JP7186509B2 - Design support device, design support method and design support program - Google Patents

Description

The present technology relates to a design support device, a design support method, and a design support program.

2. Description of the Related Art Conventionally, a computer provided with an input operation means for input by a designer, a display means for displaying various screens, and an arithmetic processing unit for receiving an input signal from the input operation means, processing the signal, and outputting it to the display means. A system has been proposed (for example, Patent Document 1). This computer system has a database in which the size and structure of basic structural elements such as columns, beams, and floors according to the number of floors of the building are calculated and the standards are determined and recorded in advance. basic structural data setting means for setting basic structural data such as the number of X spans, the number of Y spans, the number of floors, the length of each span, the height of each floor, the type of structure, and the use of the building by operating the input operation means; Operation of basic structural element data setting means for searching from the database based on the number of floors and use of the building set by the basic structural data setting means and setting standards for the size and structure of the basic structural elements, and input operation means for the designer. change data setting means for setting change data obtained by changing the basic structural data and basic component data by means of; and image processing means for displaying, on a display means, structural model diagrams for each floor and each span of the structural model constructed by the structural model constructing means. there is

Japanese Patent Application Laid-Open No. 2003-343006 JP-A-2001-207521 JP 2010-250566 A JP 2015-060415 A

Conventionally, the size and structure of the basic structural elements of columns, beams, and floors according to the number of floors of the building have been structurally calculated and the standards have been determined in advance and recorded in a database. to set the basic structural data such as the number of X spans, the number of Y spans, the number of floors, the length of each span, the height of each floor, the type of structure and the use of the building, and the set number of floors and use of the building. A technique has been proposed in which a standard for the size and structure of basic components is set by searching a database based on the above. However, it was difficult to establish standards for the size and structure of members so that they could be applied to all designs.

An object of the present invention is to provide a technique for supporting structural design that satisfies a predetermined standard for the cross section of a building member.

A design support device according to the present invention reads a three-dimensional model of a building, which indicates the arrangement of building members including structural members, from a storage device, and sets the cross section of the building member included in the three-dimensional model to a temporary size. Structural calculations are performed using the model generation unit that converts the structural analysis model into a structural analysis model for structural calculation, and the structural analysis model is used to repeatedly expand the cross section of the structural members included in the structural analysis model until a predetermined standard is satisfied. and a section calculation unit that performs section calculation.

By repeating the process of enlarging the cross section so as to satisfy a predetermined standard, the cross section of the structural member can be designed to have an appropriate size. That is, it is possible to support structural design that satisfies a predetermined standard for the cross section of the building member.

In addition, the model generation unit arranges columns and girders in the structural analysis model based on the span and floor height entered by the user, and the section calculation unit responds to the use of the floor surface entered by the user. A standard load stored in advance in a storage device may be read out and used for structural calculation. In this way, structural calculations can be performed based on assumed standard loads.

In addition, a secondary member designing section for arranging the secondary members for the structural analysis model based on a predetermined rule is further provided, and the section calculation section calculates the section using the structural analysis model in which the secondary members are arranged. You can do it. In this way, secondary members such as small beams, studs, and wind resistant beams can be placed according to standard rules, and an analysis model can be created that can analyze the order of occurrence of hinges based on a more realistic stress state. can do.

In addition, for the main frame among the structural members, the order of enlarging the cross section and increasing the number of reinforcing bars is predetermined. is calculated, and when the maximum stress exceeds the allowable stress level, the cross section of the main frame may be enlarged and the number of reinforcing bars may be increased according to the order. By predetermining the order in which the cross section is enlarged and the number of reinforcing bars is increased, it is possible to avoid outputting a design in which, for example, a number of reinforcing bars are placed that does not fit in the cross section. It is possible to increase the number of reinforcing bars in a well-balanced manner.

Also, if the building has a reinforced concrete structure, the cross section calculation unit expands the cross section of the structural member in a predetermined order so that the maximum inter-story deformation angle satisfies a predetermined condition, and then the building has a cross section for each floor. The cross section of the structural member may be enlarged until the horizontal strength satisfies a predetermined required horizontal strength. By previously enlarging the cross section based on the maximum story drift angle, it is possible to reduce the amount of processing for enlarging the cross section of the structural member based on the retained horizontal strength in the secondary design. That is, a design that finally satisfies the standards required for the building can be completed early, and the number of repetitions of the process can be reduced.

When the building is a reinforced concrete structure and has load-bearing walls, the section calculation unit may switch between increasing or decreasing the load-bearing strength of the load-bearing walls based on the tower ratio of the building. It should be noted that this processing is performed together with the calculation of the retained horizontal strength, for example. By doing so, it is possible to select an appropriate design according to the failure mode. In other words, a cost-effective design can be realized by selecting either shear failure or bending failure.

When the building is a steel frame structure and has braces, the cross section of the braces or beams may be enlarged according to the βu value, which is the ratio of the sum of the horizontal strength of the load-bearing walls to the horizontal strength of the bearing walls. It should be noted that this processing is performed together with the calculation of the retained horizontal strength, for example. By using such criteria, it is possible to appropriately determine the members that bear the proof stress.

In addition, if the maximum stress generated in the cross section of the beam exceeds the allowable stress, the cross section of the beam is expanded in the order determined in advance, and the maximum value of the beam strength determined in advance , the beam width may be increased. In this way, it is possible to design a design that satisfies, for example, the user-designated maximum value of beam strength, and also satisfies structural requirements.

