[0016] Historical traffic flow data corresponding to the underground parking garage is collected, and dynamic vibration data caused by the traffic flow is extracted from it; based on the dynamic vibration data, the expected load data of the underground parking garage is generated; wherein, the load data includes the vibration load applied to the underground parking garage during the movement of traffic.

[0017] Preferably, in S300, the load transfer characteristics of the key node are determined based on the load data; the deformation parameters of the associated components are determined based on the load transfer characteristics, specifically:

[0018] The load data is mapped to the BIM model to obtain the load distribution on the corresponding structural surfaces of the BIM model;

[0019] Based on the load distribution, a finite element analysis is performed on the BIM model to determine the load transfer characteristics of the key nodes; wherein, the load transfer characteristics include the load components transferred to each associated component connected to the key node.

[0020] Based on the spatial vector of the load component and the structural characteristics of the associated component, the deformation parameters of the associated component are determined; wherein, the deformation parameters include the deformation direction and deformation amplitude in three-dimensional space.

[0021] Preferably, in S400, the potential risks of the support system are estimated based on the deformation parameters; and the component configuration of the BIM model is adjusted according to the layout of the potential risks, specifically as follows:

[0022] Based on the deformation parameters, the three-dimensional shear stress of the associated component is determined; the change of the three-dimensional shear stress is predicted, and the potential risk of the support system is estimated.

[0023] Obtain the shear resistance characteristics of the component corresponding to the potential risk, and adjust the component configuration parameters of the BIM model according to the shear resistance characteristics and the three-dimensional shear internal stress limit characteristics of the component; wherein, the component configuration parameters include the size and / or shape of the component.

[0024] As another alternative embodiment of the above S400, it may be:

[0025] S400: Based on the deformation parameters, estimate the potential risks caused by changes in internal stress in the support system; based on the stress resistance properties of the relevant components of the potential risks, adjust the structural configuration parameters of the relevant components.

[0026] Preferably, in S400, based on the deformation parameters, the potential risks caused by changes in internal stress in the support system are estimated; based on the stress resistance properties of the relevant components related to the potential risks, the structural configuration parameters of the relevant components are adjusted, specifically as follows:

[0027] Based on the deformation parameters, the three-dimensional shear stress of the associated component is determined; the change of the three-dimensional shear stress is predicted to determine whether the three-dimensional shear stress will reach a preset critical threshold, thereby estimating the potential risks caused by the change of the three-dimensional shear stress in the support system;

[0028] Obtain the shear resistance characteristics of the relevant components with potential risks, and adjust the size and / or shape of the relevant components based on the shear resistance characteristics and the three-dimensional shear internal stress limit characteristics of the relevant components.

[0029] On the other hand, the present invention provides a load simulation and optimization system for underground parking garage support systems, the system comprising the following modules:

[0030] The component selection module is used to set constraints for the underground parking garage based on the geological structure; and to select a set of components suitable for the support system from the BIM library based on the constraints.

[0031] The BIM model building module is used to build a support system BIM model based on the component set and to determine key nodes therefrom.

[0032] The load data generation module is used to generate load data based on the dynamic mechanical data of the underground parking garage.

[0033] The load transfer determination module is used to determine the load transfer characteristics of the key node based on the load data.

[0034] The deformation determination module is used to determine the deformation parameters of the associated components based on the load transfer characteristics.

[0035] The risk estimation module is used to estimate the potential risks of the support system based on the deformation parameters.

[0036] The component configuration adjustment module is used to adjust the component configuration of the BIM model according to the layout of the potential risks.

[0037] Preferably, the component selection module is used to set constraints for the underground parking garage based on the geological structure; and to select a set of components suitable for the support system from the BIM library based on the constraints, specifically:

[0038] Obtain the geological structural parameters of the foundation pit where the underground parking garage is located; determine the potential spatial variations of the foundation pit based on the geological structural parameters;

[0039] Based on the potential spatial changes, structural dynamic constraints for the underground parking garage are set; wherein, the structural dynamic constraints include the stress distribution generated by the spatial deformation of the foundation pit on the underground parking garage;

[0040] Based on the stress distribution, estimate the upper limit of stress in the foundation pit; based on the upper limit of stress, the stress resistance labels of components in the BIM library, and the component composition requirements of the underground parking garage support system, select a set of components suitable for the support system from the BIM library.

[0041] Preferably, the BIM model building module is used to build a support system BIM model based on the component set, and to determine key nodes therefrom, specifically:

[0042] Based on the component attribute tags of the component set, an auxiliary reinforcement tag is generated; wherein, the component attribute tags include component type and component size; the auxiliary reinforcement tag includes the deployment location and size of the stiffeners of the component;

[0043] Based on the component set and the attached reinforcement labels, a BIM model of the support system is established; the load-bearing capacity of the connection nodes corresponding to different components in the BIM model is obtained, and a portion of the connection nodes are identified as key nodes.

[0044] The load data generation module is used to generate load data based on the dynamic mechanical data of the underground parking garage, specifically:

[0045] Historical traffic flow data corresponding to the underground parking garage is collected, and dynamic vibration data caused by the traffic flow is extracted from it; based on the dynamic vibration data, the expected load data of the underground parking garage is generated; wherein, the load data includes the vibration load applied to the underground parking garage during the movement of traffic.

