Architectural design support device and architectural design support method

Abstract

To provide a building design support device and a building design support method for obtaining a structure analysis model for efficiently performing design for a short time.SOLUTION: A building design support device calculates sectional force applied to component elements included in a structure analysis model by structure analysis, respectively, and calculates a constraint condition parameter for each component element, on the basis of the sectional force. Then, the device, on the basis of whether or not the constraint condition parameter satisfies the constraint condition, selects an adjustment target component element, and adjusts a cross-sectional shape on the adjustment target component element. Such processing is repeatedly performed, until at least one of a first termination condition in which the constraint condition parameter satisfies the constraint condition on each component element, respectively, or a second termination condition in which the calculation results of the constraint condition parameters converge, is established.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present disclosure relates to a building design support device and a building design support method. [Background technology]

[0002] Generally, buildings are composed of many components. For example, steel structures such as plant structures are composed of tens to thousands of components. In designing a building, a great deal of effort is required to minimize indicators such as weight and cost while satisfying the required constraints for each of these many component components. The design work of a building is carried out through trial and error, for example, by repeatedly changing the cross-sectional shape of each component that makes up the building and performing structural analysis. However, given the limited time allotted to a designer, there are cases where the design work must be completed before sufficient trial and error has been completed.

[0003] To solve these problems, there are technologies relating to architectural design support, such as those in Patent Documents 1 to 3. Patent Document 1 discloses an optimum design device that performs steel frame cross-sectional design using an optimization algorithm (genetic algorithm). This device is equipped with an approximate optimization calculation device that uses approximate expressions for discrete design variable data such as member cross-sectional dimensions, and a detailed optimization calculation device that uses variable data, thereby automatically performing two-stage optimization calculations in succession, and is said to be able to obtain an optimum solution for a good frame structure even when there is a large amount of design variable data.

[0004] Patent Document 2 discloses a design support device that includes a model generation unit that converts a three-dimensional model (CAD) of a building into a structural analysis model for structural calculations, and a cross-section calculation unit that performs structural calculations and calculates cross sections by repeatedly enlarging the cross sections of structural members included in the structural analysis model until a predetermined standard is met. This device is said to be able to design a cross section that satisfies the predetermined tolerance by enlarging the cross section when the stress generated in a structural member exceeds a predetermined tolerance.

[0005] Patent Document 3 discloses a structural design system that creates analytical models, performs structural calculations, and modifies cross sections for frame structures, and is said to be able to reduce the effort required for designing frame structures. In particular, by using cross section list data prepared in advance for cross section modification, the system claims to be able to efficiently design optimized cross sections by repeatedly performing a process based on the results of FEM analysis and strength evaluation, in which the cross section dimensions of members that do not satisfy the strength conditions are increased by one rank, and the cross section dimensions of sections that have strength margins are decreased by one rank. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Japanese Patent Application Laid-Open No. 2001-134628 [Patent Document 2] Japanese Patent Application Publication No. 2019-168838 [Patent Document 3] Japanese Patent Application Laid-Open No. 2010-152857 Summary of the Invention [Problem to be solved by the invention]

[0007] However, the above-mentioned Patent Documents 1 to 3 have the following problems: Patent Document 1 requires many structural analyses to calculate the sensitivity to design parameters, and the structural analyses still take a lot of time. This method requires a lot of time even when correcting only a portion of the cross section, making it difficult to respond when changes to the arrangement of components occur.

[0008] Furthermore, in Patent Document 2, the cross section is enlarged when the stress acting on the member exceeds the allowable value, so although it is possible to satisfy the allowable value, it does not take into consideration the design for efficiency such as reducing weight as much as possible. Furthermore, since structural calculations must be performed every time a member is changed, cross section changes and structural analysis must be repeated, which takes a lot of time.

[0009] Furthermore, in Patent Document 3, an FEM analysis must be performed every time the dimensions of a component are changed by one rank, which also takes a lot of time. In particular, when performing FEM analysis using time history response analysis, the calculation time per analysis is long, making it unrealistic to perform multiple iterative calculations. Furthermore, since the above process is performed for all components, if there are a large number of components, the number of design parameters will increase, which will increase the number of iterations required to obtain an optimal solution, requiring a long time, or it is possible that the optimal solution will not converge.

[0010] At least one embodiment of the present disclosure has been made in consideration of the above-mentioned circumstances, and aims to provide a building design support device and a building design support method for obtaining a structural analysis model in a short period of time for efficient design. [Means for solving the problem]

[0011] In order to solve the above problems, a building design support device according to at least one embodiment of the present disclosure includes: A building design support device for supporting the design of a building using a structural analysis model, a structural analysis unit for calculating cross-sectional forces acting on a plurality of member elements included in the structural analysis model by performing a structural analysis using the structural analysis model; a constraint condition parameter calculation unit for calculating constraint condition parameters for each of the plurality of member elements based on the cross-sectional forces; an adjustment target component element selection unit for selecting at least one adjustment target component element from the plurality of component elements based on whether the constraint condition parameter satisfies a preset constraint condition; a cross-sectional shape adjusting unit for adjusting a cross-sectional shape of the at least one adjustment target member element; Equipped with The cross-sectional shape adjustment unit repeatedly adjusts the cross-sectional shape of the at least one member to be adjusted until at least one of a first termination condition, in which the constraint condition parameters satisfy the constraint conditions for each of the multiple member elements, or a second termination condition, in which the calculation results of the constraint condition parameters due to the adjustment of the cross-sectional shape by the cross-sectional shape adjustment unit converge, is met.

