JP6596610B1 - ROOF, ROOF DESIGN METHOD, AND ROOF DESIGN DEVICE - Google Patents

Abstract

[PROBLEMS] To reduce the burden on the lower structure while providing a rise of the roof, and to suppress the labor and cost of the improvement. A roof 11 is a truss-structured roof 11 having a plurality of upper chord members 21 and a plurality of lower chord members 31 that form a curved surface that protrudes upward, and includes a plurality of upper chord members 21 and a plurality of lower chords. Each of the materials 31 is formed in an annular shape with the outer peripheral material 51, the first material 52 extending in the crossing direction Dx and spanning the outer peripheral material 51, and extending in the spanning direction Dy while intersecting the first material 52. It extended in the direction which cross | intersects the 2nd material 53 spanned by the outer periphery material 51, the crossing direction Dx and the spanning direction Dy, and was spanned by the outer periphery material 51, intersecting the 1st material 52 and the 2nd material 53. The reinforcing members 54 of the upper chord member 21 and the lower chord member 31 are formed by a rigid body 60 that is continuous and extends linearly in a plan view. [Selection] Figure 2

Description

  The present invention relates to a roof, a roof design method, and a roof design apparatus.

  2. Description of the Related Art Conventionally, a roof formed by a truss as described in, for example, Patent Documents 1 and 2 below is known.

JP 2000-170308 A Japanese Patent Laid-Open No. 9-111943

  However, in the conventional roof, there is room for improvement in reducing the burden on the lower structure that supports the roof while providing, for example, a rise of the roof. However, as a result of the improvement, for example, when the member constituting the roof has a three-dimensionally curved shape, it takes time to design and process the member.

  The present invention has been made in view of the above-described circumstances, and aims to reduce the burden on the lower structure while providing the rise of the roof, and to suppress labor and cost due to the improvement. To do.

In order to solve the above problems, the present invention proposes the following means.
The roof according to the present invention is a roof of a truss structure having a plurality of upper chord members and a plurality of lower chord members forming a curved surface that protrudes upward, and the plurality of upper chord members and the plurality of lower chord members are respectively The outer peripheral member formed in an annular shape, the first member extending in the direction of the beam and spanning the outer peripheral member, and extending in the spanning direction and spanning the outer peripheral member while intersecting the first member. A second material, and a reinforcing material that extends in a direction intersecting the crossing direction and the spanning direction, and spans the outer peripheral material while intersecting the first material and the second material, and The reinforcing material of the upper chord material and the lower chord material is formed of a rigid body that extends continuously and forms a circular arc in a plan view.

For example, when a rise is provided on the roof for the purpose of satisfying design requirements (such as the effective height of the indoor space under the roof) and legal conditions (such as a water gradient), each of the first material and the second material, Thrust force corresponding to the rise is generated. When this thrust force is borne by the lower structure supporting the roof, the first material and the second material are, for example, pin-joined to the lower structure, and the lower structure is utilized by utilizing the arch effect of the first material and the second material. The thrust force.
For example, the thrust force described above increases when the distance in the direction of the beam in the outer peripheral material and the distance in the spanning direction are large (in the case of a so-called large span structure). In this case, if the thrust force is borne by the lower structure, it is necessary to increase the strength of the lower structure. As a result, for example, there is a problem in that the pillars of the pillars in the lower structure become large and the indoor space under the roof becomes narrow (if the pillar size is restricted due to the design plan, the restriction cannot be observed).
Therefore, a structure that reduces the burden on the lower structure of the thrust force generated in the first material and the second material is desired. For example, the thrust force transmitted to the lower structure can be reduced by forming a part of the support portion between the roof and the column with a roller structure.
In this roof, the reinforcing material extends in a direction intersecting the crossing direction and the spanning direction in a plan view, and spans the outer peripheral material while intersecting the first material and the second material. Therefore, the thrust force generated in the first material and the second material can be transmitted to the reinforcing material, and at least a part of these thrust forces can be borne by the reinforcing material. In other words, the bending moment can be converted into an axial force, and this axial force can be balanced in the roof (self). Thereby, for example, the thrust force and horizontal displacement of the first material and the second material borne by the lower structure can be suppressed, and the degree of freedom in designing the lower structure can be increased. Furthermore, for example, it becomes possible to expect an arch effect due to the reinforcing material, and it is possible to reduce the cost of the roof by eliminating the excessive strength of the members applied to the outer peripheral material, the first material, and the second material. it can.
Further, in this roof, the reinforcing material of the upper chord material and the lower chord material is formed of a rigid body that is continuously extended and forms a circular arc in a plan view. In other words, the rigid body forming the reinforcing material of the upper chord material and the lower chord material is linear in a plan view while curving so that the middle portion is convex upward with respect to both ends. As a result, the rigid body is formed along a plane including both the directions connecting both ends and the vertical direction, and has a two-dimensionally curved shape. Therefore, it is not necessary to curve the rigid body three-dimensionally, and the design and processing can be performed more easily.

  More preferably, the nodes of the second chord material of the lower chord material are located on the same arc.

  Nodes in the same second material are located on the same arc. As a result, the second material has an arcuate shape curved with a constant curvature, and can be easily designed and processed.

  Of the second material that intersects with the reinforcing material on both sides in the spanning direction, the node in the portion located between the reinforcing materials is the reference first material of the lower chord material and the reinforcement of the lower chord material You may be located on the same circular arc which connects a material in the said span direction.

  Of the second material of the lower chord material, the nodes in the portion located between the reinforcing materials are located on the same arc. Therefore, the part located between the reinforcing materials in the second material becomes an arc shape curved with a certain curvature, and the design and processing can be easily performed.

  Of the second material that intersects with the reinforcing material on both sides in the spanning direction, the nodal point in a portion located on the outer side in the spanning direction with respect to the reinforcing material is the outer peripheral material of the lower chord material, The reference first material of the lower chord material and the reinforcing material of the lower chord material may be located on the same arc connecting the span direction.

  Of the second material of the lower chord material, the nodes in the portion located on the outer side in the spanning direction with respect to the reinforcing material are located on the same arc. Therefore, a portion of the second material that is located on the outer side in the tension direction with respect to the reinforcing material has an arc shape that is curved with a constant curvature, and can be easily designed and processed.

  The nodes of the second material that intersect with the reinforcing material only on one side in the spanning direction are the outer peripheral material of the lower chord material, the reference first material of the lower chord material, and the reinforcing material of the lower chord material. You may be located on the same circular arc tied in the span direction.

  Nodes in the second material of the lower chord material that intersects the reinforcing material only on one side in the spanning direction are located on the same arc. Therefore, the second material that intersects the reinforcing material only on one side in the spanning direction becomes an arc shape curved with a certain curvature, and the design and processing can be easily performed.

  The node of the second material that does not intersect the reinforcing material may be located on the same arc connecting the reference first material of the lower chord material and the outer peripheral material of the lower chord material in the spanning direction.

  Nodes in the second material of the lower chord material that does not intersect with the reinforcing material are located on the same arc. Therefore, the second material that does not intersect with the reinforcing material becomes an arc shape curved with a certain curvature, and can be easily designed and processed.

  The node in the second material may also serve as the node in the first material.

  Nodes in the first material also serve as nodes in the second material. Therefore, the first material and the second material intersect at the same node. For this reason, it is possible to easily design the first material and the second material.

  The roof design method according to the present invention is a method for designing the roof, and includes a step of obtaining a reinforcing material arc that is an arc that forms the reinforcing material of the lower chord material. A projection surface that is a plane with the outer peripheral material as a peripheral edge, a first rise that is a rise of a reference first material that is the first material located in the center of the lower chord material in the spanning direction, and the lower chord material A first projection line obtained by projecting a reference arc, which is an arc forming the first reference material, onto the projection surface, and extends in the span direction through the reference arc, and has an edge on the periphery of the projection surface A second projection line obtained by projecting an auxiliary arc, which is an arc located on the projection plane, and a third projection line obtained by projecting the reinforcing material arc on the projection plane are obtained in advance. The reference arc is obtained based on the first rise and the first projection line. A first step, a second step for obtaining a second rise which is a rise at a point on the reference arc located above the intersection of the first projection line and the second projection line, the second rise and the A third step of obtaining the auxiliary arc based on the second projection line, and a third rise that is a rise at a point on the auxiliary arc located above the intersection of the second projection line and the third projection line And a fifth step of obtaining the reinforcing material arc based on the third rise and the third projection line.