[0046] Preferably, the load transfer determination module is used to determine the load transfer characteristics of the key node based on the load data, specifically as follows:

[0047] The load data is mapped to the BIM model to obtain the load distribution on the corresponding structural surfaces of the BIM model;

[0048] Based on the load distribution, a finite element analysis is performed on the BIM model to determine the load transfer characteristics of the key nodes; wherein, the load transfer characteristics include the load components transferred to each associated component connected to the key node.

[0049] The deformation determination module is used to determine the deformation parameters of the associated components based on the load transfer characteristics, specifically:

[0050] Based on the spatial vector of the load component and the structural characteristics of the associated component, the deformation parameters of the associated component are determined; wherein, the deformation parameters include the deformation direction and deformation amplitude in three-dimensional space.

[0051] Preferably, the risk estimation module is used to estimate the potential risk of the support system based on the deformation parameters, specifically:

[0052] Based on the deformation parameters, the three-dimensional shear stress of the associated component is determined; the change of the three-dimensional shear stress is predicted, and the potential risk of the support system is estimated.

[0053] The component configuration adjustment module is used to adjust the component configuration of the BIM model according to the layout of the potential risks, specifically as follows:

[0054] Obtain the shear resistance characteristics of the component corresponding to the potential risk, and adjust the component configuration parameters of the BIM model according to the shear resistance characteristics and the three-dimensional shear internal stress limit characteristics of the component; wherein, the component configuration parameters include the size and / or shape of the component.

[0055] As another alternative embodiment of the risk estimation module and the component configuration adjustment module, it may be:

[0056] The risk estimation module is used to estimate the potential risks caused by changes in internal stress in the support system based on the deformation parameters.

[0057] The component configuration adjustment module is used to adjust the structural configuration parameters of the relevant components based on the stress resistance properties of the relevant components with potential risks.

[0058] Preferably, the risk estimation module is used to estimate the potential risks caused by changes in internal stress in the support system based on the deformation parameters, specifically:

[0059] Based on the deformation parameters, the three-dimensional shear stress of the associated component is determined; the change of the three-dimensional shear stress is predicted to determine whether the three-dimensional shear stress will reach a preset critical threshold, thereby estimating the potential risks caused by the change of the three-dimensional shear stress in the support system;

[0060] The component configuration adjustment module is used to adjust the structural configuration parameters of the relevant components according to the stress resistance properties of the relevant components with potential risks, specifically:

[0061] Obtain the shear resistance characteristics of the relevant components with potential risks, and adjust the size and / or shape of the relevant components based on the shear resistance characteristics and the three-dimensional shear internal stress limit characteristics of the relevant components.

[0062] Compared with the prior art, the present invention has the following beneficial effects:

[0063] The present invention relates to a method and system for load simulation and optimization of underground parking garage support systems. Based on geological structure, constraints are set for the underground parking garage, and a suitable set of components is selected from a BIM library. A BIM model of the support system is established based on the component set, and key nodes are identified. Load data is generated based on the dynamic mechanical data of the underground parking garage. Load transfer characteristics of key nodes are determined based on the load data. Deformation parameters of associated components are determined based on the load transfer characteristics. Potential risks of the support system are estimated based on the deformation parameters, and the component configuration of the BIM model is adjusted accordingly. By setting constraints related to geological structure, a BIM model of the support system is established, and local load differences in the support system are simulated to identify components with potential risks. The component configuration is then adjusted and optimized to improve the load-bearing balance and structural safety of the support system. Attached Figure Description

[0064] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Wherein:

[0065] Figure 1 This is a flowchart of the load simulation and optimization method for the underground parking garage support system provided by the present invention.

[0066] Figure 2 This is a schematic diagram of the geological structure of the foundation pit where the underground parking garage is located.

[0067] Figure 3 It is the spatial stress distribution of the foundation pit where the underground parking garage is located.

[0068] Figure 4 It is a BIM model of the support system for the underground parking garage.

[0069] Figure 5 It is the distribution of load components of the associated components.

[0070] Figure 6 It is the three-dimensional spatial deformation of the associated components.

[0071] Figure 7 This is a structural diagram of the load simulation and optimization system for underground parking garage support system provided by the present invention. Detailed Implementation

[0072] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only for explaining the present invention and not for limiting the present invention. Furthermore, it should be noted that, for ease of description, only the parts related to the present invention are shown in the accompanying drawings, not all structures. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of the present invention.

[0073] The terms "comprising" and "having," and any variations thereof, used in this invention are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or apparatus that includes a series of steps or units is not limited to the steps or units listed, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to such process, method, product, or apparatus.

[0074] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of the invention. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0075] Please see Figure 1 As shown, this invention provides a method for load simulation and optimization of underground parking garage support systems, which includes the following steps:

[0076] S100: Based on the geological structure, set the constraints for the underground parking garage; based on the constraints, select a set of components suitable for the support system from the BIM library.

[0077] Furthermore, in S100, constraints for the underground parking garage are set based on the geological structure; based on these constraints, a set of components suitable for the support system is selected from the BIM library, specifically:

[0078] Obtain the geological structural parameters of the foundation pit where the underground parking garage is located; determine the potential spatial variations of the foundation pit based on the geological structural parameters;

[0079] Based on potential spatial changes, structural dynamic constraints for the underground parking garage are set; among them, the structural dynamic constraints include the stress distribution generated by the spatial deformation of the foundation pit on the underground parking garage.

