Construction support method, construction support program, and construction support device

Abstract

To provide a construction support method that enables seamless and cost-effective work from the design of reinforcing bars to construction.SOLUTION: A construction support method includes: a three-dimensional model information creation step of creating three-dimensional model information relating to three-dimensional models by using center dimension information in millimeters and external dimension information in centimeters of bent reinforcing bars as parameters relating to the three-dimensional models of the bent reinforcing bars; and a reinforcing bar production information creation step of creating reinforcing bar production information based on the three-dimensional model information. The three-dimensional model information creation step at least creates the three-dimensional model information including the center dimension information.SELECTED DRAWING: Figure 7

Description

【Technical Field】 【0001】 The present invention relates to, for example, a construction support method, a construction support program, and a construction support device for supporting the construction of reinforcing bars. 【Background Art】 【0002】 In recent years, for example, when constructing buildings such as buildings and complex facilities, it has been proposed to use BIM (Building Information Modeling). In BIM, parts are combined in a virtual space, and various information such as the weight of reinforcing bars and the completion time is incorporated into the modeled building. 【0003】 For example, Patent Document 1 discloses creating a construction drawing in which a three-dimensional interference check of the reinforcing bars to be arranged is performed in advance by creating a three-dimensional reinforcement model from a two-dimensional CAD drawing. 【Prior Art Documents】 【Patent Documents】 【0004】 【Patent Document 1】 Japanese Unexamined Patent Application Publication No. 2011-253484 【Summary of the Invention】 【Problems to be Solved by the Invention】 【0005】 By the way, in a building made of reinforced concrete, a large number of reinforcing bars of various shapes are used. In addition, many businesses such as design companies (including architectural design offices), construction sites, and reinforcing bar processors are involved in the process from the design to the processing of the reinforcing bars. 【0006】 For example, reinforcement drawings and schedules created by the design company are delivered to the construction site, where the work of creating processing sheets is carried out from the reinforcement drawings and schedules. Furthermore, the processing sheets are delivered from the construction site to the rebar processing company, where the processing sheets are converted into 2D codes (also known as "QR codes (registered trademark)"). The rebar processing company reads the 2D codes into the rebar processing machine, and the rebar is processed based on the information in the 2D codes. Finally, the processed rebars are delivered from the rebar processing company to the construction site in the specified quantities. 【0007】 In each stage of the rebar supply process, information regarding the dimensions of the rebar and units of measurement (information related to numerical representation) is converted to ensure smooth operation in each stage. This conversion is done manually, resulting in information fragmentation between stages. 【0008】 Manual data conversion is performed, for example, to change the numerical representation in 3D data to a numerical representation that is familiar to workers at construction sites or rebar processing companies. Traditionally, this data conversion process has been time-consuming and costly, and has been prone to human error and inaccuracies in various estimation figures such as weight and price. 【0009】 The present invention aims to provide a construction support method, a construction support program, and a construction support device that enable seamless and low-cost execution of reinforcing steel design and construction. [Means for solving the problem] 【0010】 The features of the construction support method according to the present invention are: 3D modeling of bent reinforcing bars A method for supporting the construction of a building using, As parameters for the 3D model of the bent reinforcing bar, the center dimension information of the bent reinforcing bar in millimeters and the outer dimension information in units larger than millimeters are used. A 3D model information creation process for creating 3D model information related to the aforementioned 3D model, A process for creating rebar fabrication information, which creates rebar fabrication information based on the aforementioned 3D model information, A process for creating a summary table that includes the aforementioned 3D model information, Equipped with, At least in the process of creating the 3D model information, the 3D model information is created including the center dimension information. death, In the aforementioned summary table creation process, the summary table showing the external dimension information is created by rounding up the length of the bent reinforcing bar indicated by the external dimension information to the nearest millimeter of the length of the bent reinforcing bar indicated by the center dimension information. That is the case. [Effects of the Invention] 【0011】 According to the present invention, it is possible to provide a construction support method, a construction support program, and a construction support device that enable the seamless and low-cost supply of reinforcing bars. [Brief explanation of the drawing] 【0012】 [Figure 1] This is an explanatory diagram showing the flow of information in a construction support system. [Figure 2] This is an explanatory diagram showing an example of a 3D model, reinforcement drawings, and a summary table. [Figure 3] (a) and (b) are explanatory diagrams showing examples of reinforcement bar arrangement diagrams. [Figure 4] This is a block diagram that schematically shows the configuration of the construction support device. [Figure 5] This is a diagram showing an example of a reinforcing bar object. [Figure 6] This is an explanatory diagram showing an example of parameter input and an example of a numerical table corresponding to the input parameters. [Figure 7] (a) is an explanatory diagram showing the center dimensions of a U-shaped reinforcing bar, and (b) is an explanatory diagram showing the outer and inner dimensions of the reinforcing bar in (a). [Figure 8] (a) is an explanatory diagram showing the center dimensions of a bent section in an enlarged view, and (b) is an explanatory diagram showing the centerlines of a U-shaped reinforcing bar with symbols assigned to each part. [Figure 9](a) is a chart showing an example of a summary table representing the lengths of respective parts in a U-shaped steel bar by outer dimensions, and (b) is a chart showing an example of a summary table representing the lengths of respective parts in the same U-shaped steel bar by center dimensions. [Figure 10] It is an explanatory diagram showing a U-shaped steel bar with the bent part changed to a right-angled shape. [Figure 11] (a) is an explanatory diagram schematically showing the classification of a three-dimensional model of a bent steel bar, (b) is an explanatory diagram schematically showing the first bent steel bar information, and (c) is an explanatory diagram schematically showing the first bent steel bar information and the second bent steel bar information. 