CN115292788A - A Realization Method of Rapid Construction of Large-scale Building Spatial Structure Model Based on Sub-block - Google Patents

Abstract

A method for quickly constructing a large building space structure model based on subblocks comprises the steps of generating a model by constructing a basic frame, generating an integral structure model by adopting an insert subblock algorithm, and quickly constructing the optimal structure of the large building space structure model by adopting a space structure optimization design algorithm. The invention obtains the structural model with the most reasonable design, the highest material utilization rate and the best economic benefit.

Description

Realization method of rapid construction of large-scale building space structure model based on sub-blocks

technical field

The invention relates to a technology in the field of architectural design, in particular to a method for quickly building and implementing a sub-block-based large-scale architectural space structure model.

Background technique

Modeling is the first and essential step in structural design. With the application of space structure more and more widely, the shape of architectural structure tends to become more and more complicated. At present, for complex spatial architectural structures, the modeling process is extremely cumbersome, time-consuming, inefficient, and the design process is not flexible enough. Once the modification usually increases the workload by several times or even dozens of times, even if the latest computer-aided technology is used , and cannot solve the core pain points, that is, fast and flexible modeling and design of complex spatial structures, and timely and convenient model adjustment. For complex spatial structures, limited by the design period and modeling efficiency, it is impossible to achieve multi-scheme optimization comparisons and select a more reasonable and optimized model, resulting in problems such as high material consumption and poor economic efficiency for complex spatial structures.

Contents of the invention

The present invention aims at the outstanding problems such as the cumbersome, time-consuming and low-efficiency modeling process of complex spatial structures in the prior art, which makes it difficult to realize the optimization comparison of different schemes, resulting in high material consumption and poor economy, and proposes a large-scale building based on sub-blocks The rapid construction and implementation method of the spatial structure model can obtain the structural model with the most reasonable design, the highest material utilization rate, and the best economic benefits.

The present invention is achieved through the following technical solutions:

The invention relates to a method for quickly building a large-scale building space structure model based on sub-blocks. After the model is generated by building a basic frame, an overall structure model is generated by inserting a sub-block algorithm, and then a large-scale building space structure is quickly constructed through a space structure optimization design algorithm. The optimal structure of the model.

The algorithm for inserting sub-blocks refers to inserting sub-blocks according to the wires and the number of copies in the model generated by the basic framework to complete the model construction.

The space structure optimization design algorithm refers to: adjust the component section and node model according to the finite element calculation results, optimize the model, so as to obtain the model structure with the minimum steel consumption.

The present invention relates to a system for realizing the above method, comprising: a model basic frame generating unit, a sub-block inserting unit, and a structure optimization design unit, wherein: the model basic frame generating unit generates model information of each basic sub-block and wire according to modeling information , positioning information, structure boundary information and load calculation methods for each working condition, the sub-block insertion unit inserts the sub-blocks along the wires according to the number of parts according to the defined sub-blocks and wire information, and obtains the structural model of the applied load and constraints, and optimizes the structure The design unit performs component and node optimization design on the structural model, compares and analyzes the optimization results of all structural models, and obtains the optimal structure of the large-scale building space structural model.

The model basic frame generation unit includes: define sub-block module, attached sub-block module, fill sub-block module, define wire module, define load template module, wherein: define sub-block module design basic sub-block model according to modeling information; The define wire module draws and defines the wire according to the structure boundary information, and obtains the structure boundary and part number information; the define load template module designs the load template according to the design information, and obtains the load calculation method of each working condition.

The basic sub-block model includes: sub-blocks, subsidiary sub-blocks, filling sub-blocks and positioning information.

technical effect

The present invention can shorten more than 90% of the modeling time of complex spatial structures by means of model basic frame generation algorithm, sub-block insertion algorithm and optimization design algorithm on the basis of the definition of basic sub-blocks and wires, and fully meets the requirements of design standards. Through the method, a large number of models with different control parameters can be automatically established for comparison and optimization, so as to obtain the most reasonable structural model, which can save more than 10% of materials and improve economic benefits by more than 50%.