[0080] Based on the stress distribution, estimate the upper limit of stress in the foundation pit; based on the upper limit of stress, the stress resistance labels of components in the BIM library, and the component composition requirements of the underground parking garage support system, select a set of components suitable for the support system from the BIM library.

[0081] The construction of underground parking garages mainly includes steps such as foundation pit excavation, support system pouring, backfilling, and the construction of surface buildings (such as roads). The foundation pit excavation requires digging a pit with a volume matching the design requirements of the underground parking garage. The construction site of an underground parking garage contains various types of geological layers from shallow to deep, each with specific soil materials and thickness, resulting in a unique geological structure. Please refer to [link / reference]. Figure 2The construction site of the underground parking garage consists of various geological layers, starting from the surface, including fill, clay, silt, fine sand, gravel, clay, and medium sand. Each layer has different soil properties and thickness, as well as varying water content, resulting in differences in strength and compressibility. Furthermore, the different densities and thicknesses of these layers affect their compressive forces on adjacent layers. After excavation, the bottom of the pit will settle, and the layers on the surrounding walls will compress against each other, altering the shape and size of the pit's interior. These changes will inevitably exert external forces on the subsequently constructed underground parking garage. Considering that the shape and size of the pit's interior depends on the soil structure, it is necessary to first obtain the soil structure of the area. In practice, soil exploration is conducted to obtain relevant geological parameters, including but not limited to soil type, density, and thickness for each layer. Then, based on the above geological structural parameters, finite element modeling analysis is performed to obtain the geological structural finite element model of the geographical space where the foundation pit is located (e.g., Figure 2 (As shown). The above-mentioned geological structure finite element model is used to predict the potential spatial changes in the soil structure of the foundation pit due to settlement and compression, so as to accurately predict the changes in the spatial shape and / or volume of the foundation pit.

[0082] As described above, when the spatial shape and / or volume of the foundation pit changes, the subsequently constructed underground parking garage will be subjected to soil forces from different locations. It is understandable that the different soil structures on the surrounding walls of the foundation pit result in varying stress levels exerted on the completed underground parking garage at different locations on the surrounding walls. In other words, the stress on the underground parking garage caused by the spatial deformation of the foundation pit exhibits spatial variability. Please refer to [link / reference]. Figure 3 The stress exerted on the underground parking garage by the spatial deformation of the excavation pit varies significantly around the pit. One wall experiences greater stress due to soil settlement and / or deformation compression, while the other wall experiences less stress due to less soil settlement and / or deformation compression. This indicates an unbalanced stress distribution on the underground parking garage, with some areas experiencing greater stress and others less. This stress imbalance creates structural dynamic constraints on the underground parking garage. The types and sizes of components in different areas of the underground parking garage must be adapted to this stress imbalance to ensure the overall structural integrity of the garage. Therefore, determining the stress distribution of the underground parking garage based on the potential spatial changes of the excavation pit serves as a structural dynamic constraint and can be used as a reference for the selection of components in each area of ​​the underground parking garage.

[0083] Spatial cluster analysis was performed on the stress distribution under structural dynamic constraints to estimate the upper limit of stress at each location of the foundation pit. This upper limit reflects the maximum stress exerted on the underground parking garage by settlement and / or deformation of the foundation pit. When selecting components for the underground parking garage, this upper limit was used as a reference. Combined with component stress resistance tags from the BIM library (Building Information Modeling library) and the component composition requirements of the underground parking garage support system, several suitable components with appropriate stress resistance were selected from the BIM library. All selected components were numbered and labeled to form a component set. The BIM library includes various types of components such as columns, beams, and roof slabs, each with a specific shape, size, and stress resistance value. The BIM library also adds tags about the shape, size, and stress resistance value of each component. Furthermore, the underground parking garage support system consists of a certain number and type of columns, beams, and roof slabs. To ensure the complete construction of the underground parking garage support system, component selection from the BIM library is based on the component composition requirements of the underground parking garage support system (such as the required component types and quantities). By setting structural dynamic constraints for underground parking garages, the stress exerted on them by the foundation pit is comprehensively and quantitatively characterized. Furthermore, by combining the upper limit of stress, the stress resistance labels of components, and the component composition requirements of the support system, the selection of components such as columns, beams, and roof slabs is carried out to form a component configuration scheme for the construction of underground parking garages.

[0084] S200: Based on the component set, establish a BIM model of the support system and determine the key nodes; generate load data based on the dynamic mechanical data of the underground parking garage.

[0085] Furthermore, in S200, a BIM model of the support system is established based on the component set, from which key nodes are identified; load data is generated based on the dynamic mechanical data of the underground parking garage, specifically:

[0086] Based on the component attribute tags of the component set, generate auxiliary reinforcement tags; wherein, the component attribute tags include component type and component size; the auxiliary reinforcement tags include the deployment location and size of the stiffeners of the component;

[0087] Based on the component set and the attached reinforcement labels, a BIM model of the support system is established; the load-bearing capacity of the connection nodes corresponding to different components in the BIM model is obtained, and some connection nodes are marked as key nodes.

