JP2024076862A - Design user terminal and program - Google Patents

Abstract

[Problem] To provide a design user terminal and program capable of designing a BIM design model that enables rough estimates to be made with high accuracy according to the property.
[Solution] A design user terminal 10 that designs a BIM design model of a building included in a system building, and has a perimeter model creation unit 22 that creates a perimeter model 65 that has exterior columns 61 and exterior beams 62 located on the perimeter, a memory unit 32 that stores placement rules regarding whether a center column 66 is necessary and specifications according to the length and burden width of the main beams 71, a judgment unit 23 that judges whether a center column 66 is necessary and whether the placement position and number of the center columns satisfy the placement rules, a main beam setting unit 25 that sets the main beams 71 to specifications according to their length and burden width, a brace setting unit 24 that sets the number and specifications of braces 68, and a main beam etc. setting unit 26 that sets main beams 72 perpendicular to the main beams 71, rafters 73 that connect the exterior columns 61 and the main beams 72, and horizontal braces 75.
[Selected figure] Figure 2

Description

The present invention relates to a design user terminal and a program.

In architectural design, the layout of the building (architecture) is decided while taking into consideration the site conditions and the surrounding environment, and the design of the interior and exterior, floor plan, decoration, etc. is carried out first. In this design, 2D drawings as well as 3D drawings including perspective drawings are created using the commonly used CAD (Computer-Aided Design). After the design, the structural design is carried out to set the columns and beams that make up the main structure of the building so that it meets safety requirements against snowfall, earthquakes, etc. Furthermore, after this structural design, production design is carried out to create a production model in which each component that will actually be used and produced in the factory is reflected in the model.

Recently, in the design of the above-mentioned buildings, BIM (Building Information Modeling) models are used to share information about buildings among designers and engineers. Here, a BIM model is a three-dimensional model that contains information about the shape in a virtual three-dimensional space of the components that make up a building (also called objects, including beams, columns, walls, etc.), as well as information about the materials, dimensions, placement positions, etc. (collectively referred to as "specification information"). Using this BIM model, it is possible to create three-dimensional drawings of the three-dimensional model viewed from various angles, as well as to cut the three-dimensional drawings in various ways and create two-dimensional drawings such as floor plans (including floor plans) and elevations (including frame drawings) viewed from various angles. In other words, each component that makes up a three-dimensional model contains various specification information, which can be changed, modified, or added to, and a history of changes, additions, etc. can also be kept.

Incidentally, among the buildings to be designed, buildings in which the construction of the framework, roof, exterior walls, etc. is standardized, and the production process of the components is systemized, are generally referred to as "system buildings." For example, factories, logistics warehouses, and retail stores such as drugstores and convenience stores are given as examples of system buildings.

Here, Patent Document 1 proposes an information management system using the above-mentioned BIM. Specifically, it is an information management system having an information processing terminal used by a user and a server device communicably connected to the information processing terminal via a network. This server device is equipped with a storage unit that stores shape information and specification information of an object in association with the object, stores work information that associates the object with a work item related to it, and resource information that associates the work item with a resource item related to it, a control unit that acquires information requested by a user using the information processing terminal based on the shape information, specification information, work information, and resource information, and a communication unit that transmits the acquired information requested by the user to the information processing terminal that is the request source. In addition, the information processing terminal is equipped with a display unit that displays a predetermined screen to the user using the information processing terminal based on the information requested by the user using the information processing terminal received from the server device via the network.

JP 2013-164681 A

According to the information management system described in Patent Document 1, information about buildings can be appropriately managed, and users can easily obtain the information they need. Meanwhile, in designing the BIM design model for the above-mentioned system architecture, a BIM design model is created in which the plan and height dimensions of the building are set, multiple exterior materials of specified dimensions are arranged around the building's perimeter, and a corrugated roof with a specified slope is arranged on the roof. This BIM design model makes it possible to directly imagine the exterior of the building.

Furthermore, the structure and scale of the created BIM design model is compared with past building records of a similar scale, and the weight of the steel frame for the entire building is calculated from the weight of the steel frame per tsubo to make a rough estimate for the building. Rough estimates made at the early design stage when the BIM design model is created are extremely important, as they are used to compare with budgets and serve as materials for presentations to clients.

However, because this is a rough estimate based on the weight of steel frames in light of past performance, its accuracy is not necessarily high. Also, even in systems-built buildings where the fit of each component is standardized, the specifications of structural components such as columns and beams (main and secondary beams), vertical braces, tie beams, and horizontal braces can differ from property to property. Therefore, there is a need for a design user terminal that can design BIM design models that make it possible to perform rough estimates with high accuracy tailored to each property.