【Embodiments for Carrying Out the Invention】 【0013】 Hereinafter, preferred embodiments of the present invention will be described in detail while referring to the drawings. In this embodiment and the drawings related to this embodiment, components with the same reference numerals shall have the same structure or function. 【0014】 <Basic Configuration of Construction Support System 10> FIG. 1 schematically shows the configuration of a construction support system 10 according to an embodiment of the present invention. The construction support system 10 includes a data supply unit 12, a construction unit 14, and a processing unit 16. Examples of the data supply unit 12 include information system companies and architectural design offices. 【0015】 Examples of the construction unit 14 include a construction site where construction of a building (hereinafter referred to as "target building", etc.) to be constructed is carried out. Examples of the processing unit 16 include a steel bar processing company that receives an order from the construction unit 14, performs bending processing of steel bars, and delivers the produced steel bars to the construction unit 14. 【0016】 The data supply unit 12 utilizes a BIM (Building Information Modeling) software program (construction support program, hereinafter referred to as the "BIM program") to create reinforcement drawings, schedules, and fabrication reports from the BIM model, as shown in Figure 1. The data supply unit 12 also creates two-dimensional codes (also known as "QR Code®"). The specific information (data) handled by the data supply unit 12 will be described later. 【0017】 Figure 2 shows an example of various types of information created by the data supply unit 12. Figure 2 shows a 3D model (BIM model) 22 related to the reinforcement of a building, a reinforcement drawing 24 created from the 3D model, and a summary table 26 created based on the reinforcement drawing 24. The 3D model 22, reinforcement drawing 24, and summary table 26 shown in Figure 2 are merely examples. The data supply unit 12 can create various other types of 3D models 22, reinforcement drawings 24, and summary tables 26 besides those shown. 【0018】 Figures 3(a) and 3(b) show an example of a reinforcement bar detail drawing (beam-column connection structure) created based on this information. The structure shown in the 3D model 22 in Figure 2 and the reinforcement bar detail drawings in Figures 3(a) and 3(b) is also an example of a "project." A "project" is a model of the target structure. 【0019】 In the data supply unit 12, a general-purpose personal computer (hereinafter referred to as "PC") can be used as the construction support device 30 (Figure 4). The construction support device 30 is connected to the management computer (not shown) of the construction unit 14 and the processing unit 16 (Figure 1) via a communication network (not shown) so that they can communicate with each other. Examples of communication networks include the internet, LAN, WAN, public telephone lines, base stations, mobile communication networks, and those interconnected via gateways (including so-called clouds). 【0020】 As shown in Figure 4, the construction support device 30 includes a control unit 31, a storage unit 32, a communication unit 33, etc., and peripheral devices include an operation unit 34 and a display unit 35, etc. 【0021】 The control unit 31, although not shown in the diagram, is composed of a CPU (Central Processing Unit), ROM (Read Only Memory), RAM (Random Access Memory), etc. The CPU of the control unit 31 loads various computer programs stored in the ROM and memory unit 32 onto the RAM and executes them. The control unit 31 may be any processing circuit or arithmetic circuit equipped with multiple CPUs, a multi-core CPU, a GPU (Graphics Processing Unit), a microcontroller, volatile or non-volatile memory, etc. 【0022】 The control unit 31 includes a 3D model creation unit 36, a reinforcement drawing creation unit 37, a summary table creation unit 38, a reinforcement information calculation unit 39, and a 2D code creation unit 40, etc. The 3D model creation unit 36 ​​creates information for the 3D model 22 shown in Figure 2. The reinforcement drawing creation unit 37 creates information for the reinforcement drawing 24 (Figure 2), and the summary table creation unit 38 creates information for the summary tables (Figure 2, Figures 9(a), (b)). 【0023】 The rebar information calculation unit 39 performs calculations on rebar information used by the 3D model creation unit 36, the reinforcement drawing creation unit 37, the summary table creation unit 38, and the 2D code creation unit 40. The 2D code creation unit 40 creates information for the 2D code that will be displayed on management tags (picture tags), etc. 【0024】 These 3D model creation unit 36, reinforcement drawing creation unit 37, schedule creation unit 38, reinforcement information calculation unit 39, and 2D code creation unit 40 are functional modules that the CPU of the control unit 31 executes according to the BIM program. Of these functional modules, the details of the schedule creation unit 38, the reinforcement information calculation unit 39, and the 2D code creation unit 40 will be described later. 【0025】 The memory unit 32 is a non-volatile memory unit that includes semiconductor memory such as ROM or RAM, an HDD (Hard Disk Drive), or an SSD (Solid State Drive) for storing various types of information. The memory unit 32 stores operating system programs, driver programs, application programs, and data used for processing in the processor (in this case, the control unit 31). 【0026】 The program stored in the storage unit 32 may be provided on a non-temporary recording medium (not shown) on which the program is recorded in a readable format. Examples of recording media include portable memory such as CD-ROM, USB (Universal Serial Bus) memory, SD (Secure Digital) card, microSD card, and CompactFlash (registered trademark). In this case, the control unit 31 reads the program from the recording medium using a reading device (not shown) and installs the read program into the storage unit 32. 【0027】 The program stored in the memory unit 32 may be provided via communication through the communication unit 33. In this case, the control unit 31 obtains the program through the communication unit 33 and installs the obtained program into the memory unit 32. 