  In the roof designing method, the arc shape of the reinforcing material can be easily determined.

  The roof design apparatus according to the present invention is an apparatus for designing the roof, and includes an arithmetic processing unit that obtains a reinforcing material arc that is an arc that forms the reinforcing material of the lower chord material, and the outer peripheral material of the lower chord material. A projection plane that is a plane having a peripheral edge, a first rise that is a rise of a reference first material that is the first material located in the center of the lower chord material in the tension direction, and the reference number of the lower chord material A first projection line obtained by projecting a reference arc, which is an arc forming one material, onto the projection plane, and extends in the span direction through the reference arc, and an edge is located on the periphery of the projection plane A storage unit for storing a second projection line obtained by projecting an auxiliary arc as an arc on the projection plane and a third projection line obtained by projecting the reinforcing material arc on the projection plane; The processing unit is configured to generate the reference circle based on the first rise and the first projection line. A second step for obtaining a second rise, which is a rise at a point on the reference arc located above the intersection of the first projection line and the second projection line, and the second rise And a third step of obtaining the auxiliary arc based on the second projection line, and a rise at a point on the auxiliary arc located above the intersection of the second projection line and the third projection line. A fourth step for obtaining three rises and a fifth step for obtaining the reinforcing material arc based on the third rise and the third projection line are performed.

  In the roof design apparatus, the arc shape of the reinforcing material can be easily determined.

  ADVANTAGE OF THE INVENTION According to this invention, while providing the rise of a roof, while improving it so that the burden with respect to a lower structure can be reduced, it can suppress that an effort and cost are required by improvement.

It is a perspective view of the roof concerning one embodiment of the present invention. It is an expansion perspective view of the principal part of the roof shown in FIG. It is a side surface of the reinforcing material which comprises the roof shown in FIG. It is an expansion perspective view of the principal part of the reinforcing material shown in FIG. It is a block diagram which shows the functional structure of the design apparatus used with the design method of the roof which concerns on one Embodiment of this invention. It is a flowchart which shows the flow of the design method of the roof which concerns on one Embodiment of this invention. It is a flowchart which shows the detailed flow of the design process of the lower chord material in the roof design method which concerns on one Embodiment of this invention. It is a flowchart which shows the detailed flow of the process of calculating | requiring a reference | standard circular arc in the roof design method which concerns on one Embodiment of this invention. It is a figure which shows the processing content in the process of calculating | requiring a reference | standard circular arc in the roof design method which concerns on one Embodiment of this invention. It is a flowchart which shows the detailed flow of the process of calculating | requiring a reinforcing material arc in the roof design method which concerns on one Embodiment of this invention. It is a figure which shows the processing content in the process of calculating | requiring a reinforcing material arc in the roof design method which concerns on one Embodiment of this invention. It is a flowchart which shows the detailed flow of the process of calculating | requiring a 2nd material circular arc in the roof design method which concerns on one Embodiment of this invention. It is a figure which shows the processing content in the process of calculating | requiring a 2nd material circular arc in the roof design method which concerns on one Embodiment of this invention. It is a figure which shows the processing content in the process of calculating | requiring a 2nd material circular arc in the roof design method which concerns on one Embodiment of this invention. In the roof design method concerning one embodiment of the present invention, it is a flow chart which shows the detailed flow of the process of creating the 1st material. In the roof design method concerning one embodiment of the present invention, it is a figure showing the contents of processing in the process of creating the 1st material. It is a figure which shows the processing content in the process of calculating | requiring the reference | standard arc of a top chord material in the roof design method which concerns on one Embodiment of this invention. It is an enlarged view which shows the principal part of the processing content in the process of calculating | requiring the reference | standard arc of a top chord material in the roof design method which concerns on one Embodiment of this invention. In the roof design method which concerns on one Embodiment of this invention, it is a figure which shows the processing content in the process of calculating | requiring the reinforcing material circular arc of an upper chord material. It is a figure which shows the processing content in the process of calculating | requiring the 2nd material circular arc of a top chord material in the roof design method which concerns on one Embodiment of this invention. FIG. 20 is a diagram illustrating a state following FIG. 19 in the step of obtaining the second material arc of the upper chord material in the roof design method according to the embodiment of the present invention. In the roof design method which concerns on one Embodiment of this invention, it is a figure which shows the processing content in the process of creating the 1st material of a top chord material. In the roof design method which concerns on one Embodiment of this invention, it is a figure which shows the processing content in the design process of a diagonal. It is a top view of the roof which constitutes the structure concerning the 1st modification of the present invention. It is a top view of the roof which constitutes the structure concerning the 2nd modification of the present invention. It is a top view of the roof which constitutes the structure concerning the 3rd modification of the present invention. It is a top view of the roof which constitutes the structure concerning the 4th modification of the present invention. It is a top view of the roof which constitutes the structure concerning the 5th modification of the present invention. It is a top view of the roof which constitutes the structure concerning the 6th modification of the present invention. It is a figure which shows the processing content in the process of calculating | requiring a 2nd material circular arc in the roof design method which concerns on the modification of this invention.

  Hereinafter, with reference to FIG. 1 to FIG. 23, a roof 11 and a method for designing the roof 11 according to an embodiment of the present invention will be described.

(roof)
As shown in FIGS. 1 to 4, the structure 10 includes a roof 11, a lower structure 12 that supports the roof 11, and a roller support 13 that is disposed between the roof 11 and the lower structure 12. Yes.
The roof 11 is formed in a rectangular shape in plan view as viewed from the up-down direction Dz. Hereinafter, the longitudinal direction of the rectangle is referred to as a digit direction Dx (first direction), and the short direction is referred to as a span direction Dy (second direction).

  The roof 11 is formed by a truss structure. In the present embodiment, the roof 11 is formed by a three-dimensional truss structure. In the illustrated example, the roof 11 has a double layer structure (multi-layer structure) having a plurality of upper chord members 21, a plurality of lower chord members 31, and a plurality of diagonal members 41. Hereinafter, an assembly of a plurality of upper chord members 21 is referred to as an upper chord member 20, and an assembly of a plurality of lower chord members 31 is referred to as a lower chord member 30.

  The upper chord body 20 and the lower chord body 30 are each formed in a planar shape. In other words, the plurality of upper chord members 21 and the plurality of lower chord members 31 (plural string members) are arranged on the same plane. The plurality of upper chord members 21 and the plurality of lower chord members 31 are arranged on the same spherical surface that protrudes upward. In other words, the roof 11 is provided with a rise. The rise is provided, for example, in order to satisfy the internal effective height, water gradient, and the like according to the design and the legal conditions.

The upper chord body 20 includes a plurality of upper chord members 21, an outer peripheral member 51, a first member 52, a second member 53, and a reinforcing member 54. The outer peripheral material 51 is formed in a linear shape. The 1st material 52, the 2nd material 53, and the reinforcing material 54 are formed in the circular arc shape which becomes convex upwards.
The outer peripheral material 51 is formed in an annular shape in plan view. The outer peripheral member 51 is formed in a polygonal shape having a plurality of side portions 55 and a plurality of corner portions 56 in plan view. In the illustrated example, the outer peripheral member 51 is formed in a rectangular shape in plan view. The plurality of side portions 55 include two first side portions 55a extending in the column direction Dx and two second side portions 55b extending in the span direction Dy.

The first material 52 extends in the column direction Dx in plan view. The first material 52 is parallel to the first side 55a in plan view. The first material 52 is stretched over the outer peripheral material 51. A plurality of the first materials 52 are arranged at intervals in the spanning direction Dy.
The second material 53 extends in the spanning direction Dy in plan view. The second material 53 is parallel to the second side 55b in plan view. The second material 53 is stretched over the outer peripheral material 51 while intersecting the first material 52. A plurality of second materials 53 are arranged at intervals in the column direction Dx.

