JPH03176544A - Tensed chord beam structure using assemble part - Google Patents

Abstract

PURPOSE:To systematise materials to be used by a method in which the beams and bundled parts of a tensed chord structure are made up of assembled parts of small cross section, the beams are connected into an inversed V-shaped form, the bundled part of a diamond-shaped form corresponding to the beams is used, and they are integrated. CONSTITUTION:Beam parts 10 are integrated by combining three elements into a V form and by fixing them by bolt 15 and nuts 16. A bundled part 11 is made up of assembled parts as main parts, the top of the part 11 is provided with the first connecting metal 17, the bottom is provided with the second connecting metal 18, and the both corners are provided with the third connecting metals 19. They are integrally fixed by fitting parts 21. The beam parts 10 are placed on the top of the part 11, and reinforcing bars 28 are set between the metals 19 and a tenser 27 is set on the middle. Since only assembled parts of small cross section are used, the cost can be greatly reduced and the using parts can also by systemised.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a strung beam structure that effectively utilizes laminated wood.

(Prior art and problems to be solved by the invention) The main feature of the tensioned beam structure that has been used in conventional roof structures is that the stress and deformation of the beam are controlled by introducing prestress using tensile materials such as cables. be.

That is, as shown in the example shown in FIG. 12, the stringed beam structure has a beam 2 erected between a pair of body structures 1 and 1 that are erected facing each other at a predetermined interval, and the lower position of the beam 2 is A typical example is one in which the cable 3 is stretched between the pillars 1.1 and the beam 2 and the cable 3 are connected at approximately the center by an auxiliary member 4. Column 1.
1, one side is a pin fulcrum 5 and the other is a roller fulcrum 6, for example.

Therefore, the tension generated in the cable 3 due to the weight of the beam 2 can be borne by the beam 2 itself as an axial force, and since it is a so-called self-anchoring type, an anchor is not required, and furthermore, a predetermined prestress on the cable 3 can be borne by the beam 2 itself. The introduction has advantages such as making it possible to obtain an optimal stress distribution for the beam 2.

On the other hand, various types of buildings have been constructed using laminated timber, but in the case of structures with large spans, the cross-sectional dimensions of the laminated timber are considerably large, resulting in lower cost compared to small cross-section members. There was a problem in that the cost was greater than the increase in the cross section 111.

Therefore, the present invention focuses on the fact that the above-mentioned effects of a stretched string beam structure increase as the fixed load is larger than the added load or as the span becomes larger, and the present invention is to effectively utilize laminated wood and apply it to roof structures, etc. It was proposed for this purpose.

(Means for Solving the Problems) In order to achieve the object described in item 1, in the tensioned beam structure using laminated timber according to the present invention, a beam member and a tensile member disposed below the beam member are assembled into a plurality of bundles. In the stringed beam structure formed by connecting members, the beam member is characterized in that beam elements of relatively small cross section made of laminated wood are connected and integrated in an inverted V shape.

Further, the bundle member has a pantograph shape corresponding to the cross-sectional shape of the beam member, and the beam member is placed and joined to the top of the bundle member, and the bundle member has the top, the bottom, It is preferable that connecting metal fittings are arranged at both left and right corners, and that each end of the laminated wood with a predetermined cross section connecting the connecting metal fittings is fixed with each connecting metal fitting to form an integral structure. .

Furthermore, the beam member may be arranged in a mountain shape with the central portion between the support members as the apex, and the beam member, the rFJ marking member, and the tension member may form a roof string beam. can.

Further, in order to achieve effective utilization, it is desirable that the support member is integrally formed with either or both of the beam member and the bundle member using a bonded metal fitting made of laminated wood having the same cross section.

(Example) Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.

1 to 11 show an example in which the stringed beam structure according to the present invention is applied to a roof structure, and the roof stringed beam structure T according to this embodiment includes a beam member 10, a bundle member 11, It is composed of a first tensile material 30 and a second tensile material 31.