【0028】 The communication unit 33 is equipped with an interface circuit for communicating with the management computer (not shown) of the construction unit 14 (Figure 1) via a communication network. The communication unit 33 performs wired or wireless data communication in accordance with a predetermined communication protocol. For example, if information to be sent to the construction unit 14 is input from the control unit 31, the communication unit 33 transmits the input information to the construction unit 14. The communication unit 33 outputs the information received from the construction unit 14 via the communication network to the control unit 31. 【0029】 The construction support device 30 is connected to an operation unit 34 and a display unit 35. The operation unit 34 is an operation input means such as a keyboard, mouse, or touch panel. Although only one operation unit 34 is shown in Figure 4, the operation unit 34 comprehensively represents these operation input means. The display unit 35 is a display means such as a general display device. 【0030】 Furthermore, a general-purpose PC can be used as the management computer (not shown) for the construction unit 14 (Figure 1). Similarly, the processing unit 16 (Figure 1) also uses a management computer (not shown) to communicate with the construction unit 14 via a communication network. The management computers for the construction unit 14 and the processing unit 16 can have the same hardware configuration as the construction support device 30. 【0031】 In the control unit 31 of the construction support device 30 (Figure 4) of the data supply unit 12, the rebar information calculation unit 39 has functions for performing various calculations related to rebar (described later). The rebar information calculation unit 39 also has functions such as rounding up and rounding down of numerical values, and numerical conversion between units of millimeters, centimeters, and meters. Furthermore, the rebar information calculation unit 39 also has functions for calculating the length of rebar, and calculating the weight and estimated price of rebar from the length of rebar. The rebar information calculation unit 39 may perform numerical calculations using a spreadsheet software program (hereinafter referred to as "spreadsheet software") installed in the construction support device 30. 【0032】 The 2D code creation unit 40 creates a 2D code based on the rebar information obtained by the rebar information calculation unit 39. The 2D code contains information on the dimensions of each part of the rebar that is to be manufactured. The 2D code is transmitted to the processing unit 16 via the construction unit 14 and read by the rebar processing machine (reference numeral 17 in Figure 1) in the processing unit 16. The rebar processing machine 17 bends the straight rebar before processing to produce rebar of the desired shape and dimensions. Here, the rebar processing machine 17 in Figure 1 is shown merely as an icon and does not specifically represent the configuration of the rebar processing machine 17 actually used in the processing unit 16. 【0033】 Furthermore, the control unit 31 has a variety of functions in addition to those of the rebar information calculation unit 39 and the 2D code creation unit 40, but a detailed explanation of these will be omitted here. 【0034】 <Hierarchical structure of reinforcing bar objects> Figure 5 shows an example of a rebar object handled in a BIM program. In a BIM program, rebars are classified by shape, and each classification constitutes a "family." The rebar object shown in the example in Figure 5 is classified into a "family" of rebars with a U-shaped form (as in the Japanese katakana character). 【0035】 The term "family" as described above refers to one level in various types of information that have a hierarchical structure. In the BIM program of this embodiment, the model of the target building is defined as a "project," and below this "project," various levels such as "category," "family," and "type" are defined. 【0036】 Of these hierarchies, "Category" is the highest level relative to the others, and "Type" is the lowest level relative to the others. "Family" is a level positioned between "Category" and "Type". 【0037】 For example, the "Category" includes classifications such as "Column," "Wall," and "Window." Furthermore, the "Category" of "Column" includes "Families" such as "Cylindrical Column" and "Rectangular Column." 【0038】 The "family" for "cylinder" has defined "types" such as "cylinder (diameter 450mm)" and "cylinder (diameter 600mm)". The "family" for "rectangular column" has defined "types" such as "rectangular column (450mm x 600mm)" and "rectangular column (600mm x 750mm)". 【0039】 In this embodiment, a "category" of "reinforcement bars" is created. The "category" of "reinforcement bars" defines multiple types of "families" relating to U-shaped, square, or other shapes of reinforcement bars. Furthermore, for each type of "family," multiple types with different sizes of common parts are defined. 【0040】 In BIM programs, various other "categories," "families," and "types" are defined. Information on objects related to each of these "categories," "families," and "types" is retrieved and used from the storage unit 32 (Figure 4). Furthermore, BIM program operators can add "categories," "families," and "types" that are not pre-registered in the library to the library as needed. 【0041】 For example, there are different types of "families," such as "system families," "in-place families," and "embeddable families." Of these, "system families" are the basic families and include things like walls, floors, roofs, ceilings, and stairs. 【0042】 "In-place families" are families that allow the user to modify the shape of the object. "Importable families" are families that are created individually and loaded from a library into a project file for use. Examples include windows, doors, furniture, and equipment from a specific building materials manufacturer. It is possible to create parts that constitute a unique design in a building using "in-place families," and create general parts that can be used in multiple buildings using "importable families." 【0043】 Such multi-family functionality may also be present in conventional, general-purpose BIM programs. However, the inventors have defined novel parameters for rebar objects that were not previously available, making the BIM program even more effective. This point will be explained below. 【0044】 <Parameters for the rebar object> In the example in Figure 5, for reinforcing bar objects (hereinafter referred to as "reinforcing bar objects") of the same classification (corresponding in this case to the "family" of "U-shaped") but different sizes (corresponding to "type"), the following information is shown: "number", "diameter", "shape", "dimension a", "dimension b", "dimension c", "dimension d", "dimension e", "length of reinforcing bar", "unit weight", "weight per bar", "number of bars", and "weight of reinforcing bar". 【0045】 Each rebar object is assigned detailed length information (such as "dimension a", "dimension b", "dimension c", "dimension d", and "dimension e") that determines its diameter, weight, and shape. In the example in Figure 5, dimension a is the length of the straight section that makes up the central part of Figure 5 (hereinafter referred to as the "central straight section"). 