Further, the building structure quantity calculation unit may further include a building structure quantity calculation unit that calculates the structure quantity used in the building using the structural analysis model after the section calculation unit has expanded the cross section. In this way, it is possible to obtain an approximate value of the amount of material required by using the structural analysis model after the design support device performs the structural design so as to satisfy the predetermined criteria.

It should be noted that the contents described in the means for solving the problems can be combined as much as possible without departing from the problems and technical ideas of the present invention. In addition, the content of the means for solving the problem can be provided as a system including a computer or other device, a computer-executed method, or a computer-executed program. The program can also be run over a network. Alternatively, a recording medium holding the program may be provided.

According to the present invention, it is possible to support structural design that satisfies a predetermined standard for the cross section of a building member.

It is a block diagram which shows an example of a design support apparatus. It is a processing flow diagram showing an example of design support processing. 1 is a schematic perspective view showing an example of a structural analysis model; FIG. FIG. 4 is a schematic plan view showing an example of a structural analysis model; It is a figure which shows an example of the initial value of the cross section of a column. FIG. 4 is a processing flow diagram showing an example of automatic design of a main frame based on primary design; It is a figure which shows an example of matching with the main use of a floor surface, and load. It is a figure which shows an example of the table which defined the order of the enlargement of a cross section, and the increase in the number of reinforcing bars about the big beam in RC structure. FIG. 10 is a processing flow diagram showing an example of processing for automatically designing a main frame based on secondary design in the case of an RC structure; FIG. 10 is a processing flow diagram showing an example of processing for automatically designing a main frame based on secondary design in the case of an RC structure; FIG. 10 is a processing flow diagram showing an example of automatic design processing of the main frame based on the secondary design in the case of S construction. An example of the automatic design processing of the foundation is shown. An example of the automatic design processing of the foundation is shown.

An embodiment of the present invention will be described below with reference to the drawings.

<Device configuration>
FIG. 1 is a block diagram showing an example of a design support device according to the present invention. A design support device is a device for automating part of the design work of a building and reducing the burden on the user. The design support device arranges building members such as pillars and beams for building design data, performs structural calculations, and determines cross-sectional sizes of building members so as to satisfy predetermined standards.

The design support device 1 according to the present invention is a general computer, and has a communication I/F (Interface
) 11 , a storage device 12 , an input/output I/F (Interface) 13 , a processor 14 and a bus 15 .

The communication I/F 11 is, for example, a wired network card or a wireless communication module, and transmits/receives information to/from another computer via a network (not shown).

The storage device 12 includes main storage devices such as RAM (Random Access Memory) and ROM (Read Only Memory), and auxiliary storage devices (secondary storage devices) such as HDD (Hard-disk Drive), SSD (Solid State Drive), and flash memory. equipment). The main memory caches programs and data read by the processor and secures work areas for the processor. The auxiliary storage stores programs executed by the processor and design data expressed in accordance with standards such as BIM (Building Information Modeling).

The input/output I/F 13 is connected to, for example, input devices such as a keyboard, mouse, and touch panel, and output devices such as a printer. Through the input/output I/F 13, user operations are accepted and information is output to the user.

The processor 14 is an arithmetic processing device such as a CPU (Central Processing Unit), and performs each process according to the present embodiment by executing a program. Specifically, the processor 14 functions as a model generating unit 141 , a secondary member designing unit 142 , a cross section calculating unit 143 and a skeleton quantity calculating unit 144 .

The model generator 141 generates a structural analysis model, which is design information representing the structural frame of the building, based on the design BIM model, which is design information representing the design of the building. The secondary member design unit 142 arranges secondary members such as small beams, wind resistant beams, and studs in the structural analysis model. The cross-section calculation unit 143 performs structural calculation using the structural analysis model, and if the building does not meet a predetermined standard, it enlarges the cross-section of the main structure such as the girders and columns and the foundation, and in the case of RC structure Increase the amount of rebar. The frame quantity calculation unit 144 calculates the frame quantity such as the total amount of concrete, forms, reinforcing bars, steel frames, etc. based on the structural analysis model.

The components as described above are connected via the bus 15 . The design support device 1 does not have to include some components such as the communication I/F 11 and the input/output I/F 13, for example. Moreover, the design support apparatus 1 may output the result of the processing according to the present embodiment to another computer via a network (not shown) such as the Internet.

<Design support processing>
FIG. 2 is a processing flow diagram showing an example of design support processing according to this embodiment. The model generation unit 141 of the design support device 1 reads out a three-dimensional (3D) model showing the layout of building members including structural members, stored in advance in the storage device 12 (FIG. 2: S1). The three-dimensional model may be data that constitutes a BIM model. As the three-dimensional model, so-called CAD (Computer-Aided Design) data or other three-dimensional models may be used. For example, assume that a design BIM model, which is design information such as a 3D model representing the design of a building, is read. The design BIM model may be a 3D model generated by converting from a plane esquisse or the like created by the user. The model generation unit 141 also converts the design BIM model into a structural analysis model, and stores the converted structural analysis model in the storage device 12 (S2). Structural analysis model refers to design information such as a 3D model representing the structural skeleton of a building.

FIG. 3 is a schematic perspective view showing an example of the structural analysis model output in S2. FIG. 4 is a schematic plan view showing an example of the structural analysis model output in S2. Note that drawing of the wall surface is omitted in FIG. 3 and 4 are examples and do not represent the same building. The structural analysis model output in S2 is a model generation based on information including the span, floor height, column position, wall position, floor position, and floor usage entered by the user for the design BIM model. A part 141 is a simple BIM model in which columns, girders, and the like are arranged. At this time, the model generator 141 sets the initial value of a sufficiently small temporary size, such as the minimum size assumed, for the cross section of the column or girders.