The present invention has been made in consideration of the above-mentioned problems, and aims to provide a design user terminal and program that can design a BIM design model that enables highly accurate rough estimates for each property.

In order to achieve the above object, one aspect of the design user terminal according to the present invention comprises:
A design user terminal for designing a BIM design model of a building included in a system building,
a perimeter model creation unit that creates a perimeter model having plan dimensions and height dimensions of the building, and having exterior columns located on the perimeter and exterior beams connecting adjacent exterior columns;
A storage unit that stores at least an arrangement rule regarding the necessity of a center column to be arranged inside the perimeter model and specifications according to the length and width of the girder;
a determination unit that determines whether the center pillar is required to be placed and whether the placement position and the number of the center pillars when placed satisfy the placement rule;
A girder setting unit that sets the girder connecting the outer column and the center column to specifications according to its length and load width;
A brace setting unit that sets the number and specifications of braces to be incorporated into the outer periphery model;
It is characterized by having a minor beam setting section for setting a minor beam perpendicular to the main beam, a roof connecting beam connecting the outer column and the minor beam, and a horizontal brace.

According to this aspect, a perimeter model with exterior columns and beams is created, center columns are set based on placement rules, girders are set with specifications according to their length and load width, the number and specifications of braces are set, and further, minor beams, tie beams, and horizontal braces are set. By calculating the steel frame weight of each of these components, a highly accurate rough estimate can be made.

Here, each member that is set can be called a "provisional member" or "provisional structural member" because it is a member that is provisionally set before structural calculations are performed. Even though they are provisional members (provisional structural members), the specifications of each member, such as the exterior columns, exterior beams, and center columns, can be roughly set based on past performance from the scale of the building, and so the specifications do not deviate significantly from the members (called actual members) that are set when the structural designer creates the BIM structural model. Furthermore, because the steel frame weight of the entire building is calculated based on a provisional member arrangement model (BIM design model) made up of provisional members, the steel frame weight can be calculated with significantly higher accuracy than the conventional method described above, which calculates the steel frame weight of the entire building from the steel frame weight per tsubo in past performance.

In the "placement rules" that are referenced when determining whether or not a center pillar is required, the need for a center pillar is stipulated according to, for example, snow depth, the distance between opposing outer pillars (the distance between the outer pillars parallel to the water gradient or the distance between the outer pillars perpendicular to the water gradient), etc. If the distance between the outer pillars is long and it is determined that a center pillar is required, the center pillar is placed at any position between the outer pillars, and it is determined whether both the distance between the outer pillar and the center pillar in the direction parallel to the water gradient of the roof (e.g., the first distance) and the distance between the outer pillar and the center pillar in the direction perpendicular to the water gradient (e.g., the second distance) are within the distance thresholds stipulated in the placement rules.

In addition, in system buildings, in order to minimize wall thickness, the furring strips that form the exterior wall base are placed within the column surface. To achieve this arrangement, the exterior beams are short beams between the columns, and the furring strips are made of channel steel or the like and are eccentrically placed on the interior side of the column surface. Because the exterior beams are short beams that connect the exterior columns, the structure made up of the exterior columns and exterior beams that form the perimeter model can become unstable. Therefore, by connecting the small beams connected to the main beams and the exterior columns with rafters, it is possible to guarantee the structural stability of the exterior columns and exterior beams in a three-dimensional structure.

The design user terminal in this embodiment includes a personal computer or tablet owned by the design engineer.

In another aspect of the design user terminal according to the present invention,
The brace setting portion includes:
Set the number and specifications of the braces according to the size of the building, or
The number and specifications of the braces are set based on the larger of the horizontal force during an earthquake calculated based on the building weight and design seismic intensity according to the scale of the building, and the horizontal wind force according to the standard wind speed.

According to this aspect, the number and specifications of braces (vertical braces) can be set with high precision by setting the number and specifications according to the size of the building, or by setting the number and specifications based on the larger of the horizontal force during an earthquake calculated from the building weight and design seismic intensity according to the size of the building, and the horizontal force during wind according to the reference wind speed. Here, for example, in a system architecture building that is rectangular in plan view, braces are placed on a pair of outer periphery surfaces parallel to the water gradient, and a pair of outer periphery surfaces perpendicular to the water gradient. The design engineer places the set number of braces on each outer periphery surface in a position that does not interfere with doorway openings, window openings, etc.