In this embodiment, the pair of beam members 1O11O are arranged in a mountain shape with the apex at the center between the support members 13 and 13 that are erected facing each other with a predetermined span, and are constructed.
The beam member 10.10 and the first tension member 30 and the second tension member 31 disposed below the beam member 10, 10 are connected by a plurality of bundle members 11 to form a roof-clad string beam structure T.

As shown in FIGS. 2 and 4, which are sectional views taken along line AA and line BB in FIG. In the example, 1
8cm square) connected and integrated into an inverted V shape.

That is, in the example of FIG. 2, the three beam elements 14 are
Combine them in a shape and connect each other with four bolts 15 and nuts I
In the example shown in FIG. 4, five beam elements 14 are combined in an inverted V shape and similarly tied and integrated.

As shown in FIGS. 2 and 4, the bundle member 11 has a pantograph shape (corresponding to the cross-sectional shape of the beam member IO).
The beam member 1 is attached to the top of the bundle member 11.
0 is placed and joined.

Further, the bundle member 1■ is mainly composed of laminated wood like the beam member 10, and in this embodiment, it has a smaller cross section than the beam element 14 (150 cm in this embodiment).
It is formed by integrating four bundle elements 20 at the corners) tightly connected by four connecting metal fittings.

That is, the first connection hardware 17 is placed on the top of the NSF, and the second connection piece 17 is placed on the bottom.
A connecting hardware 18 is arranged, and further, third connecting hardware 19 and 19 are respectively arranged at both left and right corners.

[rI: The four east elements 20 are fastened with bolts and nuts (not shown) at the positions of a predetermined number of mounting holes 21 formed at each end of each connecting metal fitting 17, 18, 19. , which is fixed and integrated.

In addition, as shown in FIGS. 5 and 6, each connection hardware 17
．． 18 and 19 are respectively ``V root plate-shaped body parts 17a and 18a.
, 19a are welded together at the center of the end of the east element, so that the main body parts are not visible from the outside.

In addition, in the first connecting hardware 17 described in BJ, as shown in FIG. 5, the plate 17b on the left side has an I
One end 31a of the i'j lia second tensile member 31 is connected and fixed.

Furthermore, from one end of plates +7b and +7c, a fourth
As shown in the drawings and FIG. 5, a pair of joint plates +7d are extended in a ■-shape, and the joint plates 17d are sandwiched between the joints of the beam elements 14 phases Ff of the beam member 10 described above. The above-mentioned bolt connection is made.

Therefore, in this embodiment, four bolt penetration holes 22 are formed in the joint plate 17d as shown in FIG. 5.

As shown in FIG. 4, reinforcing plates 23 are abutted on the beam elements 14 located at the ends of the beam member 10, respectively, to prevent them from sinking in during tightening.

Next, in the second connection hardware 18, as shown in the figure, similarly to the first connection hardware 17, from the main body portion 18a to the east element 20,
Plates 18b, 18 that serve both for positioning and reinforcing the ends of
c is integrally formed to protrude, and furthermore, the plate 18
A pair of joint plates 18d are formed in a ■-shape and extend from one end of ``b'' and 18c.

Two mounting holes 24 are formed at the same position in each of the pair of joining plates 18d, and two approximately U-shaped bolts 25 are mounted in the mounting holes 24 with nuts 26 as shown in FIG. The first tensile member 30 is held by a substantially U-shaped bolt 25.

In addition, in the third connecting hardware 19 described in 1Fj, as shown in FIG. Furthermore, a pair of joining plates 19d are integrally formed to extend across the inner end portion of the main body portion 19a.

A tension device 27 is disposed between the left and right joint plates 19d.

+iif The tension device 27 includes a pair of threaded reinforcing bars 28
and a turnbuckle 29, one end 28a of the double-threaded reinforcing bar 28 connects to the pair of joining plates 19a shown in 077.
4 are fixedly fixed in between by means such as welding, and threaded portions formed at the other ends 28b are screwed and connected to turnbuckles 29, respectively.