[0088] Historical traffic flow data corresponding to the underground parking garage is collected, and dynamic vibration data caused by traffic flow is extracted from it. Based on the dynamic vibration data, the expected load data of the underground parking garage is generated. The load data includes the vibration load applied to the underground parking garage during the movement of traffic.

[0089] As previously mentioned, the component set selected from the BIM library mainly includes columns, beams, and roof slabs. These components are in their original foundation state in the BIM library (i.e., they only have the basic shape and dimensions) and do not have any additional reinforcement structures. Different areas of the underground parking garage experience different stresses due to the spatial deformation of the excavation pit, and the stresses experienced by components in different areas also vary. Understandably, components subjected to greater stress require additional reinforcement structures such as stiffeners to adapt to the stress environment of the underground parking garage where the component is located. In practice, the component attribute tags are extracted from the component set. These attribute tags may include, but are not limited to, each component type (e.g., the type of component and its location in the underground parking garage) and each component size (e.g., the three-dimensional dimensions of the component). From these attribute tags, the stress experienced by each component can be determined. If the stress exceeds a preset threshold, it is determined that the component needs to be reinforced, and the deployment location and size of the stiffeners are further determined. If the stress does not exceed the preset threshold, it is determined that the component does not need to be reinforced. By assigning appropriate reinforcement tags to each component within the component set using the above method, it is helpful to improve the structural and installation deployment information of the components. Based on all components included in the component set, their component attribute tags, and reinforcement tags, a BIM model of the support system is created for all components with and without reinforcements, according to their construction and installation location in the underground parking garage. Please refer to [link / reference]. Figure 4 The aforementioned local support unit is mainly composed of columns, beams, and top plates, and at least some of the columns, beams, and top plates may be equipped with reinforcing ribs.

[0090] The assembly and connection of components such as columns, beams, and roof slabs within the underground parking garage support system forms connection nodes, each connecting at least two different components. It is understood that each connection node is directly subjected to the forces exerted by all the components it connects to, resulting in each connection point experiencing a corresponding load-bearing capacity. This load-bearing capacity directly determines the compressive state of the connection node; a higher load-bearing capacity indicates greater structural stress borne by the connection node within the support system. By comparing this load-bearing capacity with a preset load-bearing capacity threshold, if the load-bearing capacity exceeds the threshold, the corresponding connection node is marked as a critical node. Critical nodes experience greater load-bearing capacity, and components directly connected to them are more prone to deformation. Marking critical nodes helps in quickly identifying the load-bearing capacity of components more susceptible to deformation.

[0091] Please see Figure 2After constructing an underground parking garage within the excavation pit and backfilling the pit, roads and other infrastructure will be built on the corresponding ground level. The flow of traffic on these roads will generate dynamic vibrations. The greater the traffic volume and / or the faster the traffic speed, the stronger and more frequent the dynamic vibrations. These dynamic vibrations will create loads acting on the underground parking garage. The continuous action of these loads on the underground parking garage will cause significant deformation of some components. By collecting and analyzing historical traffic flow data, dynamic vibration data caused by traffic flow can be obtained, providing a data foundation for subsequent simulation and analysis of the loads acting on the BIM model.

[0092] S300: Based on the load data, determine the load transfer characteristics of key nodes; based on the load transfer characteristics, determine the deformation parameters of related components.

[0093] Furthermore, in S300, based on the load data, the load transfer characteristics of key nodes are determined; based on the load transfer characteristics, the deformation parameters of associated components are determined, specifically:

[0094] By mapping the load data to the BIM model, the load distribution on the corresponding structural surfaces of the BIM model can be obtained.

[0095] Based on the load distribution, finite element analysis is performed on the BIM model to determine the load transfer characteristics of key nodes; among which, the load transfer characteristics include the load components transferred to each associated component connected to the key node.

[0096] Based on the spatial vector of the load components and the structural characteristics of the associated components, the deformation parameters of the associated components are determined; among them, the deformation parameters include the deformation direction and deformation amplitude in three-dimensional space.

[0097] As described above, the dynamic vibrations generated by traffic flow on the surface roads are transmitted to the underground parking garage support system, creating loads on the corresponding components within the system. It is understandable that key nodes within the support system bear significant structural stress. When these loads are applied to the support system, the key nodes receive a large portion of the load and transfer it to the components directly connected to them (i.e., associated components). These associated components can be, but are not limited to, columns, beams, and roof slabs directly connected to the key nodes. The magnitude and direction of the load components transferred to the associated components are related to the shape, size, and orientation of the associated components. In practice, a mechanical simulation analysis is performed on the BIM model, mapping the load data to the BIM model to obtain the load distribution on each of the multiple structural surfaces of the BIM model. These structural surfaces can be, but are not limited to, the surface containing the top, the surfaces containing multiple columns, or the surfaces containing multiple beams. Then, based on the above load distribution and the shape, size, and orientation of all associated components, a finite element analysis is performed on the BIM model to determine the load components transferred to each associated component directly connected to the key nodes. Please see Figure 5 This represents the load component distribution along the length of one of the associated structural members (beams). From Figure 5 It can be seen that the load on the aforementioned connected components is higher at the middle part along their length, and the load gradually decreases from the middle part towards both ends. By performing a three-dimensional spatial quantitative simulation analysis of the load components transmitted to the connected components, the load distribution of the connected components can be comprehensively and accurately measured.