  As shown in FIG. 1, the reinforcing member 54 extends in a direction that intersects the crossing direction Dx and the spanning direction Dy in plan view. The reinforcing material 54 is stretched over the outer peripheral material 51 while intersecting the first material 52 and the second material 53. The reinforcing material 54 divides the first material 52 and the first side portion 55a in the direction of the line Dx. The reinforcing material 54 divides the second material 53 and the second side portion 55b in the spanning direction Dy. In the outer peripheral member 51, the reinforcing member 54 is bridged between two side portions 55 (one between the first side portion 55a and the second side portion 55b) that are adjacent to each other with one corner portion 56 interposed therebetween.

  In the present embodiment, the reinforcing material 54 is provided for all sets of two side portions 55 that are adjacent to each other with one corner portion 56 interposed therebetween. As a result, the reinforcing member 54 (tension ring) is formed in a polygonal shape inscribed in the outer peripheral member 51 in plan view. The reinforcing member 54 includes two first corners 57 that are convex in the column direction Dx and two second corners 58 that are convex in the spanning direction Dy in plan view. In the second corner portion 58, two side portions 59 forming the second corner portion 58 are separated in the column direction Dx. Thus, in the 2nd corner | angular part 58, the side parts 59 do not need to actually cross | intersect, but should just form the 2nd corner | angular part 58 substantially. The interval between the side portions 59 can be adjusted by the scale of the structure 10 (building), the member configuration of the roof 11 and the configuration of the members between the side portions 59.

As shown in FIG. 2, the reinforcing member 54 includes a main rigid body 60 (rigid body) and a sub-rigid body 61. The main rigid body 60 is formed in a circular arc shape that protrudes upward.
The main rigid body 60 is continuously stretched between two different points on the outer peripheral member 51. The main rigid body 60 is formed in an arc shape in which an intermediate portion 60c is convex upward with respect to both end portions 60a and 60b joined to the outer peripheral member 51. The main rigid body 60 is provided linearly in plan view between two different points on the outer circumferential member 51. That is, when the main rigid body 60 is seen in a plan view, both end portions 60a and 60b and the intermediate portion 60c are arranged on a straight line. A plurality (three in the illustrated example) of main rigid bodies 60 are provided at intervals on each side portion 59. Note that the main rigid body 60 is continuously spanned between two different points on the outer peripheral member 51, that one continuous main rigid body 60 is spanned between two different points on the outer peripheral member 51. Means. The single continuous main rigid body 60 includes a configuration in which a plurality of rigid bodies are integrated through welding. For example, as one continuous main rigid body 60, it is possible to adopt a shape steel in which one is continuously extruded, and a plurality of separately extruded shape steels are connected via welding. It is also possible to adopt a shape steel joined together.

  The sub-rigid body 61 connects adjacent main rigid bodies 60 to each other. The secondary rigid body 61 includes a first rigid body 62 and a second rigid body 63. The first rigid body 62 extends in the column direction Dx. The first rigid body 62 is bridged between the first material 52 and the first side portion 55a where the reinforcing material 54 is divided. The second rigid body 63 extends in the spanning direction Dy. The second rigid body 63 is bridged between the second material 53 and the second side 55b where the reinforcing material 54 is divided.

  As shown in FIG. 4, each of the outer peripheral member 51, the first member 52, and the second member 53 includes a plurality of truss members and a joint member that connects adjacent truss members. The truss member is formed of, for example, a steel pipe (for example, φ88.9 to φ267). The joint member is formed in a spherical shape, for example. The outer peripheral member 51, the first member 52, and the second member 53 intersect at the joint member.

The reinforcing member 54 is made of, for example, a section steel (for example, an H-section steel, H350 wide). The reinforcing material 54 is formed, for example, by welding a plurality of shape steels. The axial rigidity of the reinforcing material 54 is higher than the axial rigidity of the outer peripheral material 51, the first material 52, and the second material 53. The compressive strength of the reinforcing material 54 (compressed strength of the shape steel) is higher than the compressive strength of the outer peripheral material 51, the first material 52 and the second material 53 (compressive strength of the steel pipe). The tensile strength of the reinforcing material 54 (tensile strength of the shape steel) is higher than the tensile strength of the outer peripheral material 51, the first material 52, and the second material 53 (tensile strength of the steel pipe).
The outer peripheral member 51, the first member 52, and the second member 53 are rigidly joined to the reinforcing member 54 by, for example, welding or high strength bolts. The form of joining is not limited to rigid joining, and may be semi-rigid joining or pin joining.

As shown in FIGS. 1 to 4, the lower chord body 30, like the upper chord body 20, includes a plurality of upper chord members 21, an outer peripheral member 51, a first member 52, a second member 53, and a reinforcing member 54. It is equipped with.
As shown in FIG. 1 and FIG. 2, the first material 52 of the lower chord body 30 is one more than the first material 52 of the upper chord body 20, and is a half span and a tension between the first material 52 of the upper chord body 20. It is shifted in the direction Dy. The second material 53 of the lower chord body 30 is one more than the second material 53 of the upper chord body 20 and is shifted from the second material 53 of the upper chord body 20 by a half span and in the column direction Dx.

The outer circumferential member 51 of the lower chord body 30 is larger than the outer circumferential member 51 of the upper chord body 20 in the crossing direction Dx and the spanning direction Dy. The outer peripheral member 51 of the lower chord body 30 is larger than the outer peripheral member 51 of the upper chord body 20 by one span of the second member 53 in the direction of the line Dx. The outer circumferential member 51 of the lower chord body 30 is larger than the outer circumferential member 51 of the upper chord body 20 by one span of the first material 52 in the spanning direction Dy.
The main rigid body 60 of the lower chord body 30 overlaps the main rigid body 60 of the upper chord body 20 in the vertical direction. The main rigid body 60 of the lower chord member 31 is disposed directly below the main rigid body 60 of the upper chord body 20.

As shown in FIGS. 2 to 4, the diagonal material 41 includes a first diagonal material 42 and a second diagonal material 43.
The first diagonal member 42 connects the outer peripheral member 51, the first member 52, and the second member 53 of the lower chord body 30, and the outer peripheral member 51, the first member 52, and the second member 53 of the upper chord member 20, respectively. At least one end of the diagonal member 41 includes an outer peripheral member 51, a first member 52, and a second member 53 of the lower chord member 30, and an outer peripheral member 51, a first member 52, and a second member 53 of the upper chord member 20. It is connected to one of the joints. The outer peripheral member 51, the first member 52 and the second member 53 of the lower chord member 30, the outer peripheral member 51, the first member 52 and the second member 53 of the upper chord member 20, and the first diagonal member 42 constitute a three-dimensional truss. is doing.

  The second diagonal member 43 connects the upper and lower main rigid bodies 60 to each other. The second diagonal member 43 is located immediately below the main rigid body 60 of the upper chord body 20 and directly above the main rigid body 60 of the lower chord body 30. The main rigid body 60 of the upper chord body 20, the main rigid body 60 of the lower chord body 30, and the second diagonal member 43 connecting both the main rigid bodies 60 form a planar truss located in the vertical plane.

As shown in FIGS. 1 to 3, the roof 11 further includes a secondary member 71. The secondary member 71 is a member for receiving (supporting) an outer wall provided around the roof 11. In other words, the secondary member 71 is not a structural member of the roof 11. The secondary member 71 is formed in an annular shape on the outer periphery of the roof 11. The secondary member 71 has a truss structure. The secondary member 71 is made of, for example, a shape steel.
As shown in FIG. 3, the lower structure 12 includes a plurality of pillars 12a. The roller support 13 is disposed between the column 12 a and the outer peripheral member 51 of the lower chord body 30.

Next, a method for designing the roof 11 as described above will be described.
A design device 100 shown in FIG. 5 is a computer device that executes a computer program recorded on a tangible recording medium (not shown) that is not temporary by a CPU (not shown). The design apparatus 100 functionally includes an input receiving unit 101, a storage unit 102, an arithmetic processing unit 103, and a data output unit 104.