[0012] In order to solve the above problems, a building design support method according to at least one embodiment of the present disclosure includes: A building design support method for supporting the design of a building using a structural analysis model, comprising: a step of calculating cross-sectional forces acting on a plurality of member elements included in the structural analysis model by performing a structural analysis using the structural analysis model; calculating constraint condition parameters for each of the plurality of member elements based on the cross-sectional forces; selecting at least one adjustment target member element from the plurality of member elements based on whether or not the constraint condition parameter satisfies a preset constraint condition; adjusting a cross-sectional shape of the at least one adjustment target member element; Equipped with The process of adjusting the cross-sectional shape involves repeatedly adjusting the cross-sectional shape of the at least one member to be adjusted until at least one of the following conditions is met: a first termination condition, in which the constraint condition parameters satisfy the constraint conditions for each of the multiple member elements; or a second termination condition, in which the calculation results of the constraint condition parameters due to the adjustment of the cross-sectional shape by the cross-sectional shape adjustment unit converge. [Effects of the Invention]

[0013] According to at least one embodiment of the present disclosure, it is possible to provide a building design support device and a building design support method for obtaining a structural analysis model in a short time period in order to perform efficient design. [Brief explanation of the drawings]

[0014] [Figure 1] 1 is a configuration diagram of a building design support device according to an embodiment. [Figure 2] 2 is an example of a structural analysis model stored in a structural analysis model storage unit of FIG. 1. [Figure 3] 1 is a flowchart illustrating a building design support method according to an embodiment. [Figure 4] 10 is an example of a cross-sectional shape list. [Figure 5] 4 is an example of a calculation result showing a transition of the weight of a building with respect to the number of times the processing of steps S103 to S107 in FIG. 3 is repeated. [Figure 6] 4 is an example of a calculation result showing a transition of weight distribution of member elements with respect to constraint condition parameters with respect to the number of times steps S103 to S107 in FIG. 3 are repeated. [Figure 7] 4 is a flowchart showing a method for adjusting a cross-sectional shape in step S104 of FIG. 3. [Figure 8] FIG. 2 is a schematic diagram showing a cross-sectional shape of a member element. [Figure 9] 10 is a flowchart showing another method for adjusting the cross-sectional shape in step S104 of FIG. 3. [Figure 10] 4 is a flowchart showing a building design support method according to a modified example of FIG. 3. DETAILED DESCRIPTION OF THE INVENTION

[0015] Hereinafter, several embodiments of the present disclosure will be described with reference to the accompanying drawings. However, the dimensions, materials, shapes, relative arrangements, etc. of components described as embodiments or shown in the drawings are merely illustrative examples and are not intended to limit the scope of the present disclosure.

[0016] The building design support device is a device for supporting the design of a building using a structural analysis model. The building to be designed includes any building composed of multiple components. In the embodiment described below, a steel frame structure composed of multiple steel frame components will be described as an example of a building.

[0017] The hardware configuration of the architectural design support device includes, for example, a CPU (Central Processing Unit), RAM (Random Access Memory), ROM (Read Only Memory), and computer-readable storage media. The series of processes for realizing various functions are stored in storage media, for example, in the form of a program. The CPU reads this program into RAM and executes information processing and arithmetic operations to realize various functions. The program may be pre-installed in a ROM or other storage medium, provided in a state stored in a computer-readable storage medium, or distributed via wired or wireless communication means. Examples of computer-readable storage media include magnetic disks, magneto-optical disks, CD-ROMs, DVD-ROMs, and semiconductor memories.

[0018] 1 is a configuration diagram of a building design support device 100 according to one embodiment. The building design support device 100 is configured to include a structural analysis model storage unit 102, a structural analysis unit 104, a constraint condition parameter calculation unit 106, an adjustment target member element selection unit 108, a cross-sectional shape adjustment unit 110, and a termination condition determination unit 112.

[0019] 1 is one example of the configuration of the building design support device 100, and is not limited as long as equivalent functions can be realized. For example, functional blocks for realizing the functions of the building design support device 100 may be integrated, or specific functional blocks may be further subdivided. Also, some of the devices may be located in geographically distant locations and operate in cooperation with each other via a communication means such as a network, resulting in, for example, a cloud-like configuration.

[0020] The structural analysis model storage unit 102 is configured to store a structural analysis model M used in the design of a building. The structural analysis model M includes a plurality of member elements corresponding to the plurality of members that make up the building to be designed. Various parameters that define the design specifications (e.g., size, shape, weight, material, etc.) and constraints that must be satisfied in the design are defined for the plurality of member elements.

[0021] Fig. 2 shows an example of the structural analysis model M stored in the structural analysis model storage unit 102 of Fig. 1. Fig. 2 shows a virtual model including multiple member elements 2 corresponding to steel frame members as the structural analysis model M corresponding to a building (steel frame structure) (one representative member element 2 is highlighted in Fig. 2 compared to the other member elements). Each of the multiple member elements 2 is assigned an identifying member number, a cross-sectional area A (area in a cross section perpendicular to the longitudinal direction of the member element 2) as a design specification, and allowable values ​​for the "stress ratio," "deflection ratio," and "slenderness ratio" as constraints.