Description of drawings

Fig. 1 is a flowchart of the present invention;

Fig. 2 is structural representation;

Figure 3 is a structural rendering;

Fig. 4 is a sub-block definition information diagram;

Fig. 5 is a geometric information map of the subsidiary sub-block;

Fig. 6 is a diagram of positioning information of subsidiary sub-blocks;

Fig. 7 is an information diagram of filling sub-block definition;

Fig. 8 is the definition information figure of two wires that number of copies is 24;

Fig. 9 is the definition information map of two wires whose number of copies is 36;

Fig. 10 is a three-dimensional diagram of the model structure of 24 copies;

Fig. 11 is the top view of optimal structure (number of copies 36);

Fig. 12 is a three-dimensional diagram of optimal structure (the number of copies is 36);

Figure 13 is a comparison diagram of sub-block structures in different regions.

Detailed ways

As shown in Figure 1, this embodiment relates to a method for quickly constructing and implementing a complex spatial structure model based on sub-blocks, including:

Step 1. Build the basic frame generation model, including:

Step 1.1) Define sub-blocks, including:

Step 1.1.1) Define all sub-block geometric elements, including sub-block nodes, elements, loads and boundary information;

Step 1.1.2) Define the sub-block constraint information, including the fixed-length bar, the fixed-direction bar, the node on the wire, and the information of the equal division point of the wire. Among them: the fixed-length rod refers to the rod whose length is guaranteed to be constant during the sub-block insertion process, the fixed-direction rod refers to the rod whose direction is guaranteed to remain unchanged during the sub-block insertion process, and the node on the wire refers to the rod in the sub-block The node that remains on the wire during the insertion process, the wire bisection point refers to the node that remains on the wire bisect point during the insertion of the sub-block;

Step 1.1.3) Define sub-block positioning information, including two base points and sub-block directions.

Step 1.2) Define wires, including:

Step 1.2.1) define a group of lines or curves connected end to end (can be only one point) as a wire;

Step 1.2.2) define the maximum number of copies Nmax and the minimum number of copies Nmin of the wire;

Step 1.2.3) Define the change step S of the number of wires.

Step 1.3) Define the load template

Step 1.3.1) Define load cases, including dead load, live load, wind load, temperature action and earthquake action, etc.;

Step 1.3.2) Define the load calculation method for each working condition.

Preferably, if necessary, the subsidiary sub-blocks attached to the sub-blocks can be further defined, including:

i) Define all subsidiary sub-block geometric elements, including node, unit, load and boundary information of subsidiary sub-blocks;

ii) Define the constraint information of the subsidiary sub-block, including the information of the fixed-length bar of the subsidiary sub-block and the directional bar of the subsidiary sub-block. Among them: the fixed-length rod of the subsidiary sub-block refers to the rod whose length is guaranteed to be constant during the insertion of the subsidiary sub-block, and the fixed-length rod of the subsidiary sub-block refers to the rod whose direction is guaranteed to be constant during the insertion of the subsidiary sub-block;

iii) Define the positioning information of the subsidiary sub-block, including the start base point, the end base point, the two base points and the corresponding nodes of the sub-block to which they belong, and the direction of the subsidiary sub-block.

Preferably, if necessary, the padding sub-block attached to the sub-block can be further defined, including:

a) Define all filling sub-block geometric elements, including filling sub-block nodes, elements, loads and boundary information;

b) Define filling sub-block constraint information, including filling sub-block fixed-length bar, filling sub-block directional bar, information of equal division points of subsidiary nodes. Among them: the fixed-length rod of the filling sub-block refers to the rod whose length is guaranteed to remain unchanged during the insertion of the filling sub-block, and the fixed-length rod of the filling sub-block refers to the rod that ensures the direction of the rod remains unchanged during the insertion of the filling sub-block. Affiliated nodes refer to nodes that remain on the owning sub-block and the auxiliary sub-block during the insertion of the filler sub-block;

c) Define the filling sub-block positioning information, including two start reference corner points, two end reference corner points, and the corresponding nodes of the reference corner points and the sub-blocks to which they belong.