As illustrated in FIG. 4, the girders are girders that are linearly connected via pillars for each attribute of an area such as a general area, a common area, or a low-rise area, and have a span (length) are given the same reference numerals, and the girders to which the same reference numerals are attached may be unified in cross section in the process described later. In addition, the same reference numerals (not shown) may be assigned to pillars on different floors arranged in a straight line, and the cross sections of the pillars having the same reference numerals may be unified in the process described later.

FIG. 5 is a diagram showing an example of initial values of cross sections of columns. The example of FIG. 5 shows examples of one-story to four-story buildings. The table in FIG. 5 also has attributes of b×D and reinforcing bars. The b×D field stores the cross-sectional size of the pillar. b is the width of the pillar (width of width), and D is the width of the pillar (depth). In addition, in the example of FIG. 5, the magnitude|size is represented with the code|symbol. In the reinforcing bar field, the number of main reinforcing bars in the depth direction and the material type of the reinforcing bars are connected with hyphens.

It should be noted that the initial values of the girders are similarly determined in advance. FIG. 5 shows an example of a reinforced concrete structure (RC structure). and girders. In the case of the steel structure, the girders may have separate members for the ends and center.

Further, the secondary member design unit 142 of the design support device 1 arranges secondary members in the structural analysis model output in S2 (FIG. 2: S3). In this step, secondary members such as small beams, studs, and wind resistant beams are arranged according to a predetermined rule. For example, the small girders are arranged at predetermined intervals between large girders so that a predetermined number of small girders are arranged for a floor surface of a predetermined area. The studs are placed at the ends of the walls. The wind-resistant beams are arranged above and below the opening provided in the wall.

In addition, the section calculation unit 143 of the design support device 1 automatically designs the main frame based on the primary design (Fig. 2: S4). Details of this step will be described with reference to FIG.

FIG. 6 is a processing flow diagram showing an example of automatic design of the main frame based on primary design. The section calculation unit 143 performs load calculation based on the structural analysis model in which the secondary members are arranged in S3 ( FIG. 6 : S11). In this step, an assumed load is calculated based on the load previously associated with the use of the floor surface.

FIG. 7 is a diagram showing an example of correspondence between the main uses of the floor surface and the load. In the example of Fig. 7, the force per unit area of the area where each use is set is associated with main uses such as roofs, living rooms, corridors, balconies, entrance halls, equipment rooms, roadways, warehouses, and so on. The size (N/m ² ) is stored. Using such load information, the magnitude of the load is calculated for each region of the floor surface. As for load information, a load load and a finish load may be defined and used.

In addition, the cross section calculation unit 143 performs stress analysis ( FIG. 6 : S12). In this step, the stress applied to the columns and girders is calculated. That is, the cross-section calculation unit 143 calculates the vertical stress and shear force per unit area that occur in members such as columns and girders. An existing method can be used to calculate the stress. Also, for each member, the stress that the member receives is calculated.

In addition, the section calculation unit 143 calculates the bending stress (edge stress) and shear stress for the columns and girders (S13). Edge stress and shear stress can be calculated by existing methods, for example, using section modulus.

Then, the cross-section calculator 143 determines whether the calculated edge stress degree and shear stress degree exceed the allowable stress degree (S14). The allowable stress level is determined according to the cross-sectional area of the building member, the number of main rebars, the material type, and the like. Also, in this step, it is determined whether the stress of the main frame such as columns and girders does not exceed the allowable stress.

When it is determined that the bending stress applied to the member of the structural analysis model exceeds the predetermined allowable stress level (S14: NO), the cross section calculator 143 enlarges the cross section of the member (S15). For example, it is assumed that a plurality of combinations of beam length, beam width, number of rebars, and material type, whose initial values are shown in FIG.

FIG. 8 is a diagram showing an example of a table defining the order of enlargement of the cross section and increase in the number of reinforcing bars for large beams of RC construction. In S15, processing for enlarging the cross section of the member and increasing the number of reinforcing bars is performed according to the order specified in the table shown in FIG. That is, by predefining a cross section in which a sufficient number of main reinforcements are arranged for the size of the cross section, a design that can be automatically constructed can be performed. Note that the strength of the concrete shall not be changed at this time. In addition, the column length, column width, and placement of reinforcing bars are determined according to the cross section of the girders and the placement of the reinforcing bars. Specifically, the section of the girders and the placement of the reinforcing bars may be determined in association with the cross sections of the girders and the placement of the reinforcing bars shown in FIG. The cross section of the column and the placement of the reinforcing bars may be determined based on a predetermined rule.

In addition, if it is determined that the shear stress degree calculated in S13 does not satisfy the allowable stress degree in S14, the order of application of shear reinforcing bars (hoop bars (tie bars) in columns or A table that stores the number of stirrups (stiff bars) in a beam and the combination of their material types is read from the storage device 12, and the number of shear reinforcing bars is increased or the material type is changed according to the order.

In the case of an steel structure, a table defining the order of enlarging the cross section and material type of the steel frame is stored in advance in the storage device 12, and in S15, the cross section is enlarged based on the table.

Further, in the steel structure and the RC structure, the user may preset the upper limit of the beam thickness as the design data. In this case, if expanding the cross section of the beam according to the above table exceeds the upper limit of the beam width, the size of the beam may be fixed to a value that does not exceed the upper limit, and only the width of the beam may be expanded. .