[0022] In addition, the "stress ratio" is the ratio to the allowable value (allowable stress) of the stress acting on the member element 2, the "deflection ratio" is the ratio to the allowable value of the deflection occurring in the member element 2 due to the cross-sectional force (allowable deflection determined based on the length L of the member element 2), and the "slenderness ratio ratio" is the ratio to the allowable value (slenderness ratio limit value) of the slenderness ratio (slenderness ratio λ = Lb / i; buckling length Lb, cross-sectional radius i), which is a dimensionless quantity indicating the slenderness of the member element 2.

[0023] The structural analysis unit 104 is configured to perform structural analysis using the structural analysis model M. The structural analysis is performed using the structural analysis model M stored in the structural analysis model storage unit 102, and the cross-sectional forces F acting on the multiple member elements 2 included in the structural analysis model M are calculated. The cross-sectional forces F, which are the analysis results, can also be calculated for each component, such as Fx: axial force, Fy: shear force in the y-axis direction, Fz: shear force in the z-axis direction, Mx: torsional moment, My: bending moment about the y-axis, and Mz: bending moment about the z-axis.

[0024] The constraint condition parameter calculation unit 106 is configured to calculate constraint condition parameters P for each of the multiple member elements 2 based on the section forces F calculated by structural analysis in the structural analysis unit 104. The constraint condition parameters P are parameters corresponding to the constraint conditions defined in the structural analysis model M, and can be calculated based on the section forces F obtained by structural analysis.

[0025] The adjustment target member element selection unit 108 is configured to select at least one adjustment target member element 8 from the plurality of member elements 2. The plurality of member elements 2 included in the structural analysis model M can be selected by the adjustment target member element selection unit 108, and the cross-sectional shape of the selected member element (adjustment target member element 8), which is a design specification, can be arbitrarily changed by the cross-sectional shape adjustment unit 110 described next.

[0026] The cross-sectional shape adjustment unit 110 is configured to adjust the cross-sectional shape of at least one member element 8 to be adjusted selected by the member element to be adjusted selection unit 108. The specific adjustment of the cross-sectional shape by the cross-sectional shape adjustment unit 110 will be described in detail later. Note that, although the present embodiment illustrates a case where the cross-sectional shape of the design specifications defined for each member element 2 is the object to be adjusted, other design specifications (for example, the length, weight, material, etc. of the member element 2) may also be the object to be adjusted.

[0027] The termination condition determination unit 112 is configured to determine a termination condition for terminating the update of the structural analysis model M, which will be described later. The calculation of the constraint condition parameters P by the constraint condition parameter calculation unit 106, the selection of the adjustment target member elements 8 by the adjustment target member element selection unit 108, and the cross-sectional shape adjustment by the cross-sectional shape adjustment unit 110 are repeatedly performed as necessary, and the termination condition determination unit 112 specifies a condition for terminating the repeated processing.

[0028] Next, a description will be given of a building design support method that can be implemented by the building design support device 100 having the above configuration. Fig. 3 is a flowchart showing a building design support method according to one embodiment.

[0029] First, the structural analysis unit 104 acquires the structural analysis model M from the structural analysis model storage unit 102 (step S100), and performs structural analysis (step S101) using the acquired structural analysis model M. In step S101, as a result of the structural analysis, a cross-sectional force F acting on each of the plurality of member elements 2 included in the structural analysis model M is calculated.

[0030] Next, the constraint parameter calculation unit 106 calculates the constraint parameter P for each member element 2 based on the cross-sectional force F calculated in step S101 (step S102). For example, when a stress ratio is used as the constraint parameter P, the stress value acting on each member element 2 is determined based on the cross-sectional force F calculated in step S101, and the stress ratio is calculated as the ratio to the allowable stress value associated with the member element 2. The same applies when the deflection ratio or slenderness ratio ratio is used as the constraint parameter P, as described above.

[0031] Next, the adjustment target member element selection unit 108 selects at least one adjustment target member element 8 from the plurality of member elements 2 (step S103). The selection of the adjustment target member element 8 in step S103 is performed based on whether or not the constraint condition parameter P calculated in step S102 satisfies a preset constraint condition. In this embodiment, the constraint condition parameter P is treated as a stress ratio, and the constraint condition is defined as, for example, "the stress ratio is 0.9 or more and 1.0 or less." In this case, the adjustment target member element selection unit 108 selects a member element that does not satisfy the constraint condition (i.e., a member element whose stress ratio calculated in step S102 is less than 0.9 or more than 1.0) as the adjustment target member element 8.

[0032] The above constraints are merely examples, and the various limit values ​​included in the constraints can be set arbitrarily.

[0033] Next, the cross-sectional shape adjustment unit 110 adjusts the cross-sectional shape of the adjustment target member element 8 selected in step S103 (step S104). In step S104, the cross-sectional shape is adjusted as a parameter that affects the constraint condition parameter P among the specifications of the adjustment target member element 8.

[0034] The cross-sectional shape may be adjusted by selecting one from a cross-sectional shape list 10 that defines a plurality of cross-sectional shape candidates 4. FIG. 4 shows an example of the cross-sectional shape list 10. In the cross-sectional shape list, a feature quantity (cross-sectional area A) corresponding to the constraint parameter P is defined for each cross-sectional shape candidate 4. In FIG. 4, for each cross-sectional shape candidate 4, an identification cross-sectional shape candidate number, a cross-section name, and a cross-sectional area A are shown, as well as predicted values ​​of the constraint parameters (stress ratio, deflection ratio, slenderness ratio ratio) that are predicted when the cross-sectional force F calculated in the structural analysis of step S101 is applied.