Step 2. Insert the wires and step lengths in the model generated by the basic framework into sub-blocks to complete the model construction, specifically: according to the number of copies, the step size is S, the maximum number of copies Nmax and the minimum number of copies Nmin, and the number of wires n is calculated. ={Nmin, Nmin+S, Nmin+2S, ..., Nmax}, then calculate the pairwise corresponding sub-block insertion points according to each number n, each group of insertion points is inserted into the sub-block as the base point position of the sub-block, and the obtained X models, X=(Nmax-Nmin)/S.

Preferably, if necessary, additional sub-blocks or filling sub-blocks can be further inserted between adjacent sub-blocks, that is, two nodes corresponding to the two base points of the auxiliary sub-blocks are found on two adjacent sub-blocks, and the adjacent sub-blocks Insert the two corresponding nodes on the block as the base point into the subsidiary sub-block; or search for four nodes corresponding to the four reference corner points of the filled sub-block on two adjacent sub-blocks, and use the four corresponding nodes on the adjacent sub-block as Insert a filler sub-block at the corner point position of the filler sub-block.

Step 3: Apply loads and boundaries, optimize the components and nodes of the generated X model structures, and select the optimal structure according to the optimization index, including:

Step 3.1) Refer to the load information on the defined sub-blocks, subsidiary sub-blocks and filling sub-blocks, and apply loads to the generated structure according to the defined load template;

Step 3.2) Apply boundary conditions to the generated structure with reference to the boundary information on the defined sub-blocks, subsidiary sub-blocks and filler sub-blocks.

Step 3.3) Optimizing the design of components and nodes of the generated structure, including: adjusting the section of each model component and the model of nodes according to the finite element calculation results to achieve the minimum steel consumption.

Step 3.4) Compare the steel consumption of the X models, and set the model structure with the smallest steel consumption as the optimal structure.

After specific practical experiments, take the design of a stadium roof with a car-spoke cable truss structure as an example. The structure includes cable trusses, rigid outer ring beams, and internal upper and lower ring cables. Among them: the roof load is transmitted to the foundation through the outer ring beams and columns ; In each cable truss, the fly column is a rigid component, which can be both tensioned and compressed; the cable is a flexible component, which can only be tensioned; the roof structure is saddle-shaped, and the inner and lower ring cables and the outer ring beam are in the horizontal plane The projection of is an ellipse, in which the horizontal projection size of the outer ring beam is about 240×263m, and the horizontal projection size of the inner ring cable is about 124×148m, as shown in Figure 2 and Figure 3.

Through the above steps, 5 groups of models with the same basic sub-block and space wires with different numbers of wires are established, and the numbers of wires are 24, 28, 32, 36, and 40 respectively. Wherein: Fig. 4 is the sub-block definition information map of concrete actual test; Fig. 5 is the subsidiary sub-block geometry information map of specific practical test; Fig. 6 is the subsidiary sub-block positioning information map of specific practical test; Fig. 7 is the specific practical test Filling sub-block definition information diagram; Fig. 8 is the definition information diagram of two wires with 24 copies; Fig. 9 is the definition information diagram of two wires with 36 copies; Fig. 10 is a three-dimensional diagram of the model structure of 24 copies generated; Figure 11 is a top view of the optimal structure obtained from the test (36 copies); Figure 12 is a three-dimensional view of the optimal structure obtained from the test (36 copies).

Taking the optimal structure with 36 copies as an example, it only needs to establish a model of about 1/36 of the overall structure, including 638 components including sub-blocks, subsidiary sub-blocks and filling sub-blocks. By inserting sub-blocks, the model is automatically established. 36 different overall structural models with a total of 21,890 components. Since the 36 parts (36 copies) in the model are different, Figure 13 shows the optimal structure (the number of copies is 36) and inserts sub-blocks in different areas for comparison. Therefore, the initial establishment of sub-blocks, subsidiary sub-blocks and filling The simple copy of the sub-block is based on the method to copy the generated model after performing complex calculation adjustments on the initially established sub-block, subsidiary sub-block and filling sub-block. After the definition of sub-blocks, subsidiary sub-blocks, filling sub-blocks and wires is completed, the overall model can be generated within 1 minute. After adopting this method, the modeling time is about 1/36 of the original modeling time; when the model is changed from 36 parts to 24 parts or other parts, according to the original modeling method, the model needs to be re-established. With this method, only 36 parts of wires are changed to 24 parts, and 24 parts of the model can be completed within 1 minute (the total number of components is 14616). Modeling hardly takes any time, and this method can automatically complete the comparison and optimization of structural models with different numbers of copies to find the optimal structure.