In another aspect of the design user terminal according to the present invention,
The roof of the building is a folded plate roof,
The memory unit further stores specifications according to the length of the beam,
The beam setting section is characterized in that beams of a predetermined specification are automatically set at a predetermined pitch based on the specifications of the folded plates that make up the folded plate roof, the pitch of the beams according to the snow load, and the length of the beams.

According to this aspect, the number and specifications of the girders can be set with high precision by automatically setting girders of a specified specification at a specified pitch based on the specifications of the folded plates that make up the folded plate roof and the pitch and length of the girders according to the snow load.

In another aspect of the design user terminal according to the present invention,
A foundation setting unit that sets foundations below the outer columns and, if there is a center column, below the center column;
The present invention is characterized in that it further comprises a ceiling hanging material setting section that sets the ceiling hanging materials to be placed under the small beams at a predetermined pitch.

According to this method, by setting foundations under the outer and center columns, and setting ceiling members under the small beams at a specified pitch, the main steel frame components that make up the system architecture building, including the outer and center columns, outer beams, main beams, small beams, and folded-plate roof, as well as the foundations and ceiling members, are set, making it possible to perform a rough estimate with even higher accuracy.

Moreover, one aspect of the program according to the present invention is
A program for causing a computer that designs a BIM design model of a building included in a system building to execute the following processes:
A perimeter model is created that has plan dimensions and height dimensions of the building, and has exterior columns located on the perimeter and exterior beams connecting adjacent exterior columns;
At least a placement rule regarding the necessity of a center column to be placed inside the perimeter model and specifications according to the length and width of the girder are stored;
determining whether the center pillar needs to be placed and whether the placement position and the number of the center pillars when placed satisfy the placement rule;
The girder connecting the outer column and the center column is set to specifications according to its length and load width,
Set the number and specifications of braces to be incorporated into the perimeter model;
The system is characterized by having a minor beam perpendicular to the main beam, a tie beam connecting the exterior column and the minor beam, and a horizontal brace.

According to this aspect, a program installed or downloaded to a personal computer or the like is used to create an outer perimeter model with exterior columns and exterior beams, set center columns based on placement rules, set main girders with specifications according to their length and load width, set the number and specifications of braces, and further set minor beams, tie beams, and horizontal braces. By calculating the steel frame weight of each of these components, a highly accurate rough estimate can be made.

As can be seen from the above explanation, the design user terminal and program of the present invention can provide highly accurate rough estimates for each property.

FIG. 2 is a diagram illustrating an example of a hardware configuration of a design user terminal according to the embodiment. FIG. 2 is a diagram illustrating an example of a functional configuration of a design user terminal according to the embodiment. FIG. 13 is a diagram showing a display example on a display screen of a design user terminal. FIG. 13 is a diagram showing a display example on a display screen of a design user terminal. FIG. 13 is a diagram showing a display example on a display screen of a design user terminal. FIG. 13 is a diagram showing a display example on a display screen of a design user terminal. FIG. 13 is a diagram showing a display example on a display screen of a design user terminal. FIG. 13 is a diagram showing a display example on a display screen of a design user terminal. FIG. 13 is a diagram showing a display example on a display screen of a design user terminal. FIG. 13 is a diagram showing a display example on a display screen of a design user terminal. FIG. 13 is a diagram showing a display example on a display screen of a design user terminal. FIG. 13 is a diagram showing a display example on a display screen of a design user terminal. FIG. 13 is a diagram showing a display example on a display screen of a design user terminal. FIG. 13 is a diagram showing a display example on a display screen of a design user terminal. FIG. 13 is a diagram showing a display example on a display screen of a design user terminal. FIG. 13 is a diagram showing a display example on a display screen of a design user terminal. FIG. 13 is a diagram showing a display example on a display screen of a design user terminal.

Below, an example of a design user terminal according to an embodiment will be described with reference to the attached drawings. Note that in this specification and the drawings, substantially identical components may be designated by the same reference numerals to avoid redundant description.

[Design User Terminal According to the Embodiment]
An example of a design user terminal according to an embodiment will be described with reference to Fig. 1 to Fig. 17. Here, Fig. 1 is a diagram showing an example of a hardware configuration of a design user terminal according to an embodiment, Fig. 2 is a diagram showing an example of a functional configuration of the design user terminal, and Figs. 3 to 17 are diagrams showing examples of displays on a display screen of the design user terminal.

The design user terminal 10 is a user terminal used by the design engineer, and is a user terminal used by the design engineer to design and create a BIM design model, particularly for a building included in a system building.