[0035] The cross-sectional shape adjustment unit 110 uses this cross-sectional shape list 10 to select the cross-sectional shape candidate with the smallest feature value from among the cross-sectional shape candidates whose constraint condition parameter P satisfies the constraint condition. In the example of Fig. 4, for each cross-sectional shape candidate 4, the cross-sectional shape candidate 4 with the predicted values ​​of the stress ratio, deflection ratio, and slenderness ratio satisfying the constraint condition and having the smallest feature value (cross-sectional area) (see the cross-sectional shape candidate 4 surrounded by the dashed line in Fig. 4) is selected as the member element 8 to be adjusted.

[0036] After adjusting the cross-sectional shape of each member element 8 to be adjusted, the cross-sectional shape adjustment unit 110 updates the structural analysis model M so that it includes member elements 2 having the adjusted cross-sectional shape (step S105). Hereinafter, when the updated structural analysis model needs to be distinguished from the structural analysis model before the update, it will be appropriately indicated by the symbol M'.

[0037] The structural analysis unit 104 performs structural analysis again using the structural analysis model M' updated in step S105 (step S106). Then, the constraint condition parameter calculation unit 106 calculates the constraint condition parameters P again based on the cross-sectional force F calculated by the structural analysis in step S106 (step S107).

[0038] Next, the termination condition determination unit 112 determines whether or not the termination condition is satisfied based on the calculation result of step S107 (step S108). The above steps S103 to S107 are repeatedly performed as necessary, and in step S108, a condition determination is made to terminate the repetition.

[0039] In this embodiment, the termination condition is determined to be satisfied when at least one of the first termination condition and the second termination condition is satisfied. The first termination condition is determined to be satisfied when the constraint condition parameters P of the plurality of member elements 2 satisfy the respective constraint conditions based on the constraint condition parameters P calculated in step S107. In other words, the above-mentioned repetitive processing ends when the constraint condition parameters P of all member elements 2 can satisfy the constraint conditions by adjusting the cross-sectional shapes. On the other hand, the second termination condition is determined to be satisfied when at least one of the following conditions is satisfied: the calculation result of the constraint condition parameters P by adjusting the cross-sectional shapes converges; or the like. In other words, the above-mentioned repetitive processing ends when the constraint condition parameters P of each member element 2 have sufficiently converged as a result of the above-mentioned repetitive processing. The termination condition determined in step S108 may be set to satisfy both the first and second termination conditions.

[0040] If the termination condition is not satisfied (step S108: NO), the process returns to step S103, and the above steps are repeatedly performed. These processes are repeated until the termination condition is satisfied. If the termination condition is satisfied (step S108: YES), the updated structural analysis model M' is stored in the structural analysis model storage unit 102 (step S109), and the series of processes is terminated.

[0041] A specific calculation example using the above-mentioned building design support method will now be described with reference to Figures 5 and 6. Figure 5 is an example of a calculation result showing the transition of the building weight with respect to the number of times steps S103 to S107 in Figure 3 are repeated, and Figure 6 is an example of a calculation result showing the transition of the weight distribution of member elements 2 with respect to the constraint parameter P (stress ratio) with respect to the number of times steps S103 to S107 in Figure 3 are repeated. Figure 5 shows the weight breakdown for each floor of the building.

[0042] As shown in Figure 5, as the number of iterations increases, the total weight of the multiple member elements included in the structural analysis model M is efficiently reduced. Also, as shown in Figure 6, as the number of iterations increases, the stress ratio distribution of member element 2 changes, with the peak shifting to near 1.0, which is the upper limit allowable value for the stress ratio. Generally, as the stress ratio approaches 1.0, a lean design (a design that is lighter in weight) is obtained. Therefore, these results mean that as the number of iterations increases, the cross-sectional shape of each member element 2 included in the structural analysis model M is optimized within the range in which the constraints are satisfied, and a lean structural analysis model M is obtained.

[0043] In this embodiment, the feature to be adjusted in step S104 is the cross-sectional area A, but other indices may be used as the feature. For example, by setting cost as the feature, it is possible to optimize the structural analysis model M so as to minimize the cost.

[0044] In the above embodiment, a method for adjusting the cross-sectional shape using the cross-sectional shape list 10 in step S104 was described, but the cross-sectional shape may also be adjusted by changing at least one of the multiple shape parameters Pc that define the cross-sectional shape without using such a cross-sectional shape list 10.

[0045] Fig. 7 is a flowchart showing the method for adjusting the cross-sectional shape in step S104 of Fig. 3. First, the cross-sectional shape adjustment unit 110 identifies the principal components of the cross-sectional force F based on the results of the structural analysis in step S101 (step S200). As described above, the cross-sectional force F includes the following components: Fx: axial force, Fy: shear force in the y-axis direction, Fz: shear force in the z-axis direction, Mx: torsional moment, My: bending moment about the y-axis, and Mz: bending moment about the z-axis. Therefore, the principal components are identified by comparing each of these components.