【0046】 Dimensions b and d are the lengths of the straight sections located to the left and right of the central straight section in Figure 5 (referred to here as the "left straight section" and the "right straight section"). Dimensions c and e are the lengths of the arc-shaped sections connecting the central straight section and the left and right straight sections in Figure 5 (referred to here as the "bent section"). 【0047】 In the example in Figure 5, three types of rebar objects (F1-F3) with different a-dimensions or b-dimensions are shown. Various pieces of information relating to the rebar objects (F1-F3 in this case) function as parameters. By changing the various pieces of information relating to the rebar objects (F1-F3 in this case) the operator changes the values ​​of the corresponding parameters, and the type of rebar object is changed. 【0048】 <Example of parameter input> Figure 6 shows an example of the screen display during the input process for parameters of a reinforcing bar object. On the left side of Figure 6, a U-shaped reinforcing bar object 42A is displayed. The "defined parameters" and arrows shown for the reinforcing bar object 42A are added for the purpose of explaining this embodiment. 【0049】 For the rebar object 42A, as indicated by the "defined parameters" text and arrows, when the operator inputs dimensions for the straight sections (parts a to c), various parameters, including information about the bent sections (hereinafter referred to as "bent section information"), are automatically calculated and displayed in the parameter table 42B shown on the right side of Figure 6. 【0050】 In the example in Figure 6, the dimensions of the straight section of the reinforcing bar object 42A are entered as a (dimension of section a) = 1200 [mm], b (dimension of section b) = 600 [mm], and c (dimension of section c) = 1200 [mm]. Accordingly, parameter table 42B displays the entered dimensions a to c, as well as information about the bend (radius of the arc in the bend) and other information about the straight section. Here, in the example in Figure 6, unlike the example in Figure 5, section c is the straight section on the left. 【0051】 The input dimension value is the sum of the straight and bent sections. In the example in Figure 6, the rebar diameter is 10 [mm], and the bending diameter calculated based on this diameter is 27.6 [mm]. If a dimension value of 1200 [mm] is entered for section a, the breakdown of the dimension for section a is the bending diameter + the exact length of the straight section in millimeters (hereinafter referred to as "millimeters," with one decimal place) + the bending diameter. Specifically, the breakdown of the dimension for section a is 27.6 [mm] + 1144.8 [mm] + 27.6 [mm] = 1200 [mm]. 【0052】 In this way, by inputting a dimension value that includes the bending diameter (in this case, 1200 [mm]) as the dimension value of the straight section, the system distinguishes between the dimensions of the straight section in millimeters (straight section information) and the bending section information such as the bending diameter, and performs calculations for various parameters. 【0053】 Although the U-shaped rebar object 42A is used as an example here, for other families of rebar objects (not shown), the dimensions of the straight sections can be entered to calculate the straight section information and bent section information in millimeters. 【0054】 In BIM programs, parameter values ​​can be freely changed. It is also possible to perform operations on parameters (addition, subtraction, multiplication, division, and operations on functions including parameters). Furthermore, BIM programs create various types of information for rebar objects using new parameters. Finally, BIM programs aggregate various types of information based on the created data. 【0055】 <New parameter> The BIM program in this embodiment has a function to calculate the length and weight of reinforcing bars using the center dimension (described later) of the reinforcing bar having a bend (also called "bent reinforcing bar"). The construction support method of this embodiment, which is performed using the BIM program, comprises a 3D model information creation step that creates 3D model information for the 3D model using the center dimension information of the bent reinforcing bar in millimeters and the outer dimension information in a unit larger than millimeters (here in centimeters) as parameters for the 3D model of the bent reinforcing bar, and a reinforcing bar manufacturing information creation step that creates reinforcing bar manufacturing information based on the 3D model information, and at least in the 3D model information creation step, the 3D model information is created including the center dimension information. 【0056】 "Center dimension information" corresponds to information representing the dimensions (length) of parts along the center line of the reinforcing bar (such as center line C in Figure 7(a)), as will be explained later. "External dimension information" corresponds to information representing the dimensions (length) of parts along the outer surface of the reinforcing bar (such as outer surface 47 in Figure 7(b)). "3D model information" corresponds to information of the 3D model of the bent reinforcing bar (such as the information of the bent reinforcing bar shown in the summary table in Figure 9(b)). The "3D model information creation process" is the process of creating the "3D model information". "Reinforcing bar manufacturing information" corresponds to information created based on the "3D model information" (such as 2D codes and information used to create 2D codes). The "Reinforcing bar manufacturing information creation process" is the process of creating the "Reinforcing bar manufacturing information". Figures from Figure 7 onwards will be explained later. 【0057】 Furthermore, the construction support method of this embodiment includes, at least in the rebar fabrication information creation step, a rebar fabrication information output step that creates rebar fabrication information including external dimension information, and converts the rebar fabrication information into a readable code (such as a 2D code) that can be read by a reading device (such as an optical 2D code reader) and outputs it. 【0058】 Furthermore, the construction support method of this embodiment includes a length calculation step that calculates the length information of the bent reinforcing bar using the central dimension information, and a weight calculation step that calculates the weight information of the bent reinforcing bar based on the length information. "Length information of the bent reinforcing bar" is information that represents the length (total length) of the reinforcing bar. "Weight information of the bent reinforcing bar" is information that represents the weight of the reinforcing bar. 【0059】 The novel parameters defined in this embodiment are information relating to the center dimensions of the bent portions (parts c and e in the example of Figure 5) in the reinforcing bar object. Specifically, the novel parameters are the center dimensions in millimeters relating to the bent portions, and various other pieces of information such as the length and weight of the reinforcing bar calculated using these center dimensions. 