On the other hand, if it is determined in S14 that the stress level does not exceed the allowable stress level (S14: YES), the cross section calculator 143 unifies the cross section sizes. In this step, for example, girders that are linearly connected via columns and have the same span may be unified in cross-sectional size and arrangement of reinforcing bars. In addition, the size of the cross section and the arrangement of reinforcing bars may be unified for the columns existing at corresponding positions on the upper and lower floors.

This completes the automatic design processing of the main frame based on the primary design.

Further, the cross section calculation unit 143 automatically designs the main frame based on the secondary design (Fig. 2: S5). The details of this step will be described separately for the processing performed in the case of the RC structure and the processing performed in the case of the S structure.

FIG. 9 is a processing flow diagram showing an example of processing for automatically designing the main frame based on the secondary design in the case of an RC structure. Note that load calculation and stress analysis are performed in advance in the same manner as S11 to S12 in FIG.

The cross-section calculator 143 determines whether the maximum story drift angle is equal to or less than a predetermined standard (FIG. 9: S21). The maximum story drift angle is obtained as the largest value among the values obtained by dividing the horizontal displacement of each floor by the floor height during an earthquake. The maximum interstory drift angle can also be determined by existing methods. Also, the predetermined standard adopts a value smaller than the legal standard (for example, 1/200).

If it is determined that the maximum story drift angle exceeds a predetermined standard (S21: NO), the rigidity of the frame is improved. In this step, the section calculation unit 143 expands the beam width of the floor and the upper floor, and the pillars of the floor.

Specifically, a predetermined magnitude is added to each of the beam width and column length to perform the stress analysis (S22), and the process returns to S21. After the automatic design based on the primary design is completed, when the automatic design based on the secondary design is started, the beam width and column are determined so that the inter-story drift angle satisfies a predetermined standard. repetition can be reduced.

On the other hand, if it is determined in S25 that the maximum story drift angle is equal to or less than the predetermined reference (S25: YES), the cross section calculator 143 performs cross section calculation (S23). In this step, the section calculation unit 143 calculates the bending stress degree and the shear stress degree for the columns and girders. Edge stress and shear stress can be calculated by existing methods, for example, using section modulus.

In addition, the section calculation unit 143 calculates the possessed horizontal strength using the structural analysis model (S24). The retained horizontal bearing capacity (Qu) is obtained as the sum of the horizontal shear forces of columns, bearing walls and braces on each floor. An existing technique can be used as a method for calculating the retained horizontal strength.

In addition, the section calculation unit 143 determines whether or not the retained horizontal strength satisfies a predetermined standard on all floors (S25). The predetermined standard can adopt the required horizontal strength or a value based thereon. Further, the required horizontal strength (Qun) of each floor is obtained by the following formula (1), for example.
Qun=Ds×Fes×Qud (1)
Ds is the structural characteristic coefficient of each floor, Fes is the shape characteristic coefficient of each floor, and Qud is the horizontal force generated on each floor due to the seismic force. In step S22, it may be determined whether the required horizontal strength obtained in S21 is larger than the required horizontal strength. It may be determined whether the retained horizontal strength obtained in S21 is greater than the reference.

If it is determined that the horizontal bearing capacity of all floors exceeds the predetermined standard (S25: YES), the automatic design processing of the main frame based on the secondary design is terminated. On the other hand, if it is determined that the retained horizontal strength does not exceed the predetermined standard on any floor (S25: NO), the defective portion is eliminated (S26). In this step, the number of shear reinforcing bars is increased with respect to the brittle fracture member. For example, adding stirrups (stiff ribs) to the brittle fracture member of the beam. Regarding the increase in the number of reinforcing bars, the order in which the numbers and types of reinforcing bars are increased is determined based on a predetermined table. Alternatively, the column hinges may be eliminated and the number of reinforcing bars of the columns may be increased so as to form beam hinges. After that, the process transitions to FIG. 10 via connector A. FIG.

Also, the cross-section calculation unit 143 determines whether or not there is a bearing wall ( FIG. 10 : S27). Note that the load-bearing wall is placed, for example, when it is placed in the design BIM model read in S1 of FIG. 2, or when the user adds braces to the structural analysis model by S27 (both not shown). ing. If there is no load-bearing wall (S27: NO), it is determined whether there is a floor with insufficient load-bearing capacity, and if there is, the beam is reinforced (S28). In this step, for the beams of the floor and the upper floor, the number of reinforcing bars of members that will cause hinges at an early stage is increased, and if the beam width is insufficient, the beam width is expanded by a predetermined amount, returns to the process of S24. Whether or not the beam width is sufficient for the number of reinforcing bars is determined based on the information in the table, for example, by pre-storing the number of reinforcing bars and the required beam width in correspondence with each other in a table.

If it is determined in S27 that there is a load-bearing wall (S27: YES), the section calculation unit 143 identifies a floor with insufficient load-bearing capacity (S29).

In addition, the cross-section calculator 143 determines whether the tower ratio is equal to or less than the threshold (S30). Tower ratio is calculated as the ratio of building height to building width. If the tower ratio is not equal to or less than the threshold (S30: NO), the wall vertical streaks are reduced (S31). In this step, the number of wall reinforcements and the material type are changed according to a predetermined table within a range not exceeding a predetermined minimum value. As for earthquake-resistant walls, the thickness and spacing of vertical and horizontal reinforcing bars for each inner wall or outer wall and for each floor are set in a table of initial values as shown in FIG. 5 and in an order as shown in FIG. is pre-stored in a table indicating

In addition, the cross-section calculation unit 143 reduces the number of main reinforcements in the bearing wall direction. As for the main reinforcements in the bearing wall direction, the number and material type are changed according to a predetermined table so as not to exceed a predetermined minimum value. After that, the process returns to S24 in FIG.