[0046] The principal components can be identified in step S200, for example, by the following methods. In the first method, the generated stresses (axial stress fa (=Fx / A), shear stress (y-axis) fyz (=Fy / Ay), bending stress (about the z-axis) fbz (=Mz / Zz), bending stress (about the y-axis) fby (=My / Zy)) are calculated for each component of the section force F (axial force Fx, shear force in the y-axis direction Fy, bending moment about the y-axis My, bending moment about the z-axis Mz), and the principal components can be identified by comparing the magnitudes of these. Here, A is the cross-sectional area, Ay is the shear cross-sectional area (in the y-axis direction), Zy is the section modulus (about the y-axis), and Zz is the section modulus (about the z-axis).

[0047] In the second method, the ratios R1 to R4 between the above stress and the allowable value of each stress component are calculated using the following formula, and the component with the largest value among the ratios R1 to R4 may be identified as the principal component (for example, if R1 is the largest, the axial force Fx is identified as the principal component). R1=fa / FT R2=fyz / FV R3=fbz / FTz R4=fby / FTy In addition, FT is the allowable value of axial stress fa, FV is the allowable value of shear stress fyz, FTz is the allowable value of bending stress (around the z-axis) fbz, and FTy is the allowable value of bending stress (around the y-axis) fby.

[0048] Next, the cross-sectional shape adjustment unit 110 changes the shape parameter Pc of the cross-sectional shape corresponding to the dominant component identified in step S200 (step S201).

[0049] 8 is a schematic diagram showing the cross-sectional shape 6 of the structural element 2. In FIG. 8, an H-shaped cross section having a flange portion 6a and a web 6b is shown as an example of the cross-sectional shape 6 of the structural element 2, and flange widths wf1, wf2, flange thicknesses tf1, tf2, web height hw, and web thickness tw are shown as multiple shape parameters Pc for defining the H-shaped cross section. These shape parameters Pc are associated in advance with the principal components of the cross-sectional force F. Based on this correspondence, the cross-sectional shape adjustment unit 110 adjusts the cross-sectional shape 6 by changing the shape parameters Pc corresponding to the principal components identified in step S200.

[0050] As a specific example, if the principal component is the bending moment My about the y-axis, the web height hw, which is a shape parameter Pc that is previously associated with the bending moment My about the y-axis, is changed. Such a correspondence relationship between the principal component and the shape parameter Pc is defined by verifying it in advance using an empirical or simulation method.

[0051] The change of the shape parameters Pc in step S201 is performed so that the changed constraint condition parameters P more suitably satisfy the constraint conditions. Such change of the shape parameters Pc may be performed by continuously changing the shape parameters Pc or discretely changing them (for example, at a predetermined interval).

[0052] 7 and 8, it is possible to adjust the cross-sectional shape without using the above-mentioned cross-sectional shape list 10. Therefore, it is useful when it is difficult to prepare the cross-sectional shape list 10 or when adjustment using the cross-sectional shape list 10 cannot be performed suitably.

[0053] Fig. 9 is a flowchart showing another method for adjusting the cross-sectional shape in step S104 of Fig. 3. In this example, the cross-sectional shape adjustment unit 110 first adjusts the cross-sectional shape using a method that uses the cross-sectional shape list 10 (step S300), and determines whether this adjustment is possible (step S301). As a result, if the cross-sectional shape adjustment is possible (step S301: YES), the cross-sectional shape adjustment is performed using the cross-sectional shape list 10 (step S302). On the other hand, if the cross-sectional shape adjustment is not possible (step S301: NO), the cross-sectional shape adjustment is performed by changing the shape parameters corresponding to the principal components of the cross-sectional force F according to a method that does not use the cross-sectional shape list 10 (see Fig. 7) (step S303).

[0054] In this way, according to this method, when it is difficult to adjust the cross-sectional shape using the method using the cross-sectional shape list 10, by switching to this method, it is possible to perform flexible cross-sectional shape adjustment that does not depend on the cross-sectional shape list 10.

[0055] Fig. 10 is a flowchart showing a building design support method according to a modified example of Fig. 3. Fig. 10 differs from Fig. 3 in that step S105' is added. In step S105', the structural analysis unit 104 updates the load conditions for the structural analysis model M when the structural analysis model M is updated in step S104.

[0056] For example, when a building is designed using a structural analysis method in which seismic forces are applied according to the Ai distribution (the distribution of earthquake story shear force coefficients in the height direction as specified in the Building Standards Act), adjusting the cross-sectional shape in step S104 changes the seismic force that is input to the structural analysis model M in the structural analysis. Therefore, by updating the load in step S105', the seismic force corresponding to the cross-sectional shape adjusted by the cross-sectional shape adjustment unit 110 is calculated, and this is reflected in the structural analysis, allowing for accurate response calculations, thereby enabling more accurate optimization of the cross-sectional shape.

[0057] When a time history response analysis is performed, it is not necessary to update the load conditions in step S105'.

[0058] As described above, in each of the above embodiments, the cross-sectional shape adjustment unit 110 calculates the optimal cross-section that minimizes the weight for the cross-sectional force F calculated by the structural analysis unit 104. However, since there is no need to repeat the structural analysis, the computational burden for improving the efficiency of the structural analysis model M is reduced, and an optimized structural analysis model M can be obtained in a short period of time.