Compared with the existing technology, this method adopts the sub-block insertion technology of this technology in the model generation link. After the basic sub-block and wire definition are completed, the modeling time of complex spatial structures can be shortened by more than 90%, and it fully meets the requirements of design standards. In the optimization design link, a large number of models with different control parameters can be automatically established through the optimization design algorithm of this method for comparison and optimization, so as to obtain the most reasonable structural model, which can save more than 10% of materials and increase economic benefits by more than 50%.

The above specific implementation can be partially adjusted in different ways by those skilled in the art without departing from the principle and purpose of the present invention. The scope of protection of the present invention is subject to the claims and is not limited by the above specific implementation. Each implementation within the scope is bound by the invention.

Claims (8)

1. A method for quickly building a large-scale building spatial structure model based on sub-blocks, characterized in that, after generating the model by initializing the basic frame, the overall structural model is generated by inserting a sub-block algorithm, and then the large-scale building is quickly constructed through the spatial structure optimization design algorithm. The optimal structure of the spatial structure model; The described algorithm of inserting sub-blocks refers to: inserting sub-blocks according to the wires and the number of copies in the model generated by the basic framework to complete the model construction; The space structure optimization design algorithm refers to: adjust the component section and node model according to the finite element calculation results, optimize the model, so as to obtain the model structure with the minimum steel consumption. 2. the large-scale building spatial structure model based on sub-block according to claim 1 is characterized in that, specifically comprises: Step 1. Build the basic frame generation model, including: Step 1.1) Define sub-blocks, including: Step 1.1.1) Define all sub-block geometric elements, including sub-block nodes, elements, loads and boundary information; Step 1.1.2) Define the sub-block constraint information, including the fixed-length rod, the fixed-direction rod, the node on the wire, the information of the wire equalization point; wherein: the fixed-length rod refers to the rod whose length is guaranteed to be constant during the insertion of the sub-block The fixed direction bar refers to the bar that ensures the direction of the bar during the insertion of the sub-block. The node on the wire refers to the node that remains on the wire during the insertion of the sub-block. Nodes that remain on the wire bisection point during insertion; Step 1.1.3) define sub-block positioning information, including two base points and sub-block directions; Step 1.2) Define wires, including: Step 1.2.1) define a group of lines, curves or a point connected end to end as a wire; Step 1.2.2) define the maximum number of copies Nmax and the minimum number of copies Nmin of the wire; Step 1.2.3) define the number of changes in the number of leads S; Step 1.3) Define the load template Step 1.3.1) Define the load case; Step 1.3.2) define the load calculation method of each working condition; Step 2. Insert the wires and step lengths in the model generated by the basic framework into sub-blocks to complete the model construction, specifically: according to the number of copies, the step size is S, the maximum number of copies Nmax and the minimum number of copies Nmin, and the number of wires n is calculated. ={Nmin, Nmin+S, Nmin+2S, ..., Nmax}, then calculate the pairwise corresponding sub-block insertion points according to each number n, each group of insertion points is inserted into the sub-block as the base point position of the sub-block, and the obtained X models, X=(Nmax-Nmin)/S; Step 3: Apply loads and boundaries, optimize the components and nodes of the generated X model structures, and select the optimal structure according to the optimization index, including: Step 3.1) Refer to the load information on the defined sub-blocks, subsidiary sub-blocks and filling sub-blocks, and apply loads to the generated structure according to the defined load template; Step 3.2) Apply boundary conditions to the generated structure with reference to the boundary information on the defined sub-blocks, subsidiary sub-blocks and filler sub-blocks; Step 3.3) Optimizing the design of components and nodes of the generated structure, including: adjusting the section of each model component and the model of nodes according to the finite element calculation results to achieve the minimum steel consumption; Step 3.4) Compare the steel consumption of the X models, and set the model structure with the smallest steel consumption as the optimal structure. 