【0060】 The bending diameter, one of the pieces of information about the bending section, is calculated using the center dimension of the reinforcing bar. Figure 7(a) schematically shows the center dimension in a U-shaped reinforcing bar object. In the example in Figure 7(a), the center dimension is represented not by a specific numerical value or symbol, but by the length of the center line C, which is shown by a dashed line. 【0061】 In the example shown in Figure 7(a), the reinforcing bar object 46 is composed of a central straight section (section a), left and right straight sections (sections b and d), and bent sections (sections c and e). The center dimension can be said to be the length of a hypothetical line (centerline C) passing through the center of the reinforcing bar object 46, assuming the diameter of the reinforcing bar in the object. 【0062】 The dimensions of the outer surface 47 of the reinforcing bar object 46 that are outside the center line C (outer surface dimensions) are larger than the center dimensions. Figure 7(b) schematically shows the outer surface 47 with a thick line 47a. The outer surface dimensions are represented by the length of the thick line 47a that shows the outer surface 47. The reinforcing bar object 46 illustrated here has a nearly circular cross-section. Therefore, the outer surface 47 in Figure 7(b) corresponds to the ridge outside the center line C. 【0063】 In Figure 7(b), the inner surface 48 of the reinforcing bar object 46, located inside the center line C, is schematically shown by the thick line 48a. The dimensions of the inner surface 48 (inner surface dimensions) are represented by the length of the thick line 48a that indicates the inner surface 48. The inner surface 48 corresponds to the ridge line located inside the center line C. 【0064】 The outer surface 47 is located outside the center line C. Therefore, the outer surface dimension is larger (longer) than the center dimension. Similarly, the inner surface 48 is located outside the center line C. Therefore, the inner surface dimension is smaller (shorter) than the center dimension. 【0065】 Figure 8(a) shows a magnified view of one of the bends (section c) in the reinforcing bar object 46. The length of the bend is defined as the length of the centerline Cc in the bend. The length (total length) of the reinforcing bar object 46 is defined as the length of the centerline C. The length (total length) of the reinforcing bar object 46 is expressed as the sum of the length of the centerline Ca in the central straight section, the lengths of the centerlines Cb and Cd on the left and right sides, and the lengths of the centerlines Cc and Ce in the two bends, as shown in Figure 8(b). 【0066】 The length of the bent section (the length of the centerline Cc, which is the center dimension, and / or the length of the centerline Ce) is one of the pieces of information about the bent section. In this embodiment, the functions of the summary table creation unit 38 make it possible to create a summary table that does not include the bent section information (Figure 9(a)) and a summary table that includes the bent section information (Figure 9(b)). 【0067】 Figure 9(a) shows an example of a summary table that does not include bending information. In the example in Figure 9(a), the "number" representing a rebar object that has the same shape as rebar object 42A in Figure 6 is "F2", and the "shape" of this F2 rebar object is represented as "C-1". 【0068】 In Figure 5, the symbol F2 is also used. Figure 5 shows information about a different rebar object than the rebar object shown in Figure 9(a). Therefore, even though the symbols used are the same, the dimensions of each part of the F2 rebar object in Figure 9(a) and the F2 rebar object in Figure 5 are different. 【0069】 In Figure 9(a), the rebar object (hereinafter referred to as "rebar object F2") has a dimension of a = 500 [mm]. Furthermore, the dimensions of the straight sections b and c are b = 150 [mm] and c = 150 [mm], respectively. In contrast, in Figure 5, the dimensions of the corresponding sections a, b, and d of rebar object F2 are 8,036 [mm], 673 [mm], and 1,740 [mm]. Also, in Figure 5, the bent sections c and e are defined, but in Figure 9(a), the bent sections are not defined. 【0070】 In the summary table in Figure 9(a), the "length of the rebar" for rebar object F2 is 750 [mm]. The value of a+b+c related to rebar object F2 is 800 (=500+150+150) [mm]. However, the reason why the "length of the rebar" in the summary table in Figure 9(a) is 750 [mm] is to take into consideration the ease of use when using the summary table in Figure 9(a) at the construction site. 【0071】 In other words, centimeters (cm) are typically used as the unit of length at construction sites. To put it another way, centimeters are the unit used for information sharing and communication among stakeholders at construction sites. 【0072】 Therefore, even if the exact length of the required reinforcing bar in millimeters is, for example, 741 mm, the value used at the construction site will be rounded up to 750 mm (= 75 cm). Furthermore, if the value used at the construction site were rounded down to, for example, 740 mm (= 74 cm), it could result in insufficient length or strength of the reinforcing bar, so the rounded-up value is usually adopted. 【0073】 Based on these findings, the summary table in the example of Figure 9(a) displays a value of 750 [mm] as the "length of the reinforcing bar" for reinforcing bar object F2. 【0074】 The value of 750 [mm] for the "length of the reinforcing bar" has been rounded up so that the last digit of the number in millimeters is 0 (zero). Therefore, those involved at the construction site can convert from millimeters to centimeters by mentally dividing the value of 750 [mm] by 10. Thus, conversion from millimeters to centimeters is easy at the construction site. 【0075】 Furthermore, the relationship between the values ​​a=500[mm], b=150[mm], and d=150[mm] for the rebar object F2 in Figure 9(a) and the value of 750[mm] for the "length of the rebar" was determined with ease of work at the construction site in mind. 【0076】 Specifically, at the construction site, a straight bar of reinforcing steel is processed using a reinforcing steel processing machine (hereinafter referred to as a "bending machine"). Various general types of bending machines can be used. When creating a U-shaped reinforcing steel based on the values ​​related to the reinforcing steel object F2 in Figure 9(a), the reinforcing steel processing is carried out so that sections a, b, and d are 500 [mm] (= 50 [cm]), 150 [mm] (= 15 [cm]), and 150 [mm] (= 15 [cm]), respectively. 【0077】 Figure 10 schematically represents the information necessary for workers performing processing work. Comparing Figure 10 with Figure 7(a), the arc-shaped bends (sections c and e) in Figure 7(a) have been changed to right angles in Figure 10. As shown in Figure 10, workers can produce the desired type of reinforcing bar by recognizing the dimensions that include the bends (sections c and e) in Figure 7(a) within the straight sections (sections a to c) and performing the processing work. The numerical values ​​that workers at the construction site use during the work are the external dimensions. 