[0059] Furthermore, when the cross-sectional shape adjustment unit 110 changes the cross-sectional shape of the member element 8 to be adjusted, the cross-sectional force F acting on each member element 2 also changes due to the effect of the load redistribution on each member element 2, but by performing the above-mentioned repetitive process, it becomes possible to design the cross-section of each member element 2 taking the load redistribution into consideration. Such repetitive process requires the structural analysis to be repeated again in step S106, but because this is repeated until the effect of the load redistribution converges, the number of times the structural analysis is performed can be significantly reduced compared to conventional methods (in conventional methods, when the cross-sectional shape is changed, the structural analysis had to be repeated until both the effect on the constraint condition parameter P such as the stress ratio and the effect on the load redistribution converge, resulting in an extremely large number of repetitions of the structural analysis).

[0060] Furthermore, the adjustment target member element selection unit 108 can reduce the number of member elements 2 to be adjusted by selecting some of the multiple member elements 2 that make up the structural analysis model M as member elements 8 to be adjusted. This reduces the computational load required for structural analysis, and because the number of member elements to be adjusted is small, the impact of redistribution of cross-sectional force F when the cross-sectional shape is changed is reduced, improving the convergence of the iterative process and achieving further efficiency.

[0061] In addition, within the scope of the present disclosure, the components in the above-described embodiments may be replaced with well-known components as appropriate, and the above-described embodiments may be combined as appropriate.

[0062] The contents described in each of the above embodiments can be understood, for example, as follows.

[0063] (1) A building design support device according to one aspect includes: A building design support device (for example, the building design support device 100 of the above embodiment) for supporting the design of a building using a structural analysis model (for example, the structural analysis model M of the above embodiment), a structural analysis unit (for example, the structural analysis unit 104 in the above embodiment) for calculating cross-sectional forces (for example, the cross-sectional forces F in the above embodiment) acting on a plurality of member elements (for example, the member elements 2 in the above embodiment) included in the structural analysis model by performing a structural analysis using the structural analysis model; a constraint parameter calculation unit (for example, the constraint parameter calculation unit 106 in the above embodiment) for calculating constraint parameters (for example, the constraint parameter P in the above embodiment) for each of the plurality of member elements based on the cross-sectional forces; an adjustment target component element selection unit (for example, the adjustment target component element selection unit 108 in the above embodiment) for selecting at least one adjustment target component element (for example, the adjustment target component element 8 in the above embodiment) from the plurality of component elements based on whether or not the constraint condition parameter satisfies a preset constraint condition; a cross-sectional shape adjusting unit (for example, the cross-sectional shape adjusting unit 110 in the above embodiment) for adjusting the cross-sectional shape of the at least one adjustment target member element; Equipped with The cross-sectional shape adjustment unit repeatedly adjusts the cross-sectional shape of the at least one member to be adjusted until at least one of a first termination condition, in which the constraint condition parameters satisfy the constraint conditions for each of the multiple member elements, or a second termination condition, in which the calculation results of the constraint condition parameters due to the adjustment of the cross-sectional shape by the cross-sectional shape adjustment unit converge, is met.

[0064] According to the above aspect (1), the structural analysis model can be optimized by repeatedly selecting, from among the multiple member elements constituting the structural analysis model, member elements whose constraint condition parameters do not satisfy the constraint conditions for the cross-sectional forces calculated by the structural analysis, and adjusting the cross-sectional shapes of the selected member elements. This iterative process significantly reduces the number of structural analyses performed compared to conventional methods, and can obtain an optimized structural analysis model in a short period of time.

[0065] (2) In another embodiment, in the above embodiment (1), The cross-sectional shape adjustment unit repeatedly adjusts the cross-sectional shape of the at least one adjustment target member until both the first end condition and the second end condition are satisfied.

[0066] According to the above aspect (2), the cross-sectional shape adjustment for the adjustment target member elements is repeatedly performed until the constraint condition parameters for the plurality of member elements satisfy the constraint conditions and the calculation results of the constraint condition parameters converge, thereby obtaining a more appropriate structural analysis model.

[0067] (3) In another aspect, in the above aspect (1) or (2), The cross-sectional shape adjustment unit adjusts the cross-sectional shape by selecting one from a cross-sectional shape list (e.g., cross-sectional shape list 10 in the above embodiment) that specifies multiple cross-sectional shape candidates (e.g., cross-sectional shape candidate 4 in the above embodiment).

[0068] According to the above aspect (3), the cross-sectional shape of the adjustment target component element is adjusted by selecting one of a plurality of cross-sectional shape candidates defined in the cross-sectional shape list. In this way, by adjusting the cross-sectional shape by selecting from the candidates registered in the list in advance, it is possible to optimize the structural analysis model with less computational burden.

[0069] (4) In another embodiment, in the above embodiment (3), the cross-sectional shape list defines a feature amount for each of the cross-sectional shape candidates; The cross-sectional shape adjustment unit selects the cross-sectional shape candidate whose constraint condition parameters satisfy the constraint conditions and that minimizes the feature amount.

[0070] According to the above aspect (4), it is possible to suitably adjust the cross-sectional shape so that the predetermined feature amount becomes the minimum within a range in which the constraint condition parameters satisfy the constraint conditions.

[0071] (5) In another embodiment, in the above embodiment (4), The feature amount is a cross-sectional area.