3. the fast building realization method based on the large-scale building spatial structure model of sub-block according to claim 2, is characterized in that, in step 1, further defines the sub-block attached to the sub-block, including: i) Define all subsidiary sub-block geometric elements, including node, unit, load and boundary information of subsidiary sub-blocks; ii) Define the constraint information of the subsidiary sub-block, including the information of the fixed-length rod of the subsidiary sub-block and the directional rod of the subsidiary sub-block, wherein: the fixed-length rod of the subsidiary sub-block refers to the rod whose length is guaranteed to be constant during the insertion of the subsidiary sub-block , the direction-fixing rod of the subsidiary sub-block refers to the rod that ensures the direction of the rod remains unchanged during the insertion of the subsidiary sub-block; iii) Define the positioning information of the subsidiary sub-block, including the start base point, the end base point, the two base points and the corresponding nodes of the sub-block to which they belong, and the direction of the subsidiary sub-block. 4. the fast building realization method based on the large-scale building space structure model of sub-block according to claim 2, it is characterized in that, in step 1, further define the filling sub-block attached to sub-block, comprising: a) Define all filling sub-block geometric elements, including filling sub-block nodes, elements, loads and boundary information; b) Define the constraint information of the filling sub-block, including the filling sub-block fixed length bar, the filling sub-block directional bar, and the information of the sub-node equal points, wherein: the filling sub-block fixed length bar refers to the guarantee during the filling sub-block insertion process The rod with constant length, the fixed direction rod of the filling sub-block refers to the rod whose direction is guaranteed to be constant during the insertion of the filling sub-block. Nodes on subblocks; c) Define the filling sub-block positioning information, including two start reference corner points, two end reference corner points, and the corresponding nodes of the reference corner points and the sub-blocks to which they belong. 5. the method for quickly building a large-scale building space structure model based on sub-blocks according to claim 2, characterized in that, in step 2, further insert sub-blocks or filling sub-blocks between adjacent sub-blocks, that is: between two adjacent sub-blocks Find two nodes corresponding to the two base points of the subsidiary sub-block on two adjacent sub-blocks, and insert the two corresponding nodes on the adjacent sub-blocks as the base point positions into the subsidiary sub-block; or find and fill in two adjacent sub-blocks The four nodes corresponding to the four reference corner points of the sub-block, and the four corresponding nodes on the adjacent sub-block are inserted into the padding sub-block as the corner points of the padding sub-block. 6. A system that realizes the rapid construction and realization method of the large-scale building space structure model based on sub-blocks described in any one of claims 1-5, it is characterized in that, comprising: model basic frame generation unit, sub-block insertion unit, structure Optimal design unit, in which: the model base frame generation unit generates the model information, positioning information, structure boundary information and load calculation method of each working condition of each basic sub-block and wire according to the modeling information, and the sub-block insertion unit completes the sub-block according to the definition and conductor information, insert the sub-blocks along the conductors according to the number of copies, and obtain the structural model of the applied load and constraint. The structural optimization design unit optimizes the components and nodes of the structural model, and compares and analyzes the optimization results of all structural models to obtain a large-scale building. Optimal structures for spatially structured models. 7. The system according to claim 6, characterized in that, said model basic frame generating unit comprises: defining sub-block modules, subsidiary sub-block modules, filling sub-block modules, defining wire modules, and defining load template modules, wherein: Define the sub-block module to design the basic sub-block model according to the modeling information; define the wire module to draw and define the wire according to the structure boundary information, and obtain the structure boundary and part number information; define the load template module to design the load template according to the design information, and get Calculation method of load in each working condition. 8. The system according to claim 7, wherein the basic sub-block model includes: sub-blocks, subsidiary sub-blocks, filling sub-blocks and positioning information.

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