Although not shown in the figure, other design user terminals include design user terminals used by structural designers, and design user terminals used by production designers who create BIM production models in which each component produced in a factory is reflected in the model. In addition, there are various other user terminals, such as cost estimation user terminals, construction planning user terminals, and actual construction user terminals (none of which are shown in the figure).

A design support system may be constructed in which such various design user terminals (user terminals) are connected to a shared server via a network, and BIM models (BIM design model, BIM structural model, BIM production model, etc.) created on each design user terminal are transmitted to and stored in the shared server each time, and user terminals that have been granted access rights can access the shared server. This design support system includes a form having a closed network in which information is shared only within a company such as a single house manufacturer, as well as a form having an open network that allows information sharing with external organizations (such as material and equipment suppliers owned by material and equipment suppliers who work together at the production design, facility design, construction planning, etc. stages). In addition to storing data, the shared server may also be a cloud server that allows multiple users to share various application software.

The design user terminal 10 according to the embodiment is a user terminal used by a design engineer as a design user terminal during the planning stage of a building included in a system building, and is used to design and create a BIM design model. During the planning stage, by viewing image data (BIM design model) of a three-dimensionally modeled building, the exterior and layout design of the building can be directly imagined.

Here, buildings included in system architecture include logistics warehouses, retail stores such as drugstores and convenience stores, etc.

As shown in FIG. 1, the design user terminal 10 is an information processing device such as a personal computer (PC), a workstation (WS), or a tablet, all of which are composed of a computer.

The computer constituting the design user terminal 10 includes a CPU (Central Processing Unit) 11, a main memory device 12, an auxiliary memory device 13, a communication IF (interface) 14, and an input/output IF 15, which are interconnected by a connection bus 16. The main memory device 12 and the auxiliary memory device 13 are computer-readable recording media. Note that each of the above components may be provided separately, or some of the components may not be provided.

The CPU 11 is also called an MPU (Microprocessor) or a processor, and may be a single processor or a multiprocessor. The CPU 11 is a central processing unit that performs overall control of the design user terminal 10, which is a computer. The CPU 11 provides functions that meet a specified purpose, for example, by expanding a program stored in the auxiliary storage device 13 into an executable form in the working area of the main storage device 12, and controlling peripheral devices through the execution of the program.

The main memory device 12 stores computer programs executed by the CPU 11 and data processed by the CPU 11. The main memory device 12 includes, for example, a flash memory, a RAM (Random Access Memory), and a ROM (Read Only Memory). The auxiliary memory device 13 stores various programs and various data on a recording medium in a readable and writable manner, and is also called an external memory device. The auxiliary memory device 13 stores, for example, an OS (Operating System), various programs, various tables, and the like. The OS includes, for example, a communication interface program that transfers data with external devices connected via the communication IF 14. The external devices include, for example, information processing devices such as personal computers (PCs), workstations (WSs), servers, and mobile terminals connected to a network, as well as external memory devices.

The auxiliary storage device 13 is used, for example, as a storage area that supports the main storage device 12, and stores computer programs executed by the CPU 11, data processed by the CPU 11, etc. The auxiliary storage device 13 is a silicon disk including a non-volatile semiconductor memory (flash memory, EPROM (Erasable Programmable ROM)), a hard disk drive (HDD: Hard Disk Drive) device, a solid state drive device, etc. Examples of the auxiliary storage device 13 include drives for removable recording media such as CD drives, DVD drives, and BD drives. Examples of removable recording media include CDs, DVDs, BDs, USB (Universal Serial Bus) memories, and SD (Secure Digital) memory cards, etc.

The communication IF 14 is an interface with the network to which the design user terminal 10 and the like are connected. The communication IF 14 is connected to a shared server via the network, and downloads various application software used in designing the design, and receives as reference BIM design models created by other design engineers and stored on the shared server.

The input/output IF 15 is an interface that inputs and outputs data between devices connected to the design user terminal 10. Input devices such as a keyboard, a touch panel, a mouse, or other pointing device, and a microphone are connected to the input/output IF 15. The design user terminal 10 accepts operation instructions, etc. from an operator who operates the input device via the input/output IF 15.

The input/output IF 15 is also connected to display devices such as a liquid crystal display (LCD) panel or an organic electroluminescence (EL) panel, and output devices such as a printer and a speaker. The design user terminal 10 outputs data and information processed by the CPU 11 and data and information stored in the main memory device 12 and the auxiliary memory device 13 via the input/output IF 15.