[0072] According to the above aspect (5), the cross-sectional shape of the member element can be suitably adjusted to minimize the cross-sectional area within the range where the constraint parameters satisfy the constraints, thereby enabling efficient design in a short time by reducing the weight of the building while satisfying the constraints.

[0073] (6) In another aspect, in the above aspect (1) or (2), The cross-sectional shape adjustment unit adjusts the cross-sectional shape by changing at least one of a plurality of shape parameters that define the cross-sectional shape (for example, the shape parameter Pc in the above embodiment).

[0074] According to the above aspect (6), the cross-sectional shape is adjusted by changing the shape parameters that define the cross-sectional shape, which allows for flexible adjustment of the cross-sectional shape without being restricted by the cross-sectional shape candidates predefined in the cross-sectional shape list.

[0075] (7) In another embodiment, in the above embodiment (6), The cross-sectional shape adjustment unit changes the shape parameters corresponding to the principal components of the cross-sectional forces.

[0076] According to the above aspect (7), the cross-sectional shape is adjusted by changing the shape parameters corresponding to the principal components of the cross-sectional force, thereby making it possible to efficiently search for an optimal cross-sectional shape.

[0077] (8) In another embodiment, in any one of the above (1) to (7), When the cross-sectional shape adjustment unit adjusts the cross-sectional shape, the structural analysis unit updates the load conditions for the structural analysis model including the adjustment-target member element whose cross-sectional shape has been adjusted.

[0078] According to the above aspect (8), when the structural analysis model is updated by adjusting the cross-sectional shape, the loading conditions for the structural analysis model are updated. In this way, accurate responses can be calculated by changing the loading conditions, such as seismic force, which are inputs to the structural analysis model in the structural analysis, and therefore, more accurate optimization of the cross-sectional shape is possible.

[0079] (9) In another embodiment, in any one of the above (1) to (8), The constraint condition parameter is a ratio between a parameter calculated based on the section force and a preset allowable value for the parameter.

[0080] According to the above aspect (9), the constraint condition parameters are defined as parameters calculated based on the section forces and normalized by the allowable values.

[0081] (10) A building design support method according to one aspect includes: A building design support method for supporting the design of a building using a structural analysis model (for example, the structural analysis model M of the above embodiment), a step of calculating cross-sectional forces (e.g., cross-sectional forces F in the above embodiment) acting on a plurality of member elements (e.g., member elements 2 in the above embodiment) included in the structural analysis model by performing a structural analysis using the structural analysis model; a step of calculating constraint condition parameters (for example, the constraint condition parameters P in the above embodiment) for each of the plurality of member elements based on the cross-sectional forces; a step of selecting at least one adjustment target member element (for example, the adjustment target member element 8 in the above embodiment) from the plurality of member elements based on whether or not the constraint condition parameter satisfies a preset constraint condition; adjusting a cross-sectional shape of the at least one adjustment target member element; Equipped with The process of adjusting the cross-sectional shape involves repeatedly adjusting the cross-sectional shape of the at least one member to be adjusted until at least one of the following conditions is met: a first termination condition, in which the constraint condition parameters satisfy the constraint conditions for each of the multiple member elements; or a second termination condition, in which the calculation results of the constraint condition parameters due to the adjustment of the cross-sectional shape by the cross-sectional shape adjustment unit converge.

[0082] According to the above aspect (10), the structural analysis model can be optimized by repeatedly selecting, from among the multiple member elements constituting the structural analysis model, member elements whose constraint condition parameters do not satisfy the constraint conditions for the cross-sectional forces calculated by the structural analysis, and adjusting the cross-sectional shapes of the selected member elements. This iterative process significantly reduces the number of structural analyses performed compared to conventional methods, and can obtain an optimized structural analysis model in a short period of time. [Explanation of symbols]

[0083] 2 Member elements 4 Cross-sectional shape candidates 6 Cross-sectional shape 6a Flange 6b Web 8. Adjustment target component elements 10 Cross-sectional shape list 100 Building design support equipment 102 Structural analysis model memory section 104 Structural Analysis Department 106 Constraint parameter calculation unit 108 Adjustment target component element selection section 110 Cross-sectional shape adjustment section 112 Termination condition determination section

Claims

1. A building design support device for supporting the design of a building using a structural analysis model, a structural analysis unit for calculating cross-sectional forces acting on a plurality of member elements included in the structural analysis model by performing a structural analysis using the structural analysis model; a constraint condition parameter calculation unit for calculating constraint condition parameters for each of the plurality of member elements based on the cross-sectional forces; an adjustment target component element selection unit for selecting at least one adjustment target component element from the plurality of component elements based on whether the constraint condition parameter satisfies a preset constraint condition; a cross-sectional shape adjusting unit for adjusting the cross-sectional shape of the at least one adjustment target member element by selecting one from a cross-sectional shape list defining a plurality of cross-sectional shape candidates; Equipped with the cross-sectional shape list defines a feature amount for each of the cross-sectional shape candidates; the constraint condition parameters are ratios between parameters calculated based on the cross-sectional forces and preset allowable values ​​for the parameters, and include at least a stress ratio corresponding to the stress acting on the member element, a deflection ratio corresponding to the deflection occurring in the member element, and a slenderness ratio ratio corresponding to the slenderness of the member element; the cross-sectional shape adjustment unit selects a cross-sectional shape candidate whose feature amount is minimized from among the cross-sectional shape candidates whose stress ratio, deflection ratio, and slenderness ratio ratio among the constraint condition parameters satisfy the constraint conditions, respectively; The cross-sectional shape adjustment unit repeatedly adjusts the cross-sectional shape of at least one of the component elements to be adjusted until at least one of a first termination condition, in which the constraint condition parameters for each of the plurality of component elements satisfy the constraint conditions, or a second termination condition, in which the calculation result of the constraint condition parameters by the cross-sectional shape adjustment unit converges, is met.