【0078】 As mentioned above, the external dimensions are larger than the center dimensions. Furthermore, consider a reinforcing bar object 46A, where the bent sections (parts c and e) of the reinforcing bar object 46 shown in Figure 7(a) are changed to a right-angle shape, and the bent sections are straightened as shown in Figure 10. For this reinforcing bar object 46A, the length of the reinforcing bar (external dimensions, center dimensions, and internal dimensions) is longer than that of the reinforcing bar object 46 in Figure 7(a) where the bent section is arc-shaped. 【0079】 In the summary table in Figure 9(a), sections a, b, and d are 500 [mm], 150 [mm], and 150 [mm], respectively. Summing these values ​​together gives 800 (= 500 + 150 + 150) [mm]. 【0080】 However, the workers at the construction site prepare a straight bar of 750 mm (= 75 cm) in length (the bar before processing) according to the "bar length" value in the summary table in Figure 9(a). Furthermore, the workers at the construction site process the bar so that the outer dimensions of sections a, b, and d are 50 cm, 15 cm, and 15 cm, respectively. As a result, a U-shaped bar is produced whose actual length (total length based on the center dimension) is shorter than the sum of sections a, b, and d in the summary table, which is 800 mm, and also shorter than the "bar length" value. 【0081】 Thus, the 750 [mm] value in the "Length of Reinforcement Bar" section of the summary table in Figure 9(a) was created with ease of work at the construction site in mind. Furthermore, in the summary table in Figure 9(a), the values ​​for sections a, b, and d are calculated to be larger than the actual lengths of each section of the reinforcement bar being manufactured, taking into account the length of the bent section (length of the bent section based on the center dimension) calculated based on a predetermined formula. 【0082】 The summary table in Figure 9(b) displays more accurate dimensional information compared to the summary table in Figure 9(a), which prioritizes convenience at the construction site. In the example in Figure 9(b), the "shape" of the rebar object F2 in Figure 9(a) is "C-1," the same as in Figure 9(a). Hereafter, the rebar object in Figure 9(b) whose "shape" symbol is displayed as "C-1" will be referred to as "rebar object C-1" to distinguish it from the rebar object F2 in the summary table of Figure 9(a). 【0083】 In the summary table in Figure 9(b), the symbols a to e assigned to each part of the reinforcing bar object C-1 are the same as the symbol assignments shown in Figure 5. Specifically, the central straight section is designated as part a, the left and right straight sections as parts b and d, and the bent sections as parts c and e. 【0084】 In the summary table for the example in Figure 9(b), the dimension of section a of rebar object C-1 is a = 409 [mm]. Furthermore, the dimensions of sections b and d of rebar object C-1 are b = 105 [mm] and d = 105 [mm]. The dimensions of sections c and e, which are the bent sections, are c = 61 [mm] and e = 61 [mm]. 【0085】 The following formula (1) is used to calculate the length of the bent section (sections b and d) in the family of rebar object C-1. In the example in Figure 9(b), the diameter of the rebar object C-1 is 13 [mm]. (Length of the bent section) = 1.5 × π (pi) × (rebar diameter) ... Equation (1) 【0086】 Substituting the diameter value of 13 mm into equation (1), the length of the bent section (length of section b = length of section d) is 1.5 × π (= 3.14) × 13 = approximately 61.23. Rounding the resulting value to the nearest whole number, the value is 61 mm, and this value is displayed in columns "c" and "e" of the summary table in Figure 9(b). 【0087】 Note that the formula for calculating the length of the bent section (length of section c and section d) may differ depending on the family of the reinforcing bar. 【0088】 In the example in Figure 9(b), the value of a+b+c+d+e in rebar object C-1 is 741 (=409+105+61+105+61) [mm]. While this calculated value is 741 [mm], the displayed "rebar length" is 750 [mm]. This is because the calculated "rebar length" value has been rounded up so that the last digit of the millimeter value is 0 (zero). 【0089】 Thus, by using the values ​​of the bends displayed in the summary table in Figure 9(b), a more accurate "length of the reinforcing bar" can be calculated. The information on the bends (sections c and e) (bending information) is obtained by incorporating a routine into the BIM program that performs calculations using mathematical formulas such as Equation 1, and the reinforcing bar information calculation unit 39 (Figure 4) performs the calculations. 【0090】 The BIM program contains formulas for the bending of reinforcing bars in various families. For example, a designer can select a family and enter a value for the "diameter" to calculate the bending information. Then, by entering values ​​for other parameters related to the reinforcing bar object (in this case, reinforcing bar object C-1) (lengths of sections a, b, and d), a more accurate "length of the reinforcing bar" can be calculated. 【0091】 The BIM program calculates information on various rebar objects (3D model information, rebar fabrication information, center dimension information, external dimension information, etc.) using the method described above. Furthermore, the BIM program combines the information on various rebar objects and other "category" information to create a 3D model of the project (Figure 2). 【0092】 To accurately calculate and display the length of reinforcing bars, it is effective to perform calculations using the center dimension, as in this embodiment. However, at the construction site related to construction section 14 (Figure 1), the process of calculating the distance from the center line by halving the reinforcing bar diameter, and then subtracting or adding the calculated value to the dimensions given in the summary table, etc., to accurately determine the required length of reinforcing bar is cumbersome for workers and reduces work efficiency. For this reason, it is difficult to perform work based on the center dimension of the reinforcing bar at the construction site, and work based on the outer dimension, which is relatively easier to perform, is carried out instead. 【0093】 Furthermore, if the summary sheet provided to the construction site (Figure 9(a)) indicates that construction must take into account the length of the bend, then the construction site will need to perform cumbersome verification work using rebar diameter and pi, increasing the possibility of human error. 【0094】 Furthermore, in the reinforcement drawings (Figure 2) that serve as the basis for creating the summary tables, the bent sections are often not shown in the drawings. Also, in 3D models, they may be hidden in the projection direction and not visible unless the viewpoint of the 3D model is changed. For these reasons, it is difficult to calculate the center dimensions of the bent sections retrospectively. 