[0098] It is understandable that the load components transferred to the associated components will cause deformation in three-dimensional space, and the direction and magnitude of this deformation are directly related to the direction and magnitude of the load components. In practice, based on the spatial vector of the load components (e.g., vector direction and magnitude) and the structural characteristics of the associated components (e.g., the shape, size, and elastic modulus of the associated components), load-deformation simulation analysis is performed on the associated components to obtain the deformation direction and magnitude of the associated components in three-dimensional space. Please refer to [link / reference]. Figure 6 , corresponding to Figure 5 The deformation displacement distribution along the vertical direction (i.e., the vertical direction) under the load component distribution of the associated components. From Figure 6 It is evident that the load on the connected component is higher in the middle section along its length, and the deformation displacement in the vertical direction is also higher in the middle section, gradually decreasing from the middle section towards both ends. Determining the deformation parameters of the connected component provides a basis for subsequently estimating the potential risks of the overall support system structure.

[0099] S400: Estimate the potential risks of the support system based on deformation parameters; adjust the component configuration of the BIM model based on the layout of potential risks.

[0100] Furthermore, in S400, the potential risks of the support system are estimated based on deformation parameters; and the component configuration of the BIM model is adjusted according to the layout of the potential risks, specifically:

[0101] Based on the deformation parameters, determine the three-dimensional shear stress of the associated components; predict the changes in the three-dimensional shear stress and estimate the potential risks of the support system.

[0102] Obtain the shear resistance characteristics of the components corresponding to potential risks, and adjust the component configuration parameters of the BIM model based on the shear resistance characteristics and the three-dimensional shear internal stress limit characteristics of the components; wherein, the component configuration parameters include the size and / or shape of the components.

[0103] As described above, the associated components of the support system undergo three-dimensional deformation and displacement under the action of load components. This three-dimensional deformation and displacement directly leads to the formation of three-dimensional shear stress in the associated components. This three-dimensional shear stress changes with the three-dimensional deformation and displacement. When the three-dimensional shear stress increases to a preset stress threshold, the associated component will transition from elastic deformation to plastic deformation. It is understandable that during elastic deformation, the associated component can recover its original structural shape after the load is reduced or removed; that is, the elastic deformation of the associated component is recoverable, and the amplitude of elastic deformation is limited within a certain range. When the three-dimensional shear stress exceeds the acceptable limit of elastic deformation in the associated component, the associated component transitions from elastic deformation to plastic deformation. Once plastic deformation occurs, the associated component will not be able to recover its original structural shape after the load is reduced or removed, and the amplitude of plastic deformation is unrestricted, leading to structural damage and thus creating structural risk. In practice, based on the deformation parameters of the associated components, the corresponding three-dimensional shear internal stress is determined. The changing trend of the aforementioned three-dimensional shear internal stress is predicted, and it is determined whether the aforementioned three-dimensional shear internal stress will reach the critical threshold for the associated components to transform from elastic deformation to plastic deformation. If it will, it is determined that the corresponding associated components have potential risks; otherwise, it is determined that the corresponding associated components do not have potential risks.

[0104] Furthermore, the shear resistance characteristics (such as the maximum shear strength value of the component) of the associated components with potential risks and their directly connected components are obtained. These shear resistance characteristics are then compared with the corresponding component's three-dimensional shear stress limit characteristics (i.e., the three-dimensional shear stress limit value) to determine the shear resistance margin of the corresponding component (i.e., whether the component's maximum shear strength value is sufficient to withstand the aforementioned three-dimensional shear stress limit value). If it can withstand it, no adjustment to the corresponding component's configuration parameters is needed; otherwise, the configuration parameters need to be adjusted. For example, when adjusting the configuration parameters of a corresponding component is required, other components of the same type (also columns, beams, or slabs) but with different dimensions and / or shapes can be selected based on the component attribute tags in the BIM library. This ensures that the shear resistance characteristics of the newly selected components can withstand the aforementioned three-dimensional shear stress limit value. By judging and adjusting the shear resistance performance of components corresponding to potential risks, precise matching and replacement of all components with potential structural problems within the underground parking garage support system can be achieved. This ensures that all components within the underground parking garage support system have good shear resistance to cope with external loads, ensuring the overall structural stability and safety of the support system.

[0105] As another alternative embodiment of the above S400, it may be:

[0106] S400: Based on deformation parameters, estimate the potential risks caused by changes in internal stress in the support system; based on the stress resistance properties of the relevant components with potential risks, adjust the structural configuration parameters of the relevant components.

[0107] Furthermore, in S400, based on deformation parameters, the potential risks caused by changes in internal stress within the support system are estimated; based on the stress resistance properties of the relevant components with potential risks, the structural configuration parameters of the relevant components are adjusted, specifically as follows:

[0108] Based on the deformation parameters, the three-dimensional shear stress of the associated components is determined; the change of the three-dimensional shear stress is predicted to determine whether the three-dimensional shear stress will reach the preset critical threshold, thereby estimating the potential risks caused by the change of the three-dimensional shear stress in the support system.