On the other hand, if it is determined in S30 that the tower ratio is equal to or less than the threshold (S30: YES), the wall thickness is increased or the bar arrangement is increased (S32). Also in this step, the wall thickness is increased or the number of reinforcing bars is increased according to a table in which the order of increasing the combination of the wall thickness and the number of reinforcing bars is predetermined. After that, the process returns to S24 in FIG.

Based on the tower ratio, it is possible to select an appropriate design according to the failure mode by reducing the reinforcing bars on the floor with insufficient bearing capacity to reduce the bearing capacity or increasing the reinforcing bars to improve the bearing capacity. That is, a cost-effective design can be realized by choosing between shear failure and bending failure.

As described above, the process is repeated until the retained horizontal strength satisfies the standard on all floors.

FIG. 11 is a processing flow diagram showing an example of the automatic design processing of the main frame based on the secondary design in the case of the steel structure. It is assumed that load calculation, stress analysis, and section calculation are performed in advance in the same manner as S11 to S13 in FIG. The cross section calculation unit 143 calculates the retained horizontal strength using the structural analysis model ( FIG. 11 : S41). Calculation of the retained horizontal strength (Qu) is the same as the processing of S21 in FIG.

In addition, the cross-section calculation unit 143 determines whether or not the retained horizontal strength satisfies a predetermined standard on all floors (S42). The processing of this step is also the same as that of S22 in FIG.

If it is determined that the retained horizontal strength exceeds the predetermined standard on all floors (S42: YES), the automatic design processing of the main frame based on the secondary design is terminated. On the other hand, when it is determined that the retained horizontal strength does not exceed the predetermined standard on any floor (S42: NO), the section calculation unit 143 determines whether or not braces are present on floors that do not satisfy the standard (S43). It should be noted that, for example, when the brace is placed in the design BIM model read in S1 of FIG. 2, or when the user adds the brace to the structural analysis model by S43 of FIG. are placed.

If the brace does not exist (S43: NO), the cross section calculator 143 enlarges the cross section of the beam member (S44). In this step as well, the cross section of the beam is enlarged according to a table that defines the order of increasing the types of steel frames and the sizes of each part.

On the other hand, if it is determined in S43 that a brace exists (S43: YES), the cross-section calculator 143 determines whether the βu value is less than the threshold (S45). The value of βu can be obtained as a ratio of the total horizontal strength of the bearing wall to the retained horizontal strength. If the βu value is not less than the threshold (S45: NO), the cross-section calculator 143 enlarges the cross-section of the brace (S46). In this step, the cross section of the brace is enlarged according to a table that defines the order of increasing the type of steel frame and the size of each part. Then, the process returns to S41.

Further, when the βu value is equal to or greater than the threshold (S45: YES), the cross section calculator 143 enlarges the cross section of the beam member (S47). In this step as well, the cross section of the beam is enlarged according to a table that defines the order of increasing the types of steel frames and the sizes of each part. Further, a second threshold smaller than the threshold (first threshold) used in S45 may be used to repeat the process of enlarging the cross section of the beam until the βu value becomes equal to or less than the second threshold in S45. . Then, the process returns to S41.

As described above, the process is repeated until the retained horizontal strength satisfies the standard on all floors.

In addition, the section calculation unit 143 performs automatic design processing of the foundation ( FIG. 2 : S6). Details of this step will be described with reference to FIG. FIG. 12 shows an example of automatic design processing of a cast-in-place pile formed by a bottom enlarging method (earth drilling method) for enlarging the pile bottom. Further, it is assumed that the ground conditions and the like are set in advance and the concrete strength is constant. Note that the processing shown in FIG. 12 may be performed for each of the short-term allowable shear force and the long-term allowable shear force.

The section calculation unit 143 calculates the shear force borne by the middle pile portion, which is the central portion of the pile (Fig. 12: S51). In this step, the allowable shear force is calculated based on, for example, a predetermined formula.

Also, the cross-section calculation unit 143 determines whether the pile has a predetermined strength (S52). In this step, the cross-section calculator 143 determines whether the allowable shear force is, for example, greater than a predetermined number of times the shear stress. When it is determined that the pile does not have the predetermined strength (S52: NO), the cross-section calculation unit 143 enlarges the shaft diameter of the pile (S53). In this step, the cross-section calculator 143 adds a predetermined value to the shaft diameter. Then, the process returns to S51.

On the other hand, if it is determined in S52 that the pile has a predetermined strength (S52: YES), the cross section calculation unit 143 verifies whether the bar arrangement satisfies a predetermined condition (S54). The predetermined condition can be, for example, that the interval between the reinforcing bars of the main reinforcing bars is equal to or larger than a predetermined size, that the interval between the hoop bars is equal to or smaller than a specified size, and that the amount of the main reinforcing bars is equal to or larger than a specified value. For example, the interval between the main reinforcing bars is obtained by dividing the length of the circumference, which is calculated by subtracting the thickness of the temporary steel pipe from the diameter of the pile, by the number of reinforcing bars.

In addition, the section calculation unit 143 determines whether or not the bar arrangement is sufficient (S55). In this step, the cross-section calculator 143 determines whether or not the predetermined condition shown in S54 is satisfied. When it is determined that the bar arrangement is not sufficient (S55: NO), the cross section calculator 143 increases the shaft diameter of the pile (S56). In this step, the cross-section calculator 143 adds a predetermined value to the shaft diameter. By enlarging the shaft diameter, it is possible to increase the amount of reinforcing bars that can be accommodated in the pile. Then, the process returns to S55.