【0095】 However, as in the construction support system 10 of this embodiment, by generating information on rebar objects using the center dimension of the bend as a parameter in the data supply unit 12, which is the upstream of the information, it becomes possible to create accurate information on rebar objects in a unified manner without having to determine the dimensions of the bend from a 3D model or have the dimensions of the bend calculated by the rebar processing company. 【0096】 <Using 2D codes> The BIM program converts information about the rebar object into a 2D code that operates the bending machine. The 2D code created by the BIM program is printed on a management tag (picture tag) and attached (or affixed) to the straight rebar product before bending. The 2D code printed on the management tag is read by, for example, an optical 2D code reader and input into the bending machine as processing information. The bending machine operates based on the input processing information and bends the straight rebar to produce rebar of the desired shape. 【0097】 <Estimate of weight and price> Furthermore, the BIM program calculates the weight of the reinforcing bars using information on "reinforcing bar length" and "diameter," including information on the length of the bend based on the center dimension, as shown in the summary table in the example in Figure 9(b). The weight of the reinforcing bars can be determined by the following formula (2). The specific gravity of steel, the material of the reinforcing bars, is approximately 7.85. π / 4 × (diameter [mm]) 2 × (Length of rebar [mm]) × (Specific gravity of rebar material) × 10 6 ...Equation (2) 【0098】 This type of rebar weight calculation can be performed for all rebar used in the 3D model. Therefore, by calculating and summing the weights of all the rebars subject to the weight calculation, the total weight of multiple rebars can be calculated. Furthermore, by multiplying the calculated weight by the unit price of the material (price per unit weight), the price of the rebar in question can be calculated. Since these calculations are performed using accurate bending information, it is possible to calculate more accurate estimated weights and estimated prices. 【0099】 <Classification of reinforcing bar objects based on tolerance for change> The BIM program in this embodiment has a function to calculate the length and weight of the reinforcing bar using the center dimension of the bent reinforcing bar (Figure 7(a)). It is designed to handle multiple types of reinforcing bar objects with different tolerances for dimensional changes. 【0100】 Figures 11(a) to (c) schematically show the classification of reinforcing bar objects based on the tolerance of modification. In this embodiment, the construction support method performed using a BIM program includes, as shown in Figure 11(a), a first and second bent reinforcing bar family in the 3D model of the bent reinforcing bar, which can constitute the project. 【0101】 "Project" is a model of the target building. "First Bent Reinforcement Family" and "Second Bent Reinforcement Family" are families related to bent reinforcement that are classified as different families from each other. 【0102】 The first bending reinforcement family is shared across multiple projects, as shown in Figure 11(b). In Figure 11(b), the first bending reinforcement information 1 is used in common between Project 1 and Project 2, which are different projects. For example, if the same U-shaped reinforcement (e.g., the reinforcement shown in Figure 7(a)) is used in a beam-column connection project (or the beam-column connection shown in Figure 3(a)), this is an example of the first bending reinforcement family being shared across multiple projects. The "second bending reinforcement family" may include those that cannot be shared across multiple projects. 【0103】 "First Bending Reinforcement Information 1" refers to one of the First Bending Reinforcement Information items included in the First Bending Reinforcement Family. In other words, as shown in Figure 11(a), the First Bending Reinforcement Family contains First Bending Reinforcement Information related to at least one bending reinforcement. In the example in Figure 11(a), the First Bending Reinforcement Family includes First Bending Reinforcement Information 1 to First Bending Reinforcement Information 3. The number of First Bending Reinforcement Information types may be two or fewer, or four or more. 【0104】 The second bending reinforcement family also includes second bending reinforcement information relating to at least one bending reinforcement. In the example in Figure 11(a), the second bending reinforcement family includes second bending reinforcement information 1 to second bending reinforcement information 3. The number of types of second bending reinforcement information may be two or fewer, or four or more. 【0105】 For the first bending reinforcement information (first bending reinforcement information 1 to first bending reinforcement information 3 in the example of Figure 11(a)), the center dimension of the bend in the bending reinforcement can be set within the range constrained by a formula based on the reinforcement diameter. 【0106】 "Center dimension of the bend" refers to the center dimension of the bend in the bend of the reinforcing bar (e.g., sections c and e in Figure 7(a)) (e.g., the length of the center line Cc and the length of the center line Ce in Figure 8(b)). "Formula based on reinforcing bar diameter" refers to a formula that uses the reinforcing bar diameter as a parameter (e.g., formula (1) "(length of the bend) = 1.5 × π (pi) × (reinforcing bar diameter)"). "Can be set within the range constrained by the formula" means that it is constrained to a range that can be obtained by substituting arbitrary values ​​into the parameters (reinforcing bar diameter, etc.) of the various formulas. 【0107】 Regarding the second type of bent reinforcement information, the center dimension of the bend in the bent reinforcement can be set arbitrarily. "The center dimension of the bend can be set arbitrarily" means that the center dimension of the bend can be defined by arbitrarily entering a numerical value without being restricted by a predetermined formula (such as formula (1)). It is possible to directly input an arbitrary value for the "center dimension of the bend". 【0108】 The mathematical formula (such as formula (1)) includes at least pi (π) as a constant, and pi is used to at least two decimal places (up to 3.14). 【0109】 For projects related to the first bent rebar family, for example, it is possible to arbitrarily change the dimensions of the straight sections (straight portions) of the rebar (first bent rebar information) in the rebar arrangement diagram shown in Figure 3(a) (or Figure 3(b)) by dragging with the mouse while viewing the screen. Furthermore, for example, it is possible to arbitrarily change the dimensions of the straight sections (straight portions) of the rebar object 42A, as shown in Figure 6, by dragging with the mouse or by entering numerical values ​​for the straight sections in the parameter table 42B. However, the length dimension of the bent section cannot be changed from the range constrained by the aforementioned formula. The formula differs depending on the rebar diameter. 