[0109] Obtain the shear resistance characteristics of relevant components with potential risks, and adjust the size and / or shape of relevant components based on the shear resistance characteristics and the three-dimensional shear internal stress limit characteristics of relevant components.

[0110] As described above, the associated components of the support system undergo three-dimensional deformation and displacement under the action of load components. This three-dimensional deformation and displacement directly leads to the formation of three-dimensional shear stress in the associated components. This three-dimensional shear stress changes with the three-dimensional deformation and displacement. When the three-dimensional shear stress increases to a preset stress threshold, the associated component will transition from elastic deformation to plastic deformation. It is understandable that during elastic deformation, the associated component can recover its original structural shape after the load is reduced or removed; that is, the elastic deformation of the associated component is recoverable, and the amplitude of elastic deformation is limited within a certain range. When the three-dimensional shear stress exceeds the acceptable limit of elastic deformation in the associated component, the associated component transitions from elastic deformation to plastic deformation. Once plastic deformation occurs, the associated component will not be able to recover its original structural shape after the load is reduced or removed, and the amplitude of plastic deformation is unrestricted, leading to structural damage and thus creating structural risk. In practice, based on the deformation parameters of the associated components, the corresponding three-dimensional shear internal stress is determined. The changing trend of the three-dimensional shear internal stress is predicted, and it is determined whether the three-dimensional shear internal stress will reach the preset critical threshold for the associated components to transform from elastic deformation to plastic deformation during the changing process. If so, it is determined that the associated components have potential risks (i.e., the associated components have structural risks caused by plastic deformation); otherwise, it is determined that the associated components do not have potential risks (i.e., the associated components do not have structural risks caused by plastic deformation).

[0111] Furthermore, the shear resistance characteristics (such as the maximum shear strength value of the relevant components) of potentially risky associated components and their directly connected components (i.e., all of the aforementioned associated components and their directly connected components belong to the aforementioned potentially risky related components) are obtained. These shear resistance characteristics are then compared with the three-dimensional shear stress limit characteristics (i.e., the three-dimensional shear stress limit value) of the relevant components to determine the shear resistance margin of the relevant components (i.e., whether the maximum shear strength value of the component itself is sufficient to withstand the aforementioned three-dimensional shear stress limit value). If it can withstand it, then there is no need to adjust the structural configuration parameters of the relevant components; if it cannot withstand it, then the structural configuration parameters of the relevant components need to be adjusted. For example, when it is necessary to adjust the structural configuration parameters of the relevant components, other components of the same type as the aforementioned related components (e.g., also columns, beams, or slabs) but with different dimensions and / or shapes can be selected based on the component attribute tags in the BIM library. This ensures that the shear resistance characteristics of the reselected components can withstand the aforementioned three-dimensional shear stress limit value. By assessing and replacing the shear resistance of relevant components with potential risks, the system can accurately match and replace all components with potential structural problems within the underground parking garage support system. This ensures that all components within the underground parking garage support system have good shear resistance to cope with external loads, thereby ensuring the overall structural stability and safety of the support system.

[0112] Please see Figure 7 As shown, this invention provides a load simulation and optimization system for underground parking garage support systems, which includes the following modules:

[0113] The component selection module is used to set constraints for the underground parking garage based on the geological structure; and to select a set of components suitable for the support system from the BIM library based on the constraints.

[0114] The BIM model creation module is used to create a support system BIM model based on the component set and to identify key nodes from it.

[0115] The load data generation module is used to generate load data based on the dynamic mechanical data of the underground parking garage.

[0116] The load transfer determination module is used to determine the load transfer characteristics of key nodes based on load data.

[0117] The deformation determination module is used to determine the deformation parameters of associated components based on load transfer characteristics.

[0118] The risk estimation module is used to estimate the potential risks of the support system based on deformation parameters;

[0119] The component configuration adjustment module is used to adjust the component configuration of the BIM model based on the layout of potential risks.

[0120] Furthermore, the component selection module is used to set constraints for the underground parking garage based on geological structure; based on these constraints, it selects a set of components suitable for the support system from the BIM library, specifically:

[0121] Obtain the geological structural parameters of the foundation pit where the underground parking garage is located; determine the potential spatial variations of the foundation pit based on the geological structural parameters;

[0122] Based on potential spatial changes, structural dynamic constraints for the underground parking garage are set; among them, the structural dynamic constraints include the stress distribution generated by the spatial deformation of the foundation pit on the underground parking garage.

[0123] Based on the stress distribution, estimate the upper limit of stress in the foundation pit; based on the upper limit of stress, the stress resistance labels of components in the BIM library, and the component composition requirements of the underground parking garage support system, select a set of components suitable for the support system from the BIM library.

[0124] Furthermore, the BIM model building module is used to create a support system BIM model based on the component set, and to identify key nodes from it, specifically:

[0125] Based on the component attribute tags of the component set, generate auxiliary reinforcement tags; wherein, the component attribute tags include component type and component size; the auxiliary reinforcement tags include the deployment location and size of the stiffeners of the component;

[0126] Based on the component set and the attached reinforcement labels, a BIM model of the support system is established; the load-bearing capacity of the connection nodes corresponding to different components in the BIM model is obtained, and some connection nodes are marked as key nodes.