  The input receiving unit 101 receives input of various setting values. Various set values are input from an input unit (for example, a keyboard, a mouse, etc.) (not shown) provided in the design apparatus 100. The set values received by the input receiving unit 101 include, for example, (1) positions of a plurality of outer peripheral nodes set at intervals along the outer peripheral member 51 of the lower chord member 31, and (2) the lower chord member 31 and the upper chord member 21. Position coordinates of both ends of the first material 52, the second material 53, and the reinforcing material 54, (3) a first rise D1 of a reference first material 52m described later, a center depth D21 of the upper chord material 21, a peripheral depth D22, and the like There is. The coordinates of various positions can be three-dimensional coordinates based on the column direction Dx, the span direction Dy, and the vertical direction Dz.

The storage unit 102 includes a storage device such as a memory. The storage unit 102 stores various setting values received by the input receiving unit 101, various types calculated by the calculation processing by the calculation processing unit 103, and the like. The arithmetic processing unit 103 calculates the nodes of the first material 52, the second material 53, the reinforcing material 54, and the like by performing arithmetic processing based on the computer program.
The data output unit 104 outputs design data of the upper chord member 21, the lower chord member 31, and the diagonal member 41 of the roof 11 to the outside as a result calculated by the calculation in the calculation processing unit 103.

(Roof design method)
A method for designing the roof 11 executed by the design apparatus 100 will be described.
As shown in FIG. 6, the design method of the roof 11 of this embodiment mainly includes a design process S1 for the lower chord material 31, a design process S2 for the upper chord material 21, and a design process S3 for the diagonal material 41.

[Low chord material design process S1]
First, the design device 100 executes the design process S1 of the lower chord material 31. The design process S1 of the lower chord material 31 includes the following processes S11 to S15 as shown in FIG.

<Step S11 for Accepting Input of Set Value>
In the design process S1 of the lower chord material 31, first, a preset input necessary for designing the lower chord material 31 is received.
The operator can position (position coordinates) of the outer peripheral material 51 of the lower chord material 31 and positions (position coordinates) of the first material 52, the second material 53, and the reinforcing material 54 of the lower chord material 31 at both ends. Enter.

  Further, the worker is a first rise which is a rise in a first material 52 (hereinafter referred to as a reference first material 52m) located in the center of the spanning direction Dy among the first materials 52 of the lower chord material 31. Set D1. Here, “rise” refers to an upward projecting dimension (in the vertical direction Dz) of the intermediate portion that is convex upward with respect to the projection line connecting both ends of the first material 52, the second material 53, and the reinforcing material 54. Size, see D1 in FIG. For the first rise D1 of the reference first material 52m, for example, 4500 mm is set as an initial value. The operator can change and input the first rise D1 as necessary. The input receiving unit 101 causes the storage unit 102 to store the input position coordinates of the nodes at both ends of each member, the first rise D1, and the like.

<Step S12 for obtaining a reference arc>
When step S11 is completed, the arithmetic processing unit 103 of the design apparatus 100 executes step S12 for obtaining a reference arc. Specifically, the step S12 for obtaining the reference arc includes the following steps S121 to S124 as shown in FIG.

  First, as shown in FIG. 8 and FIG. 9, the arithmetic processing unit 103 determines the peripheral material 51 of the lower chord material 31 from the position coordinates of the outer peripheral material 51 of the lower chord material 31 stored in the storage unit 102 in step S <b> 11. A projection plane F1 that is a plane to be obtained is obtained (step S121). In addition, the arithmetic processing unit 103 retrieves the value of the first rise D1 that is the rise of the reference first material 52m from the storage unit 102 (step S122).

Next, the arithmetic processing unit 103 calls the position coordinates of the nodes Y1 and Y2 at both ends of the reference first material 52m from the storage unit 102. The nodes Y1 and Y2 are the midpoints of the spanning direction Dy of the outer peripheral members 51X1 and 51X2 (second side portions 55b) located at both ends of the lower chord member 31 in the row direction Dx. Processing unit 103 obtains a first projection line _Y l 12 connecting the nodes Y1, Y2 (step S123). The first projection line Y _l 12 is obtained by projecting the reference arc Y, which is an arc forming the reference first material 52m of the lower chord material 31, onto the projection plane F1.

Further, the arithmetic processing unit 103 creates a node Y3 to be the midpoint of the first projection line _Y l 12. Subsequently, the arithmetic processing unit 103 creates a node Y4 obtained by moving the node Y3 by the value (dimension) of the first rise D1 above the vertical direction Dz. Subsequently, the arithmetic processing unit 103 calculates an arc having the above points Y1, Y4, Y2 as three points on the arc by calculation, and this arc is set as a reference arc Y indicating the shape of the reference first material 52m ( Step S124). In this way, the reference arc Y is obtained in step S12.

<Step S13 for obtaining a reinforcing material arc>
As shown in FIG. 7, when the step S12 is completed, the arithmetic processing unit 103 of the design apparatus 100 executes a step S13 for obtaining a reinforcing material arc. The reinforcing material arc is an arc for forming the reinforcing material 54 (the main rigid body 60). In detail, the step S13 for obtaining the reinforcing material arc includes the following steps S131 to S136 as shown in FIG.

First, as shown in FIGS. 10 and 11, the arithmetic processing unit 103 calls the position coordinates of the nodes a1 and a2 at both ends of the reinforcing material 54 (main rigid body 60) from the storage unit 102, and connects the nodes a1 and a2. Three projection lines a _l 12 are obtained (step S131). The third projection line a _l 12 is obtained by projecting the reinforcing material arc a which is an arc forming the reinforcing material 54 of the lower chord material 31 onto the projection plane F1.

Further, the arithmetic processing unit 103 creates a node a3 to be the midpoint of the third projection line _a l 12. Subsequently, the arithmetic processing unit 103 creates a second projection line a _l 345 that passes through the node a3 and extends in the spanning direction Dy (step S132). The second projection line a _l 345 intersects (orthogonally) the first projection line Y _l 12 and extends in the spanning direction Dy, and has nodes a4 and a5 at both ends on the periphery of the projection plane F1. The second projection line a _l 345 is obtained by projecting the auxiliary arc a _arc 485 onto the projection plane F1. Sub arc _a arc 485 passes through the reference arc Y extend in Harima direction Dy, the edges on the periphery of the projection plane F1 (a4, a5) is an arc located.

The arithmetic processing unit 103 obtains the value of the second rise D2 after obtaining the second projection line a _l 345 and the third projection line a _l 12 in steps S131 and S132 (step S133 (second step)). . The second rise D2 is a rise of the auxiliary arc a _arc 485. In other words, the second rise D2 is a rise in the reference arc Y Ueno point located above the intersection of the first projection line Y _l 12 and the second projection line a _l 345. At this time, first, a node a7 that is an intersection of the first projection line Y _l 12 and the second projection line a _l 345 is created on the projection plane F1. Next, a node a8 is created at the intersection of the perpendicular from the node a7 and the reference arc Y. The distance between the nodes a7 and a8 is the second rise D2.

Subsequently, the arithmetic processing unit 103 calculates an auxiliary arc a _arc 485 by calculation based on the second rise D2 and the second projection line a _l 345 (step S134 (third step)). For this purpose, an auxiliary arc a _arc 485 is created with the nodes a4, a8, a5 as three points on the _arc .

Next, the arithmetic processing unit 103 obtains a third rise D3 (step S135 (fourth step)). The third rise D3 is a rise of the reinforcing material arc a. In other words, the third rise D3 is a rise at the node a9 on the auxiliary arc a _arc 485. The node a9 is a node located vertically above the node a3 that is the intersection of the second projection line a _l 345 and the third projection line a _l 12. For this purpose, a node a9 is created at the intersection of the perpendicular from the node a3 and the arc a _arc 485. The distance between the nodes a3 and a9 is the third rise D3.