Therefore, by rotating the turnbuckle 29 in a predetermined direction, the pair of third connecting metal fittings 19 are tightened in a direction in which they approach each other.

Note that the bundle member 10 shown in FIGS. 2 and 3 also has the same configuration as described above, however, in the case of the bundle member 11 shown in FIGS. 2 and 3, the first Regarding the connecting hardware 17, as shown in FIG. 3, the left and right plates 17c are the same, and there is no connection with the tension member.

Next, as for the support member summer 3, as shown in FIGS. 7 and 8, in this embodiment, the support member 40 and the auxiliary pillar material 4 are
1 and four diagonal members 42.4; 3, 44, and 45, and in this embodiment, the column material 40, the auxiliary column material 41, and the diagonal members 42 to 45 are all connected to the beam element. It is made of laminated wood with the same cross section (180cm square) as I4,
Only the diagonal member 45 is constructed using two pieces of laminated timber having the above-mentioned cross section.

Further, the lower ends of the column material 40 and the diagonal material 44 are tightly fixed using bolts and nuts by a column base metal fitting 46 having a shape as shown in the figure.
7, it is tightly fixed using bolts and nuts.

Further, at both ends of the diagonal members 42 and 43 and at the upper end of the diagonal member 44, first end hardware 4 as shown in FIGS.
8 is tightly fixed with bolts and nuts, and the diagonal member 4
Regarding No. 2, the first end hardware 48 at the upper end is pin-jointed to the joint plate 49 fixed to one end of the -1 end of the pillar material 40 by a pin material 50, and the first end hardware 48 at the lower end is attached to the auxiliary pillar. It is similarly joined to a joining plate 51 fixed to the upper end of the material 41 by a pin material 50.

Regarding the diagonal member 43, the first end hardware 48 at the upper end is pin-jointed to the joining plate 51 by a pin member 50, and the first end hardware 48 at the lower end is fixed at an intermediate position of the column member 40. Similarly, a pin member 50 is used to join the pin member 52 to a joining metal fitting 52 having the shape shown in the figure.

Regarding the diagonal member 44, a first end metal fitting 48 at the upper end is pin-jointed to a joining metal fitting 53 fixed at an intermediate position of the auxiliary column member 41 by a pin member 54 having a larger diameter than the pin member 50. .

As for the diagonal member 45, as shown in FIG. 9 and FIG. The second end hardware 55 at the upper end is connected to the first end plate 5 by a pin member 54, as shown in FIG.
Similarly, the pin member 54 is connected to a connecting metal fitting 56 arranged on the top of the bundle member 11a and having the shape shown in the drawing.

In this embodiment having such a configuration, the beam member IO1 bundle member 11 and the support member 13, which are biopsy component members, are each formed by using two types of laminated wood having a relatively small cross-sectional shape. In addition, for members that require strength such as the beam member 1O, the beam elements I4 made of laminated wood with the above-mentioned cross-sectional shape are connected in an inverted V shape and integrated, so two types of The main components can be formed using only cross-sectional laminated timber, allowing for systemization of the components used.

Furthermore, since only laminated wood with a small cross section is used, it can be formed at a much lower cost.

Moreover, since the beam member 10 is constructed by connecting beam elements 14 in an inverted V shape, as shown in FIG. By attaching the roofing material 60, it is possible to easily form a roof having a folded plate structure as shown in the figure.

In this embodiment, as described above, the tensile material is composed of the first tensile material 30 and the second tensile material 31, which are located on the support member 13 side of the beam member 10, as shown in FIG. A first bundle member 11a is attached to the area where stress is most concentrated, and a second bundle member 11a is attached to the central bundle member 11b attached to the approximate center of the beam member 10 and a second bundle member disposed at an intermediate position from the bottom of the central tension member 61. The first
A tensile material 30 is stretched.

Further, the second tension member extends from the top of the second bundle member 11t adjacent to the center side of the first bundle member 11a to the top of the rod member 40 of the support member 13 via the bottom of the first bundle member 11a. 31 is hung.