[0127] The load data generation module is used to generate load data based on the dynamic mechanical data of the underground parking garage, specifically:

[0128] Historical traffic flow data corresponding to the underground parking garage is collected, and dynamic vibration data caused by traffic flow is extracted from it. Based on the dynamic vibration data, the expected load data of the underground parking garage is generated. The load data includes the vibration load applied to the underground parking garage during the movement of traffic.

[0129] Furthermore, the load transfer determination module is used to determine the load transfer characteristics of key nodes based on the load data, specifically:

[0130] By mapping the load data to the BIM model, the load distribution on the corresponding structural surfaces of the BIM model can be obtained.

[0131] Based on the load distribution, finite element analysis is performed on the BIM model to determine the load transfer characteristics of key nodes; among which, the load transfer characteristics include the load components transferred to each associated component connected to the key node.

[0132] The deformation determination module is used to determine the deformation parameters of associated components based on load transfer characteristics, specifically:

[0133] Based on the spatial vector of the load components and the structural characteristics of the associated components, the deformation parameters of the associated components are determined; among them, the deformation parameters include the deformation direction and deformation amplitude in three-dimensional space.

[0134] Furthermore, the risk estimation module is used to estimate the potential risks of the support system based on deformation parameters, specifically:

[0135] Based on the deformation parameters, determine the three-dimensional shear stress of the associated components; predict the changes in the three-dimensional shear stress and estimate the potential risks of the support system.

[0136] The component configuration adjustment module is used to adjust the component configuration of the BIM model based on the layout of potential risks, specifically:

[0137] Obtain the shear resistance characteristics of the components corresponding to potential risks, and adjust the component configuration parameters of the BIM model based on the shear resistance characteristics and the three-dimensional shear internal stress limit characteristics of the components; wherein, the component configuration parameters include the size and / or shape of the components.

[0138] As another alternative embodiment of the aforementioned risk estimation module and component configuration adjustment module, it may be:

[0139] The risk estimation module is used to estimate the potential risks caused by changes in internal stress in the support system based on deformation parameters.

[0140] The component configuration adjustment module is used to adjust the structural configuration parameters of relevant components based on their stress resistance properties.

[0141] Furthermore, the risk estimation module is used to estimate the potential risks caused by changes in internal stress in the support system based on the deformation parameters, specifically:

[0142] Based on the deformation parameters, the three-dimensional shear stress of the associated components is determined; the change of the three-dimensional shear stress is predicted to determine whether the three-dimensional shear stress will reach the preset critical threshold, thereby estimating the potential risks caused by the change of the three-dimensional shear stress in the support system.

[0143] The component configuration adjustment module is used to adjust the structural configuration parameters of relevant components based on their stress resistance properties, specifically:

[0144] Obtain the shear resistance characteristics of relevant components with potential risks, and adjust the size and / or shape of relevant components based on the shear resistance characteristics and the three-dimensional shear internal stress limit characteristics of relevant components.

[0145] The underground parking garage support system load simulation and optimization system of the present invention has the same operation and effect as the above-mentioned underground parking garage support system load simulation and optimization method, and will not be described again here.

[0146] Through the above description of the embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of a necessary general-purpose hardware platform, or by a combination of hardware and software. Based on this understanding, the above technical solutions, in essence or the part that contributes to the prior art, can be embodied in the form of a computer product. The present invention can take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0147] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Other embodiments may also be used. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for load simulation and optimization of underground parking garage support system, characterized in that, The method includes the following steps: S100: Based on the geological structure, set the constraints for the underground parking garage; based on the constraints, select a set of components suitable for the support system from the BIM library; S200: Based on the aforementioned component set, establish a BIM model of the support system and determine key nodes from it; generate load data based on the dynamic mechanical data of the underground parking garage; S300: Based on the load data, determine the load transfer characteristics of the key node; based on the load transfer characteristics, determine the deformation parameters of the associated components; S400: Based on the deformation parameters, estimate the potential risks of the support system; based on the layout of the potential risks, adjust the component configuration of the BIM model, specifically as follows: Based on the deformation parameters, the three-dimensional shear stress of the associated component is determined; the change of the three-dimensional shear stress is predicted, and the potential risk of the support system is estimated. Obtain the shear resistance characteristics of the component corresponding to the potential risk, and adjust the component configuration parameters of the BIM model according to the shear resistance characteristics and the three-dimensional shear internal stress limit characteristics of the component; wherein, the component configuration parameters include the size and / or shape of the component.

2. The method according to claim 1, characterized in that, In S100, constraints for the underground parking garage are set based on the geological structure; based on these constraints, a set of components suitable for the support system is selected from the BIM library, specifically: Obtain the geological structural parameters of the foundation pit where the underground parking garage is located; determine the potential spatial variations of the foundation pit based on the geological structural parameters; Based on the potential spatial changes, structural dynamic constraints for the underground parking garage are set; wherein, the structural dynamic constraints include the stress distribution generated by the spatial deformation of the foundation pit on the underground parking garage; Based on the stress distribution, estimate the upper limit of stress in the foundation pit; based on the upper limit of stress, the stress resistance labels of components in the BIM library, and the component composition requirements of the underground parking garage support system, select a set of components suitable for the support system from the BIM library.