Subsequently, the arithmetic processing unit 103 calculates the reinforcing material arc a by calculation based on the third rise D3 and the third projection line a _l 12 (step S136 (fifth step)). For this purpose, a reinforcing material arc a having the nodes a1, a9, a2 as three points on the arc is created.
In this manner, the reinforcing material arc a which is an arc forming the reinforcing material 54 (main rigid body 60) of the lower chord material 31 is obtained in the process S13 through the series of steps S131 to S136. The step S13 is repeated in the same manner for the plurality of reinforcing members 54 (main rigid bodies 60) of the lower chord member 31. The reinforcing material 54 (main rigid body 60) can be formed along the reinforcing material arc a.
In this step, the setting of the auxiliary arc a _arc 485 is not limited to the above method. For example, the auxiliary arc a _arc 485 may be an arc with an arbitrarily set curvature.

<Step S14 for Finding Second Material Arc>
As shown in FIG. 7, when the step S13 is completed, the arithmetic processing unit 103 executes a step S14 for obtaining a second material arc. The second material arc is an arc for forming the second material 53. In the present embodiment, the method of obtaining the second material arc differs depending on whether or not the second material 53 intersects the reinforcing material 54. That is, as shown in FIG. 12, in the step S14 for obtaining the second material arc, the second material arc Ra relating to the second material 53A that does not intersect with the reinforcing material 54 (shifted in the direction of the direction Dx with respect to the reinforcing material 54). Step S14A for obtaining, and Step S14B for obtaining second material arcs Rb and Rc related to the second material 53B intersecting the reinforcing material 54 are included. In the present embodiment, the second material 53B that intersects the reinforcing material 54 intersects the reinforcing material 54 on both sides in the spanning direction Dy. In other words, the second material 53B does not cross the reinforcing material 54 only on one side in the spanning direction Dy. That is, the second material 53B intersects the reinforcing material 54 at two places instead of one place.

(Process S14A)
The step S14A includes the following steps S141 and S142.
As illustrated in FIGS. 12 and 13, the arithmetic processing unit 103 includes a second material arc Ra of the second material 53 </ b> A (see FIG. 1) located between the two first side portions 55 a that are separated in the spanning direction Dy. Create Both ends of the second material 53A are located on the periphery of the projection plane F1. In other words, the second material 53A does not intersect the reinforcing material 54.
Processing unit 103, the position coordinates of the node b1, b2 of the two ends of the second member 53A retrieved from the storage unit 102, obtains the projection line _b l 12 connecting the nodes b1, b2 (step S141). The projection line b _l 12 is obtained by projecting the second material arc Ra, which is an arc forming the second material 53A, onto the projection plane F1.

Further, the arithmetic processing unit 103 creates a node b3 as the intersection of the projection line _b l 12 a first projection line _Y l 12. Subsequently, the arithmetic processing unit 103 creates a node b4 at the intersection of the perpendicular from the node b3 and the reference arc Y. The distance between the nodes b3 and b4 is the rise of the second material 53A. Subsequently, the arithmetic processing unit 103 creates a second material arc Ra having the nodes b1, b4, and b2 as three points on the arc (step S142).

  Through the above step S14A, the second material arc Ra regarding the second material 53A that does not intersect the reinforcing material 54 is obtained. When there are a plurality of second materials 53A, step S14A is performed until the second material arc Ra for all the second materials 53A is obtained.

(Process S14B)
As shown in FIG. 12, the step S14B includes a step S14B1 of obtaining a second material arc related to a portion of the second material 53B located between the reinforcing materials 54 formed symmetrically in the spanning direction Dy, A step S14B2 of obtaining a second material arc related to a portion of the two materials 53B located outside the spanning direction Dy with respect to the reinforcing material 54.

"Process S14B1"
The step S14B1 includes the following steps S143 and S144.
As illustrated in FIG. 13, the arithmetic processing unit 103 obtains the position coordinates of the nodes b1a ′ and b2a ′ at both ends of the second material 53B joined at both ends to the reinforcing material 54 (step S143). In other words, the second material 53B intersects the reinforcing material 54.
For this purpose, the arithmetic processing unit 103 obtains nodes b1a and b2a that are intersections between the projection line b ₁ 1a2a of the second material 53b and the third projection line a ₁ 12 that is the projection line of the reinforcing material 54. The projection line b _l 1a2a of the second material 53b is obtained by the arithmetic processing unit 103 based on the position of the outer peripheral node stored in the storage unit 102, for example. Subsequently, the arithmetic processing unit 103 obtains intersections between the perpendiculars from the nodes b1a and b2a and the reinforcing material arc a as nodes b1a ′ and b2a ′ at both ends of the second material 53B.

Further, the arithmetic processing unit 103 creates a node b3a comprising a first projection line _Y l 12 and the intersection of the projection line _b l _1a2a. Subsequently, the arithmetic processing unit 103 creates a node b4a at the intersection of the perpendicular from the node b3a and the reference arc Y. The distance between the nodes b3a and b4a is the rise of the second material 53B. Subsequently, the arithmetic processing unit 103 creates a second material arc Rb having the nodes b1a, b4a, b2a as three points on the arc (step S144).
Through the above-described step S14B1, the second material arc Rb relating to the portion of the second material 53B located between the reinforcing materials 54 formed symmetrically in the spanning direction Dy is obtained.

"Process S14B2"
As shown in FIG. 12, the step S14B2 includes the following steps S145 and S146.
As illustrated in FIG. 14, the arithmetic processing unit 103 includes a node b5a that is an intersection of the portion of the second material 53B that is located outside the reinforcing material 54 in the spanning direction Dy and the outer peripheral material 51. Obtain (step S145). Processing unit 103 can obtain the node b5a, as the intersection of the projection line _b l _1a2a and the outer member 51. Then, the arithmetic processing unit 103 creates a second material arc Rc having the nodes b5a, b4a, b2a ′ as three points on the arc (step S146). The second material arc Rc passes through the outer peripheral material 51, the reference first material 52m (reference arc Y), and the reinforcing material 54 (reinforcing material arc a).

  Through the above-described step S14B2, the second material arc Rc related to the portion of the second material 53B located outside the reinforcing material 54 in the spanning direction Dy is obtained. In the illustrated example, portions of the second material 53B that are located on the outer side in the spanning direction Dy with respect to the reinforcing material 54 are on both sides with the reference arc Y interposed therebetween. In other words, there are two portions of the second material 53B that are located on the outer side in the spanning direction Dy with respect to the reinforcing material 54 for one second material 53B. Therefore, in step S14B2, two second material arcs Rc are obtained for one second material 53B.

  Through the above-described step S14B (step S14B1, step S14B2), the second material arcs Rb and Rc related to the second material 53B intersecting the reinforcing material 54 are obtained. When there are a plurality of second materials 53B, step S14B is performed until the second material arcs Rb and Rc for all the second materials 53B are obtained.

The step S14 is repeated until the arcs Ra, Rb, Rc for all the second members 53 of the plurality of lower chord members 31 are obtained.
Each node in the second material 53 (53A, 53B) of the lower chord material 31 formed by the second material arcs Ra, Rb, Rc created in this way is the same arc (second material arc Ra, Rb, Rc). ) Located on top. Each node (node e ′ described later) on the same arc including these nodes serves as the joint member, and a line segment connecting the nodes serves as the truss member. In this step S <b> 14, the sub-rigid body 61 of the reinforcing material 54 may be designed as a part of the second material 53.

<Step S15 of creating the first material>
As shown in FIG. 7, when step S <b> 14 is completed, the arithmetic processing unit 103 executes step S <b> 15 for creating the first material. Specifically, the process S15 for creating the first material includes the following processes S151 to S153 as shown in FIG.