On the other hand, if it is determined in S55 that the bar arrangement is sufficient (S55: YES), the processing transitions to FIG. FIG. 13 is also a processing flow diagram showing an example of automatic design processing for cast-in-place piles.

The section calculation unit 143 determines the steel pipe thickness of the steel pipe portion of the pile ( FIG. 13 : S57). In this step, the thickness of the steel pipe is determined according to the shaft diameter of the middle pile determined in the process of FIG. 12 .

Next, the cross-section calculation unit 143 increases the pointing force by enlarging the diameter of the expanded bottom portion when the supporting force of the pile is not sufficient. First, the section calculation unit 143 calculates the pile bearing capacity (S58). In this step, the section calculation unit 143 calculates the pile bearing capacity (kN/pile) according to a predetermined calculation formula. In addition, the section calculation unit 143 determines whether the pile bearing capacity is equal to or greater than a predetermined threshold (S59). In this step, the section calculation unit 143 determines whether the pile bearing force calculated in S58 is equal to or greater than the axial force for pile design predetermined as a threshold value. Moreover, when it is determined that the pile bearing capacity is less than the threshold value (S59: NO), the section calculation unit 143 increases the effective bottom expansion diameter (S60). The effective bottom expansion diameter can be obtained, for example, as a value obtained by subtracting a predetermined value from the construction bottom expansion diameter. In this step, the cross-section calculation unit 143 adds a predetermined value to the effective enlarged bottom diameter.

Further, the cross-section calculator 143 determines whether the shaft diameter is sufficient (S62). The range of the effective expanded bottom diameter is stored in advance in the storage device 12 in association with the shaft diameter, and in this step, the cross section calculator 143 determines whether the size of the effective expanded bottom diameter with respect to the shaft diameter falls within the allowable range. .

If it is determined that the shaft diameter is not sufficient, the cross-section calculator 143 increases the shaft diameter (S62). In this step, the cross-section calculator 143 adds a predetermined value to the shaft diameter. Then, the process returns to S61.

On the other hand, if it is determined in S61 that the shaft diameter is sufficient (S61: YES), the automatic foundation design process is terminated.

In addition, the skeleton quantity calculation unit 144 calculates (accumulates) the skeleton quantity ( FIG. 2 : S7). In this step, the frame quantity calculation unit 144 uses the structural analysis model to calculate the total amount of concrete (m ³ ), the total amount of formwork (m ² ), the total amount of reinforcing bars (t), the total amount of steel frames (t), the total amount of Calculate the amount of concrete, formwork, reinforcing bars and steel frames per floor, the amount of reinforcing bars and formwork per unit amount of concrete, and so on. In addition, the skeleton quantity calculation unit 144 may output the calculated skeleton quantity to the user via the input/output I/F 13, or the structural analysis model after the cross section is enlarged may be used by another program. good. Also, the frame quantity calculation unit 144 or another program may calculate the estimated cost using the amount of concrete and the amount of reinforcing bars calculated in S7.

With this, the design support processing according to the present embodiment ends. In addition to automatically designing the building members for structural analysis by the above-described processing, the user may be allowed to change the layout and size of the building members as appropriate.

<effect>
According to the design support device according to the embodiment, in the primary design and the secondary design, by repeating the process of enlarging the cross section so as to satisfy a predetermined standard, the cross section of the structural member can be designed to have an appropriate size. will be able to That is, it is possible to support structural design that satisfies a predetermined standard for the cross section of the building member. In addition, by automatically arranging secondary members such as small beams, studs, and wind-resistant beams based on standard rules, we have created an analysis model that can analyze the order in which hinges occur based on more realistic stress conditions. can be created.

In addition, by automatically enlarging the cross-section of the building member using the analysis model, it is possible to generate a three-dimensional model that satisfies the safety requirements of the building, for example. By doing this especially for the BIM model, the generated 3D model can also be used to output building structure quantities, e.g. can be output without any trouble on the part of the user.

Specifically, in RC structures, a table as shown in FIG. It is possible to increase the cross section of and the reinforcing bars to be arranged in a well-balanced manner. Further, according to S21 and S22 in FIG. 9, by roughly enlarging the cross section based on the maximum story drift angle, it is possible to quickly complete a design that finally satisfies the standards required for the building. can be reduced. Further, according to S30 to S32 of FIG. 10, when bearing walls are provided, appropriate designs with different failure modes can be selected according to the tower ratio. In other words, a cost-effective design can be realized by selecting either shear failure or bending failure.

Further, in the enlargement of the cross section shown in S15 of FIG. 6 and S44 and S47 of FIG. 11, the width of the beam may be enlarged when the beam height exceeds a predetermined maximum value. In this way, it is possible to design a design that satisfies, for example, the user-designated maximum value of beam strength, and also satisfies structural requirements.

<Others>
Note that the embodiment is an example, and the present invention is not limited to the configuration described above. Further, the subject of the present invention includes a computer program for executing the processing described above and a computer-readable recording medium recording the program. The recording medium on which the program is recorded enables the above processing by causing a computer to execute the program.

A computer-readable recording medium is a recording medium that can store information such as data and programs by electrical, magnetic, optical, mechanical, or chemical action and can be read by a computer. Examples of such recording media that can be removed from the computer include flexible disks, magneto-optical disks, optical disks, magnetic tapes, memory cards, and the like. Recording media fixed to computers include HDDs, SSDs (Solid State Drives), ROMs, and the like.