3. The method according to claim 1, characterized in that, In S200, a BIM model of the support system is established based on the aforementioned component set, and key nodes are identified from it; load data is generated based on the dynamic mechanical data of the underground parking garage, specifically: Based on the component attribute tags of the component set, an auxiliary reinforcement tag is generated; wherein, the component attribute tags include component type and component size; the auxiliary reinforcement tag includes the deployment location and size of the stiffeners of the component; Based on the component set and the attached reinforcement labels, a BIM model of the support system is established; the load-bearing capacity of the connection nodes corresponding to different components in the BIM model is obtained, and a portion of the connection nodes are identified as key nodes. Historical traffic flow data corresponding to the underground parking garage is collected, and dynamic vibration data caused by the traffic flow is extracted from it; based on the dynamic vibration data, the expected load data of the underground parking garage is generated; wherein, the load data includes the vibration load applied to the underground parking garage during the movement of traffic.

4. The method according to claim 1, characterized in that, In S300, based on the load data, the load transfer characteristics of the key node are determined; based on the load transfer characteristics, the deformation parameters of the associated components are determined, specifically: The load data is mapped to the BIM model to obtain the load distribution on the corresponding structural surfaces of the BIM model; Based on the load distribution, a finite element analysis is performed on the BIM model to determine the load transfer characteristics of the key nodes; wherein, the load transfer characteristics include the load components transferred to each associated component connected to the key node. Based on the spatial vector of the load component and the structural characteristics of the associated component, the deformation parameters of the associated component are determined; wherein, the deformation parameters include the deformation direction and deformation amplitude in three-dimensional space.

5. A load simulation and optimization system for underground parking garage support systems, characterized in that, The system includes the following modules: The component selection module is used to set constraints for the underground parking garage based on the geological structure; and to select a set of components suitable for the support system from the BIM library based on the constraints. The BIM model building module is used to build a support system BIM model based on the component set and to determine key nodes therefrom. The load data generation module is used to generate load data based on the dynamic mechanical data of the underground parking garage. The load transfer determination module is used to determine the load transfer characteristics of the key node based on the load data. The deformation determination module is used to determine the deformation parameters of the associated components based on the load transfer characteristics. The risk estimation module is used to estimate the potential risks of the support system based on the deformation parameters, specifically: Based on the deformation parameters, the three-dimensional shear stress of the associated component is determined; the change of the three-dimensional shear stress is predicted, and the potential risk of the support system is estimated. The component configuration adjustment module is used to adjust the component configuration of the BIM model according to the layout of the potential risks, specifically as follows: Obtain the shear resistance characteristics of the component corresponding to the potential risk, and adjust the component configuration parameters of the BIM model according to the shear resistance characteristics and the three-dimensional shear internal stress limit characteristics of the component; wherein, the component configuration parameters include the size and / or shape of the component.

6. The system according to claim 5, characterized in that, The component selection module is used to set constraints for the underground parking garage based on geological structure; and to select a set of components suitable for the support system from the BIM library based on the constraints, specifically: Obtain the geological structural parameters of the foundation pit where the underground parking garage is located; determine the potential spatial variations of the foundation pit based on the geological structural parameters; Based on the potential spatial changes, structural dynamic constraints for the underground parking garage are set; wherein, the structural dynamic constraints include the stress distribution generated by the spatial deformation of the foundation pit on the underground parking garage; Based on the stress distribution, estimate the upper limit of stress in the foundation pit; based on the upper limit of stress, the stress resistance labels of components in the BIM library, and the component composition requirements of the underground parking garage support system, select a set of components suitable for the support system from the BIM library.

7. The system according to claim 5, characterized in that, The BIM model building module is used to build a support system BIM model based on the component set, and to determine key nodes from it, specifically: Based on the component attribute tags of the component set, an auxiliary reinforcement tag is generated; wherein, the component attribute tags include component type and component size; the auxiliary reinforcement tag includes the deployment location and size of the stiffeners of the component; Based on the component set and the attached reinforcement labels, a BIM model of the support system is established; the load-bearing capacity of the connection nodes corresponding to different components in the BIM model is obtained, and a portion of the connection nodes are identified as key nodes. The load data generation module is used to generate load data based on the dynamic mechanical data of the underground parking garage, specifically: Historical traffic flow data corresponding to the underground parking garage is collected, and dynamic vibration data caused by the traffic flow is extracted from it; based on the dynamic vibration data, the expected load data of the underground parking garage is generated; wherein, the load data includes the vibration load applied to the underground parking garage during the movement of traffic.

8. The system according to claim 5, characterized in that, The load transfer determination module is used to determine the load transfer characteristics of the key nodes based on the load data, specifically: The load data is mapped to the BIM model to obtain the load distribution on the corresponding structural surfaces of the BIM model; Based on the load distribution, a finite element analysis is performed on the BIM model to determine the load transfer characteristics of the key nodes; wherein, the load transfer characteristics include the load components transferred to each associated component connected to the key node. The deformation determination module is used to determine the deformation parameters of the associated components based on the load transfer characteristics, specifically: Based on the spatial vector of the load component and the structural characteristics of the associated component, the deformation parameters of the associated component are determined; wherein, the deformation parameters include the deformation direction and deformation amplitude in three-dimensional space.

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