First, the arithmetic processing unit 103 obtains a node e as shown in FIGS. 13 and 15 (step S151). Node e is the projection line of the second member 53 extending in Harima direction Dy (e.g., or projection line _b l 12 second projection line _a l 345) and the projection line of the first member 52 extending in the Longitudinal direction Dx (e.g., a first projection line _Y l 12 and projection line e12) and the intersection of the. The projection lines of the second members 53 and the projection lines of the first members 52 form a lattice shape as a whole on the projection plane F1.
Subsequently, the arithmetic processing unit 103 obtains the intersection of the perpendicular from each node e and each second material arc Ra, Rb as the node e ′ of the first material 52 (step S152).
Further, as shown in FIG. 16, the arithmetic processing unit 103 creates a line segment Re of the first material 52 by connecting a plurality of nodes e ′ created at intervals along the column direction Dx. (Step S152). The node e ′ becomes the joint member, and the line segment Re connecting the nodes e ′ becomes the truss member. In this step S15, the sub-rigid body 61 of the reinforcing material 54 may be designed as a part of the first material 52.
The step S15 is repeated in the same manner for the first material 52 of the plurality of lower chord members 31.

  In this way, the design process S1 of the reference first material 52m, the reinforcing material 54, the second material 53, and the first material 52 of the lower chord material 31 is completed.

[Upstring material design process S2]
Next, the design device 100 executes the design process S2 of the upper chord material 21. The design process S2 of the upper chord material 21 includes the following processes S21 to S25 as shown in FIG. In the description of the design process S2 of the upper chord material 21, the description common to the design process S1 of the lower chord material 31 may be omitted. Further, the secondary member 71 may be a part of the upper chord material 21 in performing the design step S2 of the upper chord material 21.

<Step S21 for Accepting Input of Set Value>
In the design process S2 of the upper chord material 21, first, prior input of setting values necessary for designing the upper chord material 21 is accepted.
As shown in FIG. 17, the worker inputs the value of the central depth D21 and the value of the peripheral depth D22. Here, the depth is a dimension indicating the height position of the upper chord member 21 in the vertical direction Dz with respect to the lower chord member 31. The center depth D21 is the dimension of the difference in height between the center portion of the reference first material 52m of the upper chord material 21 and the center portion of the reference first material 52m of the lower chord material 31. The peripheral depth D22 is a dimension of a difference in height between both ends of the reference first material 52m of the upper chord material 21 with respect to both ends of the reference first material 52m of the lower chord material 31. The center depth D21 is set to 3700 mm, for example, as an initial value. For the peripheral depth D22, for example, 2000 mm is set as an initial value. The operator can change and input the values of the central depth D21 and the peripheral depth D22 as necessary. The input receiving unit 101 causes the storage unit 102 to store the input value of the central depth D21 and the value of the peripheral depth D22. The peripheral depth D22 may not be a depth parallel to the vertical direction Dz. As in the example shown in FIG. 18, when the reference first material 52m of the upper chord material 21 is longer than the reference first material 52m of the lower chord material 31 in the transverse direction Dx, the peripheral depth D22 is inclined with respect to the vertical direction Dz. It becomes depth.

<Step S22 for obtaining a reference arc>
When step S21 is completed, the arithmetic processing unit 103 of the design apparatus 100 executes step S22 for obtaining a reference arc.
First, as shown in FIG. 17, the arithmetic processing unit 103 sets a node Y4 serving as a vertex of the reference arc Y indicating the shape of the reference first material 52m of the lower chord material 31 (a center portion in the column direction Dx) as a center depth D21. The node Y7 is created by moving upward by the value of. Further, as shown in FIG. 18, the arithmetic processing unit 103, a node Y1, Y2 of the two ends of the first projection line _Y l 12, respectively, by an amount corresponding to the peripheral depth D22, is moved upward, the node Y5, Y6 is created. The arithmetic processing unit 103 calculates an arc having the above points Y5, Y7, and Y6 as three points on the arc by calculation, and uses the arc as a reference arc Yu indicating the shape of the reference first material 52m of the upper chord material 21. . The reference arc Y for the lower chord material 31 and the reference arc Yu for the upper chord material 21 both have a common first projection line Y _l 12.

<Step S23 for obtaining a reinforcing material arc>
As shown in FIG. 7, when step S22 is completed, the arithmetic processing unit 103 of the design apparatus 100 executes step S23 for obtaining a reinforcing material arc.
First, as illustrated in FIG. 19, the arithmetic processing unit 103 extends the nodes a1 and a2 at both ends of the reinforcing material arc a to the positions of the outer walls, thereby creating nodes a10 and a11. The extension of the nodes a1 and a2 at both ends of the reinforcing material arc a to the position of the outer wall means that, for example, the nodes a1 and a2 at both ends of the reinforcing material arc a are connected to the outer peripheral member 51 (secondary This means extending to a position overlapping with the outermost part of the member 71). Next, the arithmetic processing unit 103 moves the nodes a10 and a11 upward in the vertical direction Dz by an amount corresponding to the peripheral depth D22 to create the nodes a10 ′ and a11 ′. In addition, the arithmetic processing unit 103 creates a projection line a _l 1011 connecting the created nodes a10 and a11. Next, the arithmetic processing unit 103 creates a node a12 that is the midpoint of the projection line a _l 1011.

Further, the arithmetic processing unit 103 creates a projection line a _l 131214 that passes through the node a12 and extends in the spanning direction Dy. The projection line a _l 131214 extends in the spanning direction Dy through the first projection line Y _l 12, and has nodes a13 and a14 at both ends on the periphery of the projection plane F1. Next, the arithmetic processing unit 103 moves the nodes a13 and a14 upward in the vertical direction Dz by an amount corresponding to the peripheral depth D22, and creates nodes a13 ′ and a14 ′.

The arithmetic processing unit 103 creates a node a15 that is an intersection of the projection line a _l 131214 and the first projection line Y _l 12 on the projection plane F1. Further, the arithmetic processing unit 103 creates a node a15 ′ at the intersection of the perpendicular from the node a15 and the reference arc Yu. Next, the arithmetic processing unit 103 creates an arc a _arc a13′15′14 ′ having three nodes a13 ′, a15 ′, and a14 ′. Subsequently, a node a12 ′ is created at the intersection of the perpendicular from the node a12 and the arc a _arc a13′15′14 ′. The arithmetic processing unit 103 creates a reinforcing material arc au having these nodes a10 ′, a12 ′, a11 ′ as three points on the arc.
Step S23 is repeated in the same manner for the plurality of reinforcing members 54 (main rigid bodies 60) of the upper chord member 21. The reinforcing material 54 (main rigid body 60) can be formed along the reinforcing material arc au.

<Step S24 for Finding the Second Material Arc>
As shown in FIG. 7, when the step S23 is completed, the arithmetic processing unit 103 executes a step S24 for obtaining a second material arc.

First, as shown in FIG. 20, the arithmetic processing unit 103 intersects the reference arc Y of the reference first material 52 m of the lower chord material 31 with the arcs Ra and Rb that become the second materials 53 of the lower chord material 31. The node e ′) is created. Subsequently, the arithmetic processing unit 103 creates a midpoint Lm of the line segment Lf that connects the intersections f adjacent to each other in the column direction Dx.
Next, the arithmetic processing unit 103 creates an intersection node c1 where the normal from the midpoint Lm intersects the reference arc Yu.

As illustrated in FIG. 21, the arithmetic processing unit 103 creates a line segment N that extends in the span direction Dy through the vertical lower position of the intersection node c1 on the projection plane F1. Further, on the projection plane F1, the intersection of the line segment N and the position of the outer wall (a position overlapping the outer peripheral member 51 of the upper chord member 21 (which may be the outermost peripheral portion of the secondary member 71) in plan view). Are created as nodes c2 and c3. The arithmetic processing unit 103 creates a second material arc _arc 213 having these nodes c2, c1, and c3 as three points on the _arc .

<Step S25 of creating the first material>
As shown in FIG. 7, when the step S24 is completed, the arithmetic processing unit 103 executes a step S25 for creating the first material. In step S <b> 25, the arithmetic processing unit 103 creates the same as the first material 52 of the lower chord material 31. That is, in the second material arc _arc 213, a node e ′ that is an intersection with the first material 52 is obtained, and in each second material arc _arc 213, the node e ′ having the same position coordinate in the span direction Dy is obtained. The line is connected by a line segment Re. The node e ′ is a joint member, and the line segment Re is a truss member. Similarly, when the second material 53 connects the nodes e ′ in the same second material arc _arc 213 with a line segment, the node e ′ becomes a joint member, and the line segment becomes a truss member.
Note that, as shown in FIG. 22, the first material 52 (one portion surrounded by a dotted line in FIG. 23) having one end bonded to the reinforcing material 54 is linearly connected to the reinforcing material 54. .
2).
The step S25 is repeated in the same manner for the first materials 52 of the plurality of upper chord members 21.