2. 2. The architectural design support device according to claim 1, wherein the cross-sectional shape adjustment unit repeatedly adjusts the cross-sectional shape of the at least one adjustment target component element until both the first termination condition and the second termination condition are satisfied.

3. The architectural design support device according to claim 1 or 2, wherein the feature amount is a cross-sectional area.

4. The architectural design support device according to claim 1 , wherein the cross-sectional shape adjustment unit adjusts the cross-sectional shape by changing at least one of a plurality of shape parameters that define the cross-sectional shape.

5. The architectural design support device according to claim 4 , wherein the cross-sectional shape adjustment unit changes the shape parameter that is previously associated with a principal component having the largest ratio among a plurality of components included in the cross-sectional force.

6. 6. The architectural design support device according to claim 1, wherein when the cross-sectional shape is adjusted by the cross-sectional shape adjustment unit, the structural analysis unit updates the load conditions for the structural analysis model including the adjustment target component element whose cross-sectional shape has been adjusted.

7. A building design support device for supporting the design of a building using a structural analysis model, comprising: a structural analysis unit for calculating cross-sectional forces acting on a plurality of member elements included in the structural analysis model by performing a structural analysis using the structural analysis model; a constraint condition parameter calculation unit for calculating constraint condition parameters for each of the plurality of member elements based on the cross-sectional forces; an adjustment target component element selection unit for selecting at least one adjustment target component element from the plurality of component elements based on whether the constraint condition parameter satisfies a preset constraint condition; a cross-sectional shape adjusting unit for adjusting the cross-sectional shape of the at least one adjustment target member element by changing at least one of a plurality of shape parameters that define the cross-sectional shape; Equipped with the cross-sectional shape adjustment unit changes the shape parameter that is pre-associated with a principal component having the largest ratio among a plurality of components included in the cross-sectional force; The cross-sectional shape adjustment unit repeatedly adjusts the cross-sectional shape of at least one of the component elements to be adjusted until at least one of a first termination condition, in which the constraint condition parameters for each of the plurality of component elements satisfy the constraint conditions, or a second termination condition, in which the calculation result of the constraint condition parameters by the cross-sectional shape adjustment unit converges, is met.

8. A building design support method for a computer to support the design of a building using a structural analysis model, comprising: The computer a step of calculating cross-sectional forces acting on a plurality of member elements included in the structural analysis model by performing a structural analysis using the structural analysis model; calculating constraint condition parameters for each of the plurality of member elements based on the cross-sectional forces; selecting at least one adjustment target member element from the plurality of member elements based on whether or not the constraint condition parameter satisfies a preset constraint condition; adjusting the cross-sectional shape of the at least one adjustment target member element by selecting one from a cross-sectional shape list defining a plurality of cross-sectional shape candidates; Run the cross-sectional shape list defines a feature amount for each of the cross-sectional shape candidates; the constraint condition parameters are ratios between parameters calculated based on the cross-sectional forces and preset allowable values ​​for the parameters, and include at least a stress ratio corresponding to the stress acting on the member element, a deflection ratio corresponding to the deflection occurring in the member element, and a slenderness ratio ratio corresponding to the slenderness of the member element; In the step of adjusting the cross-sectional shape, a cross-sectional shape candidate that minimizes the feature amount is selected from among the cross-sectional shape candidates whose stress ratio, deflection ratio, and slenderness ratio ratio satisfy the constraint conditions, among the constraint condition parameters; A building design support method in which the process of adjusting the cross-sectional shape repeatedly adjusts the cross-sectional shape of at least one of the component elements to be adjusted until at least one of a first termination condition, in which the constraint condition parameters for the plurality of component elements satisfy the constraint conditions, or a second termination condition, in which the calculation results of the constraint condition parameters due to the adjustment of the cross-sectional shape converge, is met.

9. A building design support method in which a computer supports the design of a building using a structural analysis model, comprising: The computer a step of calculating cross-sectional forces acting on a plurality of member elements included in the structural analysis model by performing a structural analysis using the structural analysis model; calculating constraint condition parameters for each of the plurality of member elements based on the cross-sectional forces; selecting at least one adjustment target member element from the plurality of member elements based on whether or not the constraint condition parameter satisfies a preset constraint condition; adjusting a cross-sectional shape of the at least one adjustment target member element by changing at least one of a plurality of shape parameters that define the cross-sectional shape; Run In the step of adjusting the cross-sectional shape, the shape parameter that is previously associated with a principal component having the largest ratio among a plurality of components included in the cross-sectional force is changed, A building design support method in which the process of adjusting the cross-sectional shape repeatedly adjusts the cross-sectional shape of at least one of the component elements to be adjusted until at least one of a first termination condition, in which the constraint condition parameters for the plurality of component elements satisfy the constraint conditions, or a second termination condition, in which the calculation results of the constraint condition parameters due to the adjustment of the cross-sectional shape converge, is met.

Images