As shown in FIG. 2, the design user terminal 10 provides various functions, such as at least an acquisition unit 21, a perimeter model creation unit 22, a judgment unit 23, a brace setting unit 24, a girder setting unit 25, a beam setting unit 26, a foundation setting unit 27, a ceiling material setting unit 28, a drawing unit 29, a display unit 31, and a memory unit 32, by executing a program by a CPU 11. Note that at least a part of the above processing functions may be provided by a DSP (Digital Signal Processor), a GPU (Graphics Processing Unit), etc., and similarly, at least a part of the above processing functions may be a dedicated LSI (large scale integration) such as an FPGA (Field-Programmable Gate Array), a numerical calculation processor, an image processing processor, or other digital circuit, etc.

The acquisition unit 21 acquires input data from the design engineer and stores (stores) it in the memory unit 32, and also receives application software stored in the shared server and reference BIM design models created by other design engineers. Furthermore, the acquisition unit 21 transmits the BIM design models created by the design engineers to the shared server.

Figure 3 shows an exterior design model 50 that is created in the initial stage of the BIM design model. Autodesk Revit (registered trademark) (manufactured by Autodesk) is installed or downloaded into the storage unit 32 as BIM software, and is launched during design work.

The memory unit 32 further stores structure and use data relating to multiple types of structures and uses, including the building's structural framework and use, exterior material data relating to one or more exterior materials specific to each structure and use, and folded plate data relating to, for example, one type of folded plate that forms a folded plate roof.

The design engineer selects one of the product types set for each structure and use. Here, product types include structures such as steel-framed structural frame types, such as one-story or two-story buildings, structures using single beams, and structures using truss beams. Uses also include logistics warehouses and retail stores. "Products" include products developed and commercialized by Daiwa House Industry Co., Ltd., such as "Frest," "Comfort," "Lead," and "Lead Free."

The designer selects from among the products a product suitable for the structure and use of the system architecture building to be designed, and then selects the exterior material from among the exterior materials specific to the product (standard exterior material manufacturers, product numbers, etc.). In addition, the designer selects whether or not to include a waist wall below the exterior material. After selecting the product, exterior material, and whether or not to include a waist wall in this way, the designer sets the building information, including the plan dimensions and height dimensions of the building. For example, as shown in FIG. 3, a BIM design model 50 in the early stages of design for a retail store or the like is drawn by the drawing unit 29 and displayed on a display screen such as a liquid crystal display of the display unit 31.

The BIM design model 50 shown on the right side of Figure 3 has an exterior wall 52 formed of multiple exterior materials 51 along the X and Y directions of a roughly rectangular shape in plan view, a waist wall 53 below the exterior materials 51, and a folded-plate roof 55 with a specified water gradient and eaves 56 on the three sides other than the one below water.

As shown on the left side of Figure 3, the BIM design model 50 is rectangular in plan view and has multiple grid lines that are mutually perpendicular in the X and Y directions, and exterior columns, described below, are arranged at the grid points 54 between each grid line and the exterior wall 52. Inside the exterior wall 52, multiple grid points 54 formed by each grid line serve as installation positions for center columns, and the design engineer places a center column at any of the grid points 54 as necessary.

As shown in FIG. 4, the display unit 31 displays on the display screen a number of add-in tools used to create a BIM design model. When creating a provisional component placement model, the user presses the add-in tool called "Provisional structural components for rough estimate 41," selects from a number of selection menus in sequence, and makes the required selections and inputs on each selection screen to create the provisional component placement model.

As shown in Figure 4, this selection menu allows you to set the exterior columns ("perimeter columns" in the selection menu) and exterior beams ("eaves beams" and "gable beams" in the selection menu), position the center columns, evaluate the span and load width, position the braces, position the beams (automatic), create the gable eaves purlins, calculate approximate quantities, etc.

First, by selecting the selection menu for the perimeter columns and the eaves and gable girders, the perimeter model creation unit 22 is started, and the exterior columns are set for the grid points 54 between the exterior wall 52 and each grid center shown in the left diagram of Figure 3. Figure 5 shows a perspective view on the display screen 31 of an exterior column 61 of a specified height set at each grid point 54.

The tops of adjacent outer columns 61 that are spaced apart are connected by short outer beams 62. In other words, the outer beams 62 are installed within the thickness of the outer columns 61, and are not arranged on the outside of the outer columns 61 (either on the indoor or outdoor side).

A perimeter model 65 is created from multiple exterior columns 61 and exterior beams 62 that connect the upper parts of each exterior column 61. In the illustrated example, the exterior model 65 has an eave formed by an eave truss 63 added to one side of the rectangle in plan view.