  In this way, the design process S2 of the reference first material 52m, the reinforcing material 54, the second material 53, and the first material 52 of the upper chord material 21 is completed.

[Diagonal material design process S3]
Next, the design apparatus 100 executes the design process S3 of the diagonal member 41. As shown in FIG. 23, the first reference material 52m, the reinforcing material 54, the second material 53, and the first material 52 of the upper chord material 21, and the first reference material 52m, the reinforcing material 54, and the second material of the lower chord material 31. 53 and the first material 52 are joined by the diagonal material 41 to create a three-dimensional truss quadrangular pyramid. As for the reinforcing material 54, the main rigid body 60 having a planar truss structure is created by connecting the reinforcing material 54 of the upper chord material 21 and the reinforcing material 54 of the lower chord material 31 with an oblique material 41 extending in a vertical plane. .
As described above, the design method for the roof 11 in the present embodiment is completed. Note that various members for which no design method is mentioned in the above method can be designed by a known design method. Furthermore, a part or all of the design method of the roof 11 is not limited to the above method. In other words, as a part or all of the design method of the roof 11, a known design method may be adopted instead of the above design method.

By the way, for example, when a rise is provided on the roof 11 for the purpose of satisfying design requirements (such as an effective height of the indoor space under the roof 11) and legal conditions (such as a water gradient), the first material 52 and the first material 52 A thrust force corresponding to the rise is generated in each of the two materials 53. When this thrust force is borne by the lower structure 12 that supports the roof 11, the first material 52 and the second material 53 are pin-bonded to the lower structure 12, for example, and the arches of the first material 52 and the second material 53, respectively. The thrust force is borne by the lower structure 12 using the effect.
For example, when the distance in the cross direction Dx and the distance in the span direction Dy in the outer peripheral member 51 are large (in the case of a so-called large span structure), the thrust force described above becomes large. In this case, when the thrust force is borne by the lower structure 12, it is necessary to increase the strength of the lower structure 12. As a result, for example, the pillars of the pillars 12a in the lower structure 12 become large, and the indoor space under the roof 11 becomes narrow (if the size of the pillars 12a is restricted due to the design plan, the problem cannot be observed). Occurs.
Therefore, a structure that reduces the burden on the lower structure 12 due to the thrust force generated in the first material 52 and the second material 53 is desired.

  As described above, according to the roof 11 according to the present embodiment, the reinforcing material 54 extends in a direction intersecting the beam running direction Dx and the spanning direction Dy in plan view, and the first material 52 and the second material. Crossing 53, the outer peripheral material 51 is stretched over. Therefore, the thrust force generated in the first material 52 and the second material 53 can be transmitted to the reinforcing material 54, and at least a part of these thrust forces can be borne by the reinforcing material 54. In other words, the bending moment can be converted into an axial force, and this axial force can be balanced within the roof 11 (self). Thereby, for example, the thrust force and horizontal displacement of the first material 52 and the second material 53 borne by the lower structure 12 can be suppressed, and the degree of freedom in designing the lower structure 12 can be increased. Further, for example, it becomes possible to expect an arch effect due to the reinforcing material 54, and it is possible to reduce the cost of the roof 11 by eliminating the excessive strength of the truss members applied to the outer peripheral material 51, the first material 52, and the second material 53. Can be realized.

  Furthermore, according to the roof 11 according to the present embodiment, the reinforcing material 54 is formed by the main rigid body 60 that is continuously extended and forms a circular arc in a straight line in plan view. That is, the main rigid body 60 forming the reinforcing member 54 is curved in a plan view while being curved so that the intermediate portion is convex upward with respect to both ends. Thereby, the main rigid body 60 is formed along a plane including both the directions connecting both ends and the vertical direction Dz, and has a two-dimensionally curved shape. Therefore, it is not necessary to curve the main rigid body 60 three-dimensionally, and the design and processing can be performed more easily.

  Further, each node in the portion of the second material 53 of the lower chord member 31 located between the reinforcing members 54 has the reference first material 52m of the lower chord member 31 and the reinforcing member 54 of the lower chord member 31 in the spanning direction Dy. It is located on the same arc (second material arc Rb) to be connected. Furthermore, each node in the part located in the outer side of the spanning direction Dy with respect to the reinforcing material 54 in the second material 53 is also located on the same arc. Therefore, among the second material 53 of the lower chord material 31, the second material 53B intersecting with the reinforcing material 54 has an arc shape curved with a constant curvature, and can be easily designed and processed.

  Nodes b1, b4, b2 in the second material 53A of the lower chord material 31 that do not intersect with the reinforcing material 54 are the same arc (second material arc) that connects the reference first material 52m and the outer peripheral material 51 of the lower chord material 31 in the spanning direction Dy. Ra). Therefore, the second material 53 of the lower chord material 31 that does not intersect with the reinforcing material 54 has an arc shape curved with a certain curvature, and can be easily designed and processed.

  The first material 52 of the lower chord material 31 is formed by a plurality of truss members that form an arc by being connected via a node e (joint member), and the node e in the first material 52 is a node in the second material 53. Doubles as Thereby, the joint member in the first material 52 also serves as the joint member in the second material 53. Therefore, the first material 52 and the second material 53 intersect at the same joint member. For this reason, the first material 52 and the second material 53 can be easily designed.

The design method of the roof 11 according to the main character form includes steps S12 and S13 for obtaining a reinforcing material arc a which is an arc forming the reinforcing material 54 of the lower chord material 31. In steps S12 and S13, a projection surface F1 that is a plane having the outer peripheral member 51 of the lower chord member 31 as a peripheral edge, a first rise D1 that is a rise of a reference first member 52m that is one of the first members 52, and a lower chord a first projection line Y _l 12 obtained by projecting the reference arc Y is an arc on the projection surface F1 to form the reference first member 52m of the timber 31, extending in Harima direction Dy through the reference arc Y, projection surface A second projection line a _l 345 obtained by projecting an auxiliary arc a _arc 485, which is an arc whose edge is located on the periphery of F1, on the projection plane F1, and a third projection obtained by projecting the reinforcing material arc a on the projection plane F1. Line a _l 12 is determined in advance. Step S12, S13 is a second process S12 to determine a reference arc Y based on the first rise D1 and a first projection line _Y l 12 (first step), first projection line _Y l 12 and the second projection line _{a l} Based on step S133 (second step) for obtaining a second rise D2 which is a rise at a point on the reference arc Y located above the intersection with 345, the second rise D2 and the second projection line a _l 345. a third step of obtaining an auxiliary arc _a arc 485, a third rise which is rise in the auxiliary arc _a arc 485 Ueno point located above the intersection of the second projection line _a l 345 and the third projection line _a l 12 comprises the step determining the D3 S135 (fourth step), and a fifth step of obtaining a reinforcing member arc a based on the third rise D3 and a third projection line _a l 12.
According to such a configuration, the arc shape of the reinforcing member 54 can be easily determined.

  The technical scope of the present invention is not limited to the above embodiment, and various modifications can be made without departing from the spirit of the present invention.

The upper chord body 20 and the lower chord body 30 of the roof 11 are not limited to the configuration shown in the embodiment.
For example, each side 55 of the reinforcing material 54 may not include a plurality of main rigid bodies 60 but may include only one main rigid body 60.
In the second corner portion 58 of the reinforcing member 54, the two side portions 59 forming the second corner portion 58 are separated from each other in the row direction Dx, but the two side portions 59 are separated from each other in the row direction Dx. It does not have to be.

As in the roof 11 </ b> A according to the first modification shown in FIG. 24, the outer circumferential member 51 may be square instead of rectangular.
As in the roofs 11B, 11C, 11D, and 11E according to the second to fifth modifications shown in FIGS. 25 to 29, the outer peripheral member 51 has a hexagonal shape, an octagonal shape, a perfect circular shape, and an elliptical shape in plan view. It may be.
As in the roof 11F according to the sixth modification shown in FIG. 29, the reinforcing material 54 may be formed in a triangular shape in plan view.