【0110】 "Projects related to the first bent rebar family" refers to multiple projects that can share the first bent rebar family (first bent rebar information 1 to first bent rebar information 3 in the example of Figure 11(a)). "While displaying on the screen" means while displaying the modeling content on the display unit 35 (Figure 4), etc., so that it can be visually confirmed. "Straight section" refers to the straight part of the rebar (sections a, b, and d in Figure 7(a)). 【0111】 Regarding the dimensions of the straight section (straight portion), "arbitrarily changeable" means that the dimensions (length) of the "straight section" can be extended or contracted to any value without being constrained by a mathematical formula (such as formula (1)). "Length dimension of the bent section" means the length dimension expressed as the center dimension of the bent section. "The length dimension of the bent section cannot be changed from the range constrained by the aforementioned mathematical formula" means that, with respect to the project section relating to the first bent reinforcement family, the length of the straight section can be arbitrarily changed, but the length dimension of the bent section is constrained by the mathematical formula. 【0112】 <Advantages of the invention according to this embodiment> As described above, with the construction support system 10 of this embodiment, information on rebar objects (such as rebar manufacturing information and external dimension information) created by a BIM program in the data supply unit 12 is used in the construction unit 14 and the processing unit 16. Furthermore, the information on the rebar objects is adjusted to the necessary values ​​and units in the data supply unit 12, the construction unit 14, and the processing unit 16 before being supplied. 【0113】 The dimensions of the bend can be represented by the center dimension in the data supply unit 12 (Figure 1). The length of the reinforcing bar is then represented numerically, including the center dimension of the bend. As a result, the information on the length of the reinforcing bar is accurately represented, and accurate information regarding the length of the reinforcing bar can be provided to the construction unit 14. Therefore, it becomes possible to provide accurate information based on the center dimension. 【0114】 Furthermore, the data supply unit 12 can provide the construction unit 14 with information regarding the length of the reinforcing bars, both expressed by their center dimensions and their outer dimensions. Therefore, the construction unit 14 and the processing unit 16 do not need to manually convert the information obtained from upstream into the necessary information. This enables consistent data exchange from the design to the manufacturing of the reinforcing bars, free from human error. 【0115】 Furthermore, the information on the rebar objects created in the data supply unit 12 includes information on the length of the bend, calculated in millimeters. Therefore, it is possible to perform various simulations accurately based on accurate information regarding the length of the rebars. For example, it becomes possible to accurately check for interference between rebars in rebar arrangement drawings (e.g., Figures 3(a) and (b)) and to make various estimates related to the rebars. Accurate estimates can be made in the data supply unit 12. In addition, by providing accurate information regarding the length of the rebars from the data supply unit 12 to the construction unit 14, the construction unit 14 can also make accurate estimates. Therefore, the construction unit 14 does not need to place orders that may include excessive surplus in the processing unit 16, and costs can be reduced. 【0116】 Furthermore, as shown in Figures 11(a) to (c), different types of rebar objects can be created depending on the tolerance for modification, allowing for the creation of 3D models in a variety of ways. 【0117】 Based on these findings, the invention relating to the construction support method, construction support program, and construction support device 30 of this embodiment makes it possible to develop the digital twin concept, which reproduces real space on a virtual space (digital space), into something more useful and practical. 【0118】 The embodiments described above are merely examples of how the present invention can be implemented, and the technical scope of the present invention should not be interpreted as being limited by them. In other words, the present invention can be implemented in various forms without departing from its gist or its main features. 【0119】 For example, in the example shown in Figure 1, various types of information (such as processing logs and 2D codes) are provided from the data supply unit 12 to the processing unit 16 via the construction unit 14. However, the data supply unit 12 may be configured to provide various types of information to the processing unit 16 without going through the construction unit 14. [Explanation of symbols] 【0120】 10: Construction support system 12: Data Supply Unit 14: Construction department 16: Processing section 17: Rebar processing machine 22: 3D Model 24: Reinforcement drawing 26: Summary Table 30: Construction support equipment 31: Control Unit 32: Storage section 33: Communications Department 34:Operation unit 35:Display section 36: 3D Model Creation Department 37: Reinforcement Drawing Creation Department 38: Summary Table Creation Department 39: Reinforcement Information Processing Unit 40: 2D Code Creation Department 42A, 46, F2, C-1, 46A: Reinforcement bar object 47: External surface 48: Inner self C, Ca~Ce: Center line

Claims

[Claim 1] A method for supporting the construction of a building using three-dimensional modeling of bent reinforcing bars, As parameters for the three-dimensional model of the bent reinforcing bar, the center dimension information of the bent reinforcing bar in millimeters and the outer dimension information in units larger than millimeters are used. A three-dimensional model information creation process for creating three-dimensional model information related to the aforementioned three-dimensional model, A process for creating rebar fabrication information, which creates rebar fabrication information based on the aforementioned 3D model information, The process includes a step of creating a summary table that includes the three-dimensional model information, In the three-dimensional model information creation step, the three-dimensional model information is created including the center dimension information. The construction support method, in the process of creating the summary table, is capable of creating a summary table showing the external dimension information and a summary table showing the central dimension information.

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