In addition, by creating the outer perimeter model 65, the foundation setting unit 27 shown in FIG. 2 is started, and the outer column under-foundation 57 is automatically created under the outer column 61. In a system architecture building, for example, the outer columns 61 are arranged with a span of about 2 m, so from the standpoint of economy and ease of construction, the outer column under-foundation corresponding to each outer column 61 is formed as a continuous strip footing rather than an independent footing.

After the outer perimeter model 65 is created, center pillar placement is selected in the add-in tool 41 shown in FIG. 4, which starts the determination unit 23 shown in FIG. 2. The determination unit 23 determines whether center pillars are required and whether the placement positions and number of center pillars when placed satisfy the placement rules.

Figure 6 shows a display screen that explains the "placement rules." The need to install a center pillar is influenced by snow depth (snow load), which is one of the design conditions for a system architecture building. The placement rule shown in the figure is a placement rule used in the design of a system architecture building to be constructed in an area where the snow depth is 30 cm.

In Figure 6, "○" indicates that the placement rule is satisfied, and "×" indicates that the placement rule is not satisfied and therefore a center column must be placed to shorten the column spacing. This placement rule sets the column spacing for each column spacing in the direction parallel to and perpendicular to the water gradient so that the main and secondary beams do not deform excessively and the allowable stress is satisfied.

The data regarding this placement rule is stored in the memory unit 32. When the judgment unit 23 judges whether or not a center pillar is necessary, it refers to the placement rule stored in the memory unit 32 each time and makes the judgment.

For example, in the layout rules shown in the upper table of Figure 6, if the column spacing in the direction parallel to the water gradient is 14 m or less and the column spacing in the direction perpendicular to the water gradient is 6 m or less with respect to the overall plan dimensions of the building, then center columns 66 (see the bottom of Figure 6) are not required.

On the other hand, for example, if the column spacing in the direction parallel to the water gradient is 14 m or less and the column spacing in the direction perpendicular to the water gradient is 8 m or more with respect to the overall plan dimensions of the building, the placement of center columns will be necessary.

Figures 7 and 8 are diagrams explaining the placement flow of center columns to satisfy the placement rules. In each diagram, the span length between the upper, lower, left, and right grid centers (span length between outer columns) is 2m.

In FIG. 7, first, on the display screen 31, an arbitrary one of the multiple grid points 54 inside the rectangular exterior wall 52 in plan view is set to the center pillar setting position 54A.

By setting this center pillar setting position 54A, the length of the center pillar 66 placed here to the left and right exterior walls 52 and the length to the top and bottom exterior walls 52 are calculated, and each length (left 8m, right 17m, top 10m, bottom 10m) is displayed as shown in the left diagram of Figure 7.

Of these, the upper right region of the center pillar 66 has a length of 10 m in the direction of the water gradient and a length of 17 m in the direction perpendicular to the water gradient. When referring to the placement rules shown in FIG. 6, the length of 17 m in the direction perpendicular to the water gradient falls outside the range specified by the placement rules, so the placement rules are not satisfied and the result is determined to be "X." The same is true for the lower right region of the center pillar 66.

On the other hand, the upper left and lower left areas of the center pillar 66 both have a length of 10 m in the direction of the water gradient and a length of 8 m in the direction perpendicular to the water gradient. Therefore, when referring to the placement rules shown in Figure 6, the placement rules are met and the result is "○".

Based on this judgment result, the design engineer next sets a separate center column setting position 54B to the right side of center column setting position 54A, as shown in Figure 8. By setting a separate center column 66 at center column setting position 54B in this way, the length to the right of center column setting position 54A is not the length to the exterior wall 52, but the length to center column setting position 54B, which becomes 10 m instead of 17 m as shown in Figure 7. Therefore, referring to the placement rules shown in Figure 6, the center column 66 placed at center column setting position 54B satisfies the placement rules in any direction, up, down, left, or right.

The center pillar judgment result shown in the left diagram of Figure 8 is the judgment result for the center pillar 66 placed at the center pillar setting position 54B, but this center pillar 66 also satisfies the placement rules in all four directions (up, down, left, right), so the judgment results in the four directions are judged to be "○".

In other words, by placing center posts 66 at the two grid points 54A and 54B shown in FIG. 8, the arrangement of center posts 66 satisfies the arrangement rules.

In FIG. 9, a model diagram is displayed on the display screen 31 in which a center column 66 that satisfies the placement rules is placed inside the outer perimeter model 65. Next, by selecting the span and burden width evaluation in the add-in tool 41 shown in FIG. 4, the maximum span of the minor beam: 10 m, the maximum span of the main beam: 10 m, and the maximum burden width of the main beam: 9 m are automatically calculated, as shown in FIG. 10. That is, in FIG. 9, the main beam is placed in the Y direction, which is the direction of the water gradient, and the minor beam is placed in a direction perpendicular to the main beam, so that the placement positions of the two center columns 66 are set, and the maximum span of each of the main beam and minor beam is automatically calculated.