1: Design support device 11: Communication I/F
12: storage device 13: input/output I/F
14: Processor 141: Model generation unit 142: Secondary member design unit 143: Section calculation unit 144: Frame quantity calculation unit 15: Bus

Claims (18)

A structural analysis model for structural calculation in which a three-dimensional model of a building showing the arrangement of building members including structural members is read from a storage device and the cross section of the building members included in the three-dimensional model is set to a temporary size. a model generator that converts to
a section calculation unit that performs structural calculation using the structural analysis model, and calculates the section by repeating enlargement of the section of the structural member included in the structural analysis model until a predetermined standard is satisfied;
with
For the main frame among the structural members, the order of enlarging the cross section and increasing the number of reinforcing bars is predetermined,
When the building is a reinforced concrete structure, the section calculation section calculates the maximum stress generated in the section of the main frame, and when the maximum stress exceeds the allowable stress, the section of the main frame is calculated based on the order. A design support device that increases the number of reinforcing bars as it expands. A structural analysis model for structural calculation in which a three-dimensional model of a building showing the arrangement of building members including structural members is read from a storage device and the cross section of the building members included in the three-dimensional model is set to a temporary size. a model generator that converts to
a section calculation unit that performs structural calculation using the structural analysis model, and calculates the section by repeating enlargement of the section of the structural member included in the structural analysis model until a predetermined standard is satisfied;
with
When the building has a reinforced concrete structure, the cross section calculation unit enlarges the cross section of the structural member in a predetermined order so that the maximum story drift angle satisfies a predetermined condition, and then expands the cross section of the structural member for each floor of the building. A design support device for enlarging the cross-section of the structural member until the retained horizontal strength satisfies a predetermined required retained horizontal strength. A structural analysis model for structural calculation in which a three-dimensional model of a building showing the arrangement of building members including structural members is read from a storage device and the cross section of the building members included in the three-dimensional model is set to a temporary size. a model generator that converts to
a section calculation unit that performs structural calculation using the structural analysis model, and calculates the section by repeating enlargement of the section of the structural member included in the structural analysis model until a predetermined standard is satisfied;
with
When the building is a reinforced concrete structure and has load-bearing walls, the section calculation unit switches between increasing or decreasing the load-bearing strength of the load-bearing walls based on the tower ratio of the building. A structural analysis model for structural calculation in which a three-dimensional model of a building showing the arrangement of building members including structural members is read from a storage device and the cross section of the building members included in the three-dimensional model is set to a temporary size. a model generator that converts to
a section calculation unit that performs structural calculation using the structural analysis model, and calculates the section by repeating enlargement of the section of the structural member included in the structural analysis model until a predetermined standard is satisfied;
with
When the building is a steel frame structure and has braces, the section calculation unit enlarges the brace section or beam section according to the βu value represented by the ratio of the sum of the horizontal strength of the bearing wall to the horizontal strength of the bearing wall. Design support device. A structural analysis model for structural calculation in which a three-dimensional model of a building showing the arrangement of building members including structural members is read from a storage device and the cross section of the building members included in the three-dimensional model is set to a temporary size. a model generator that converts to
a section calculation unit that performs structural calculation using the structural analysis model, and calculates the section by repeating enlargement of the section of the structural member included in the structural analysis model until a predetermined standard is satisfied;
with
Determine the maximum value of the beam,
When the maximum stress generated in the cross section of the beam exceeds the allowable stress level, the cross section calculation unit expands the cross section of the beam in a predetermined order, and when the predetermined maximum value of the beam strength is exceeded, A design support device that expands beam width. The model generator arranges columns and girders in the structural analysis model based on the span and floor height input by the user,
6. The section calculation unit reads out a standard load stored in advance in a storage device in association with the application based on the use of the floor surface input by the user, and uses it for the structural calculation. The design support device according to any one of the items. further comprising a secondary member design unit that arranges secondary members with respect to the structural analysis model based on a predetermined rule;
The design support device according to any one of claims 1 to 6 , wherein the section calculation unit performs the section calculation using a structural analysis model in which secondary members are arranged. 8. The design according to any one of claims 1 to 7 , further comprising a frame quantity calculation unit that calculates the frame quantity used in the building using the structural analysis model after the section calculation unit has expanded the cross section. support equipment. A structural analysis model for structural calculation in which a three-dimensional model of a building showing the arrangement of building members including structural members is read from a storage device and the cross section of the building members included in the three-dimensional model is set to a temporary size. a model generation step that converts to
a cross section calculation step of performing structural calculation using the structural analysis model and performing cross section calculation by repeating enlargement of the cross section of the structural member included in the structural analysis model until a predetermined standard is satisfied;
is executed by the computer and
For the main frame among the structural members, the order of enlarging the cross section and increasing the number of reinforcing bars is predetermined,
When the building is a reinforced concrete structure, in the cross section calculation step, the maximum stress generated in the cross section of the main frame is calculated. A design support method that increases the number of reinforcing bars as it expands. A structural analysis model for structural calculation in which a three-dimensional model of a building showing the arrangement of building members including structural members is read from a storage device and the cross section of the building members included in the three-dimensional model is set to a temporary size. a model generation step that converts to
a cross section calculation step of performing structural calculation using the structural analysis model and performing cross section calculation by repeating enlargement of the cross section of the structural member included in the structural analysis model until a predetermined standard is satisfied;
is executed by the computer and