In the said embodiment, although the 2nd material 53B cross | intersects the reinforcement material 54 in the both sides of the span direction Dy (at 2 places), this invention is not limited to this.
For example, like the roof 11G according to the modification shown in FIG. 30, the second material 53C may intersect the reinforcing material 54 only on one side (only in one place) in the spanning direction Dy. In the illustrated example, the reinforcing material 54 is asymmetric in the spanning direction Dy with respect to the reference first material 52m. The second material 53C intersects the reinforcing material 54 only at a portion located on one side (hereinafter referred to as the first side) in the spanning direction Dy with respect to the reference first material 52m.
In this case, each node in the second material 53B can be designed to be positioned on the same arc connecting the outer peripheral material 51, the reference first material 52m, and the reinforcing material 54 in the spanning direction Dy. That is, in step S14 for obtaining the second material arc, in step S14B for obtaining the second material arc Rd, Re for the second material 53C intersecting with the reinforcing material 54, two second material arcs Rd, Re are obtained.
As the second material arc Rd, of the two intersections of the projection line b _l 1a2a and the outer peripheral member 51, the node b5a which is the intersection on the first side in the spanning direction Dy and the node b2a on the reinforcing material arc a And an arc passing through the node b4a on the reference arc Y can be used. The second material arc Rd is an arc that forms a portion of the second material 53C located on the first side with respect to the reinforcing material 54. The second material arc Rd is an arc having both ends of the node b5a (outer peripheral material 51) and the node b4a (reference first material 52m).
As the second member arc Re, one of the two intersections of the projection line _b l _1a2a and the outer member 51, and the node b6a is an intersection of the second side of Harima direction Dy (opposite the first side), An arc passing through the node b4a on the reference arc Y and the node b2a ′ on the reinforcing material arc a can be used. The second material arc Re is an arc that forms a portion of the second material 53C located on the second side with respect to the reinforcing material 54. The second material arc Re is an arc having both ends of the node b6a (outer peripheral material 51) and the node b2a ′ (reinforcing material 54).
As described above, the present invention can be appropriately applied to a truss structure roof having a plurality of lower chord members 31 that form a curved surface that protrudes upward.

  The roof 11 may have a triple layer structure or the like.

In the above-described embodiment, the tangible recording medium storing the computer program for causing the design apparatus 100 to execute the above-described roof design method is mentioned. As this recording medium, a disk-type recording medium such as a magnetic disk, a magneto-optical disk, a CD-ROM or a DVD-ROM, or a storage medium such as a semiconductor memory may be used. The computer program may be distributed to the computer via a communication line, and the computer that has received the distribution may execute the program.
Further, the program may be for realizing a part of the functions described above. Moreover, what can implement | achieve the function mentioned above in combination with the program already recorded on the computer system, and what is called a difference file (difference program) may be sufficient.

  In addition, it is possible to appropriately replace the constituent elements in the embodiment with known constituent elements without departing from the spirit of the present invention, and the above-described modified examples may be appropriately combined.

11 Roof 21 Upper chord material 31 Lower chord material 41 Diagonal material 51 Peripheral material 52 First material 52m Reference first material 53 Second material 54 Reinforcement material 60 Main rigid body (rigid body)
a, au reinforcement arc _a arc 485 auxiliary arc _a l 12 third projection line _a l 345 second projection line D1 first rise Dx Longitudinal direction Dy Harima direction F1 projection surface S12 step (first step)
S13 step S133 step (second step)
Step S134 (third step)
S135 process (4th process)
Step S136 (5th step)
Y, Yu reference arc _Y l 12 first projection line

Claims (9)

A truss structure roof having a plurality of upper chord members and a plurality of lower chord members forming a curved surface that is convex upward;
Each of the plurality of upper chord members and the plurality of lower chord members is
An outer peripheral material formed in an annular shape;
A first material extending in the direction of the beam and spanning the outer peripheral material;
A second material extending in the spanning direction and spanning the outer peripheral material while intersecting the first material;
A reinforcing material that extends in a direction crossing the crossing direction and the spanning direction, and spans the outer peripheral material while crossing the first material and the second material,
The roof of the upper chord member and the lower chord member is formed of a rigid body that extends continuously and forms a circular arc.   2. The roof according to claim 1, wherein nodes of the lower chord material in the second material are located on the same arc.   Of the second material that intersects with the reinforcing material on both sides in the spanning direction, the node in the portion located between the reinforcing materials is the reference first material of the lower chord material and the reinforcement of the lower chord material The roof according to claim 2, which is located on the same arc connecting materials in the spanning direction.   Of the second material that intersects with the reinforcing material on both sides in the spanning direction, the nodal point in a portion located on the outer side in the spanning direction with respect to the reinforcing material is the outer peripheral material of the lower chord material, The roof according to claim 2 or 3, which is located on the same arc connecting the reference first material of the lower chord material and the reinforcing material of the lower chord material in the spanning direction.   The nodes of the second material that intersect with the reinforcing material only on one side in the spanning direction are the outer peripheral material of the lower chord material, the reference first material of the lower chord material, and the reinforcing material of the lower chord material. The roof according to any one of claims 2 to 4, which is located on the same arc connected in the spanning direction.   6. The node of the second material that does not intersect with the reinforcing material is located on the same arc connecting the reference first material of the lower chord material and the outer peripheral material of the lower chord material in the spanning direction. The roof according to any one of the above.   The roof according to any one of claims 2 to 6, wherein the node in the second material also serves as a node in the first material. A method for designing a roof according to any one of claims 1 to 7,
A step of obtaining a reinforcing material arc that is an arc that forms the reinforcing material of the lower chord material;
In the process,
A projection plane that is a plane having the peripheral material of the lower chord material as a peripheral edge;
A first rise that is a rise of a reference first material that is the first material located in the center in the tension direction in the lower chord material;
A first projection line obtained by projecting a reference arc on the projection plane, which is an arc forming the reference first material of the lower chord material;
A second projection line that projects on the projection plane an auxiliary arc that is an arc that passes through the reference arc and extends in the spanning direction and has an edge located on the periphery of the projection plane;
A third projection line obtained by projecting the reinforcing material arc on the projection plane is obtained in advance;
The process includes
A first step of determining the reference arc based on the first rise and the first projection line;
A second step of obtaining a second rise that is a rise at a point on the reference arc located above the intersection of the first projection line and the second projection line;
A third step of determining the auxiliary arc based on the second rise and the second projection line;
A fourth step of obtaining a third rise that is a rise at a point on the auxiliary arc located above an intersection of the second projection line and the third projection line;
And a fifth step of obtaining the reinforcing material arc based on the third rise and the third projection line. An apparatus for designing a roof according to any one of claims 1 to 7,
An arithmetic processing unit for obtaining a reinforcing material arc that is an arc forming the reinforcing material of the lower chord material;
A projection surface that is a plane having the outer peripheral material of the lower chord material as a peripheral edge, and a first rise that is a rise of a reference first material that is the first material located in the center of the lower chord material in the spanning direction; A first projection line obtained by projecting a reference arc, which is an arc that forms the reference first material of the lower chord material, onto the projection surface, and extends in the span direction through the reference arc, and is a peripheral edge of the projection surface A storage unit that stores a second projection line obtained by projecting an auxiliary arc, which is an arc having an edge positioned above, on the projection plane, and a third projection line obtained by projecting the reinforcing material arc on the projection plane. And comprising
The arithmetic processing unit includes:
A first step of determining the reference arc based on the first rise and the first projection line;
A second step of obtaining a second rise that is a rise at a point on the reference arc located above the intersection of the first projection line and the second projection line;
A third step of determining the auxiliary arc based on the second rise and the second projection line;
A fourth step of obtaining a third rise that is a rise at a point on the auxiliary arc located above an intersection of the second projection line and the third projection line;
And a fifth step of obtaining the reinforcing material arc based on the third rise and the third projection line.