Next, by selecting the brace placement in the add-in tool 41 shown in FIG. 4, the brace setting unit 24 shown in FIG. 2 is started, and the number of braces (vertical braces) to be spanned between the outer columns 61 in the X and Y directions is calculated.

The brace setting unit 24 sets the number and specifications of braces according to the size of the building. In addition, the number and specifications of braces are set based on the larger of the horizontal forces during an earthquake calculated from the building weight and design seismic intensity according to the size of the building, and the horizontal wind force according to the standard wind speed.

When the building shape shown in Figure 3 is set, all items in the plan dimension input section 47 shown in Figure 11 are automatically input, except for "Maximum span of minor beam," "Maximum span of main beam," and "Maximum width of main beam."

When the design engineer inputs information about items other than those automatically input in the design condition input section 46 and plan dimension input section 47, the brace setting section 24 sets the number of braces to be spanned between the outer columns 61 in the X and Y directions based on the larger of the horizontal forces during earthquakes and the horizontal forces during wind, as shown in the brace number calculation result display section 48.

Next, the center column 66 is placed as described above, and the span and burden width evaluation is performed, so that the "maximum span of the minor beam," "maximum span of the main beam," and "maximum burden width of the main beam" are automatically input in the plan dimension input section 47.

As shown in FIG. 12, the design engineer sets the calculated number of braces in brace placement positions 49 on the exterior walls 52 in the X and Y directions. Here, since eight braces are required to be installed in each direction, the brace placement positions 49 are set so that four equal braces are placed on the two sides along each direction.

In this setting, it is necessary to select a position that avoids doorway openings, window openings, etc., so the brace placement position 49 is set by direct input by the design engineer.

In FIG. 13, a model diagram of a state in which a brace 68 is installed at each brace placement position 49 in the X and Y directions is displayed on the display screen 31. In the illustrated example, a cross beam 67 is provided at the midpoint in the height direction between two outer columns 61, and cross-shaped braces 68 are arranged above and below the cross beam 67, thereby forming a brace at one brace placement position 49 shown in FIG. 12.

Next, by selecting the beam arrangement in the add-in tool 41 shown in FIG. 4, the girder setting unit 25 shown in FIG. 2 is activated, and the girder connecting the outer column 61 and the center column 66 is set to specifications according to its length and load width.

Here, the girder has specifications according to its length, and girder specification information data regarding applicable specifications is stored in the memory unit 32, and the girder with the specifications according to the length may be automatically selected, or the design engineer may select it from the memory unit 32.

In FIG. 14, a model diagram is displayed on the display screen 31 showing two center columns 66 and two girders 71 that connect the outer columns 61 on the above-water side and below-water side of the water gradient. The foundation setting unit 27 is then activated, and as shown in FIG. 14, a center-column under-foundation 58, which is an independent foundation, is modeled below the center columns 66.

Next, following the main beam setting unit 25, the secondary beam setting unit 26 shown in FIG. 2 is started, and the secondary beams connecting the main beam 71 and the outer column 61, the rafters connecting the secondary beams and the outer column 61, the secondary beams and the rafters, the outer beams 62, etc. are set to horizontal braces arranged within the planar lattice formed by the secondary beams and the rafters, the outer beams 62, etc.

The beam setting unit 26 automatically sets beams of a specified specification at a specified pitch based on the specifications of the folded plates that make up the folded plate roof, the pitch of the beams according to the snow load, and the length of the beams.

In FIG. 15, a model diagram is displayed on the display screen 31 showing a state in which multiple small beams 72 are installed to connect each main beam 71 and the outer column 61. The multiple small beams 72 are automatically arranged at a predetermined pitch and have a predetermined length.

Furthermore, in FIG. 16, a model diagram showing multiple rafters 73 and multiple horizontal braces 75 installed on the display screen 31 is displayed.

Next, the joist setting unit 26 is followed by the ceiling hanging material setting unit 28 shown in FIG. 2, which automatically sets the ceiling hanging material to be placed under the joists 72 at a predetermined pitch.

In FIG. 17, a temporary component arrangement model 80 formed by installing multiple ceiling hanging members 77 is displayed on the display screen 31. On the display screen 31, the temporary component arrangement model 80, which is a BIM design model, can be displayed from various angles and can be viewed from various angles.