When the building is a reinforced concrete structure, in the cross-section calculation step, the cross-section of the structural member is enlarged in a predetermined order so that the maximum inter-story drift angle satisfies a predetermined condition, and then each floor of the building A design support method for enlarging the cross-section of the structural member until the retained horizontal strength satisfies a predetermined required retained horizontal strength. A structural analysis model for structural calculation in which a three-dimensional model of a building showing the arrangement of building members including structural members is read from a storage device and the cross section of the building members included in the three-dimensional model is set to a temporary size. a model generation step that converts to
a cross section calculation step of performing structural calculation using the structural analysis model and performing cross section calculation by repeating enlargement of the cross section of the structural member included in the structural analysis model until a predetermined standard is satisfied;
is executed by the computer and
When the building is a reinforced concrete structure and has a load-bearing wall, in the cross-sectional calculation step, the load-bearing force of the load-bearing wall is increased or decreased based on the tower ratio of the building. A structural analysis model for structural calculation in which a three-dimensional model of a building showing the arrangement of building members including structural members is read from a storage device and the cross section of the building members included in the three-dimensional model is set to a temporary size. a model generation step that converts to
a cross section calculation step of performing structural calculation using the structural analysis model and performing cross section calculation by repeating enlargement of the cross section of the structural member included in the structural analysis model until a predetermined standard is satisfied;
is executed by the computer and
When the building is a steel structure and has braces, the brace section or beam section is enlarged according to the βu value represented by the ratio of the sum of the horizontal strength of the bearing wall to the horizontal strength of the bearing wall. Design support method. A structural analysis model for structural calculation in which a three-dimensional model of a building showing the arrangement of building members including structural members is read from a storage device and the cross section of the building members included in the three-dimensional model is set to a temporary size. a model generation step that converts to
a cross section calculation step of performing structural calculation using the structural analysis model and performing cross section calculation by repeating enlargement of the cross section of the structural member included in the structural analysis model until a predetermined standard is satisfied;
is executed by the computer and
Determine the maximum value of the beam,
When the maximum stress generated in the cross section of the beam exceeds the allowable stress level, the cross section of the beam is expanded in a predetermined order, and when the maximum beam strength exceeds the predetermined maximum value, the width of the beam is expanded. Design how to help. A structural analysis model for structural calculation in which a three-dimensional model of a building showing the arrangement of building members including structural members is read from a storage device and the cross section of the building members included in the three-dimensional model is set to a temporary size. a model generation step that converts to
a cross section calculation step of performing structural calculation using the structural analysis model and performing cross section calculation by repeating enlargement of the cross section of the structural member included in the structural analysis model until a predetermined standard is satisfied;
on the computer, and
For the main frame among the structural members, the order of enlarging the cross section and increasing the number of reinforcing bars is predetermined,
When the building is a reinforced concrete structure, in the cross section calculation step, the maximum stress generated in the cross section of the main frame is calculated. A design aid program that increases the number of rebars as it expands. A structural analysis model for structural calculation in which a three-dimensional model of a building showing the arrangement of building members including structural members is read from a storage device and the cross section of the building members included in the three-dimensional model is set to a temporary size. a model generation step that converts to
a cross section calculation step of performing structural calculation using the structural analysis model and performing cross section calculation by repeating enlargement of the cross section of the structural member included in the structural analysis model until a predetermined standard is satisfied;
on the computer, and
When the building is a reinforced concrete structure, in the cross-section calculation step, the cross-section of the structural member is enlarged in a predetermined order so that the maximum inter-story drift angle satisfies a predetermined condition, and then each floor of the building A design support program for enlarging the cross section of the structural member until the retained horizontal strength satisfies a predetermined required retained horizontal strength. A structural analysis model for structural calculation in which a three-dimensional model of a building showing the arrangement of building members including structural members is read from a storage device and the cross section of the building members included in the three-dimensional model is set to a temporary size. a model generation step that converts to
a cross section calculation step of performing structural calculation using the structural analysis model and performing cross section calculation by repeating enlargement of the cross section of the structural member included in the structural analysis model until a predetermined standard is satisfied;
on the computer, and
When the building is a reinforced concrete structure and has a load-bearing wall, the design support program switches whether the load-bearing strength of the load-bearing wall is increased or decreased based on the tower ratio of the building in the cross section calculation step. A structural analysis model for structural calculation in which a three-dimensional model of a building showing the arrangement of building members including structural members is read from a storage device and the cross section of the building members included in the three-dimensional model is set to a temporary size. a model generation step that converts to
a cross section calculation step of performing structural calculation using the structural analysis model and performing cross section calculation by repeating enlargement of the cross section of the structural member included in the structural analysis model until a predetermined standard is satisfied;
on the computer, and
When the building is a steel frame structure and has braces, the brace section or beam section is expanded according to the βu value represented by the ratio of the sum of the horizontal strength of the bearing wall to the horizontal strength of the bearing wall. Design support program. A structural analysis model for structural calculation in which a three-dimensional model of a building showing the arrangement of building members including structural members is read from a storage device and the cross section of the building members included in the three-dimensional model is set to a temporary size. a model generation step that converts to
a cross section calculation step of performing structural calculation using the structural analysis model and performing cross section calculation by repeating enlargement of the cross section of the structural member included in the structural analysis model until a predetermined standard is satisfied;
on the computer, and
Determine the maximum value of the beam,
When the maximum stress generated in the cross section of the beam exceeds the allowable stress level, the cross section of the beam is expanded in a predetermined order, and when the maximum beam strength exceeds the predetermined maximum value, the width of the beam is expanded. Design support program.

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