Furthermore, the above-mentioned number! The tension member 30 is provided with tightening devices 62 at both ends and at the middle thereof, and both the tension device 27 and the tightening device 62 introduce prestress into the first tension member 30. It is configured as follows.

However, the present invention is not limited to the above embodiments, and the number of pieces of laminated wood used and the type of cross section used for the beam elements 14, bundle elements 17, etc. It is possible.

Further, by using the inverted V-shaped beam members 10 as in the above embodiment, the present invention is suitable for forming a folded plate roof. It is also possible to create a normal shell/roof by installing separate horizontal members horizontally.

In addition to the roof structure, depending on the conditions, the floor 1173
It is also applicable to 14 bodies.

Furthermore, it goes without saying that various modifications can be made without departing from the spirit of the present invention, such as the possibility of adopting shapes other than the above-described embodiments for the various hardware used.

(Effects of the Invention) The present invention is configured as described in 1-6, and provides the following effects.

(1) The main components can be formed from only two types of laminated wood, or depending on conditions, one type of cross-sectional shape, and the systemization of the components used can be achieved.

(2) Because only laminated wood with a relatively small cross section is used,
It can also be formed at a much lower cost.

(3) Since the beam member is constructed by connecting beam elements in an inverted V shape, if the roofing material is installed along the top surface of each beam member arranged at a predetermined interval in the column direction, the folded plate The roof of the structure can be easily formed.

[Brief explanation of drawings]

1 to 11 do not show one embodiment of the present invention, FIG. 1 is an explanatory diagram of the main part showing a schematic configuration of a strung beam structure according to the present embodiment, and FIG. 2 shows a beam member and a bundle. An explanatory diagram of the main parts showing the structure of the member, FIG. 3 is a side view thereof, FIG. 4 is an explanatory drawing of the main parts showing the structure of other beam members and bundle members, FIG. 5 is a side view thereof,
FIG. 6 is an explanatory diagram showing the tensioning device, FIG. 7 is an explanatory diagram showing the structure of the support member, FIG. 8 is an explanatory diagram showing the configuration of the diagonal member, FIG. The figure is a cross-sectional view of the first
FIG. 1 is an explanatory diagram showing the roof shape in the row direction, and FIG. 12 is an explanatory diagram showing a conventional stringed beam structure. DESCRIPTION OF SYMBOLS 10... Beam member, 11... Bundle member, 3... Supporting member, 4... Beam element, 7... First connection hardware, 8... Second connection hardware, 9... 3rd connection hardware, 20... East element, 27... Tension device, 30... First tension member, 31... Second tension member, 40... Pillar material, 41... Auxiliary column material, 42.43.44.45... diagonal material, 60... roofing material, 62... tightening device. Patent applicant Imagawa

Claims (4)

[Claims] (1) In a tensioned beam structure in which a beam member and a tensile member disposed below the beam member are connected by a plurality of bundle members, the beam member is an inverted beam element made of laminated wood and having a relatively small cross section. A strung beam structure using laminated wood that is connected and integrated in a V-shape. (2) The bundle member has a pantograph shape corresponding to the cross-sectional shape of the beam member, and the beam member is placed and joined to the top of the bundle member, and the bundle member has a pantograph shape corresponding to the cross-sectional shape of the beam member, and the bundle member has a pantograph shape that corresponds to the cross-sectional shape of the beam member, and the beam member is placed and joined to the top of the bundle member. , connecting metal fittings are arranged at both the left and right corners, and each end of the laminated wood with a predetermined cross section that connects the connecting metal fittings is fixed by each connecting metal fitting to form an integral structure. 1
A strung beam structure using laminated wood as described in . (3) The beam member is arranged in a mountain shape with the central portion between the supporting members as the apex, and the beam member, the bundle member, and the tension member form a roof string beam. A strung beam structure using the laminated wood according to item 1 or 2. (4) The support member is formed by integrally joining together a piece of laminated wood having the same cross section as either or both of the beam member and the bundle member using fastening hardware.
A strung beam structure using the laminated timber according to any one of Items 1 to 2.