After the temporary component placement model 80 is created, the estimated quantity, which is the total steel weight of each temporary component, is calculated based on the created temporary component placement model 80 by selecting the approximate quantity calculation in the add-in tool 41 shown in Figure 4. Based on this calculation result, an approximate estimate for the system-built building that is the subject of the calculation is calculated.

The design user terminal 10 creates an outer perimeter model 65 with outer columns 61 and outer beams 62, sets center columns 66 based on placement rules, sets main beams 71 with specifications according to their length and load width, sets the number and specifications of braces 68, and further sets small beams 72, tie beams 73, and horizontal braces 75. By doing so, the steel frame weight of each of these components can be calculated, making it possible to efficiently perform a highly accurate rough estimate.

Note that the configurations described in the above embodiments may be combined with other components, and the present invention is not limited to the configurations shown here. In this regard, changes can be made without departing from the spirit of the present invention, and can be determined appropriately according to the application form.

10: Design user terminal 21: Acquisition unit 22: Periphery model creation unit 23: Judgment unit 24: Brace setting unit 25: Girder setting unit 26: Sub-beam setting unit 27: Foundation setting unit 28: Ceiling hanging material setting unit 29: Drawing unit 31: Display unit (display screen)
32: Storage unit 41: Temporary structural member add-in tool (add-in tool)
42: Placement rule screen 43: Placement rule fulfillment screen 46: Design condition input section 47: Plan dimension input section 48: Brace number calculation result display section 49: Brace placement position 50: Exterior design model (BIM design model)
51: Exterior material (exterior wall panel)
52: Outer wall 53: Waist wall 54: Grid point 54A, 54B: Center column setting position (Grid point)
55: Folded roof 56: Eaves 57: Exterior column foundation (strip foundation)
58: Center column foundation (independent foundation)
61: Outer column 62: Outer beam 63: Eaves truss 65: Periphery model 66: Center column 67: Horizontal beam 68: Brace (vertical brace)
71: Main beam 72: Small beam 73: Roof tie beam 75: Horizontal brace 77: Ceiling hanging material 80: BIM design model (temporary component arrangement model)

Claims (5)

A design user terminal for designing a BIM design model of a building included in a system building,
a perimeter model creation unit that creates a perimeter model having plan dimensions and height dimensions of the building, and having exterior columns located on the perimeter and exterior beams connecting adjacent exterior columns;
A storage unit that stores at least an arrangement rule regarding the necessity of a center column to be arranged inside the perimeter model and specifications according to the length and width of the girder;
a determination unit that determines whether the center pillar is required to be placed and whether the placement position and the number of the center pillars when placed satisfy the placement rule;
A girder setting unit that sets the girder connecting the outer column and the center column to specifications according to its length and load width;
A brace setting unit that sets the number and specifications of braces to be incorporated into the outer periphery model;
A design user terminal comprising a sub-beam setting unit for setting a sub-beam perpendicular to the main girder, a rafter connecting the exterior column and the sub-beam, and a horizontal brace. The brace setting portion includes:
Set the number and specifications of the braces according to the size of the building, or
2. The design user terminal according to claim 1, wherein the number and specifications of the braces are set based on the larger of the horizontal force during an earthquake calculated from the building weight and design seismic intensity according to the scale of the building, and the horizontal wind force according to a reference wind speed. The roof of the building is a folded plate roof,
The memory unit further stores specifications according to the length of the beam,
The design user terminal according to claim 2, characterized in that in the joist setting unit, joists of a predetermined specification are automatically set at a predetermined pitch based on the specifications of the folded plates constituting the folded plate roof, the pitch of the joists according to the snow load, and the length of the joists. A foundation setting unit that sets foundations below the outer columns and, if there is a center column, below the center column;
4. The design user terminal according to claim 3, further comprising a ceiling-hanging-material setting unit that sets ceiling-hanging materials to be placed under the small beams at a predetermined pitch. A program for causing a computer that designs a BIM design model of a building included in a system building to execute the following processes:
A perimeter model is created that has plan dimensions and height dimensions of the building, and has exterior columns located on the perimeter and exterior beams connecting adjacent exterior columns;
At least a placement rule regarding the necessity of a center column to be placed inside the perimeter model and specifications according to the length and width of the girder are stored;
determining whether the center pillar needs to be placed and whether the placement position and the number of the center pillars when placed satisfy the placement rule;
The girder connecting the outer column and the center column is set to specifications according to its length and load width,
Set the number and specifications of braces to be incorporated into the perimeter model;
A program for setting a minor beam perpendicular to the main beam, a tie beam connecting the exterior column and the minor beam, and a horizontal brace.

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