JP5651198B2 - Beam support structure of building - Google Patents

Description

  The present invention relates to a beam support structure for supporting a beam of a building, and more particularly, to a beam support structure using a beam support member as a column for which an earthquake countermeasure is taken.

  As a well-known earthquake countermeasure for buildings, there are earthquake resistance, vibration control and seismic isolation structures. The seismic structure is a structure that enhances the strength of the building by, for example, reinforcing metal fittings or reinforcing plates (Patent Document 1, etc.), and the seismic isolation structure is a vibration between the ground and the building by, for example, a rolling member or an air layer The transmission is cut off (Patent Document 2, etc.), and the vibration control structure is a structure that suppresses the vibration of the building by, for example, a damper (Patent Document 3, etc.).

JP-A-11-050671 JP 11-315882 A Japanese Patent Laid-Open No. 11-350778

  In any of the above-mentioned earthquake countermeasure structures, it takes time to manufacture and install, and if the cost of parts becomes high or the cost of parts is low, it is often difficult to expect functions such as earthquake resistance.

  An object of the present invention is to provide an inexpensive beam support structure that can exhibit a plurality of functions such as an earthquake resistance function and a seismic isolation function, or an earthquake resistance function and a vibration control function, by using a single type of beam support member. is there. Another object of the present invention is to make it possible to easily change the thickness of the beam support member according to various specifications of the building.

In order to solve the above-mentioned problems, the present invention forms a beam support member that can be bent by bundling a plurality of wire rods made of spring steel, and the lower end portion of the beam support member is formed on the foundation or lower floor of a building. The upper end of the beam support member is connected to the beam by a ball joint mechanism, and the connection angle with respect to the beam on the upper floor is variably connected to the upper floor beam by the ball joint mechanism. A first joint member provided at the upper end of the beam support member with a spherical recess, and a spherical protrusion that fits in the spherical recess so as to be rotatable in almost all directions, and below the upper floor beam. And a second joint member fixed to the wall portion .

  In the beam support structure, preferably, the following configuration is adopted.

(A) The first joint member having the spherical concave portion is divided into two by a substantially vertical surface passing through the spherical core.

(B) In the structure in which the first joint member is provided on the beam support member side, the first joint member is integrally provided with a connection tube extending downward, and the connection tube includes The upper ends of the plurality of wires are fitted and connected so as to be movable by a certain distance in the cylinder center direction.

(C) before Kihari support member are bundled by a ring-shaped metal restraining member. A ring-shaped steel strip or a reinforcing bar can be used as the restraining member.

(D) The beam support member is bundled by a helical restraining member. As the helical restraining member, for example, a reinforcing bar can be used.

(1) Since a beam support member is formed by bundling a plurality of spring steel wires, the support strength of the beam is improved, thereby improving the seismic resistance function, and the damping function is also provided by the elastic force of the spring steel. It can be demonstrated.

(2) Since the beam support member is configured by bundling a plurality of wires, the thickness of the beam support member can be easily changed according to the specifications of the building by changing the number of wires to be bundled. The seismic strength can be changed.

(3) The lower end of the beam support member is rigidly connected to the foundation of the building or the lower floor beam, and the upper end is connected to the upper floor beam by a ball joint mechanism. When the load is received, the deformation load (stress) applied to the upper end portion of the beam support member is absorbed and reduced by the turning operation of the ball joint mechanism, thereby further improving the durability.

(4) Since the first joint member having the spherical concave portion is provided at the upper end of the beam support member and the second joint member having the spherical convex portion is provided at the upper floor beam, the spherical concave portion and the spherical surface are provided. The support of the beam is more stable than in the case where the protrusions are arranged upside down.

(5) According to the configuration (a) , since the first joint member having the spherical concave portion has a two-part structure, the spherical convex portion can be easily assembled into the spherical concave portion.

(6) According to the configuration (b) , the lower first joint member is provided with a connecting tube extending downward, and the upper ends of the plurality of wire rods are arranged at a predetermined distance in the tube center direction in the connecting tube. Because it is movably fitted and supported, the total height of the beam support member can be automatically adjusted within the movable distance according to the beam height when the beam support member is assembled. Easy to assemble.

(7) According to the configurations (c) and (d) , the wire support member is bundled by a restraining member made of a ring-shaped steel strip or reinforcing bar, or a spiral reinforcing bar. It is easy to handle and prevent strength from being lowered.

It is one Embodiment of this invention, Comprising: It is a front view of the beam support member used as a pillar for reinforcement of a building. It is II-II sectional drawing of FIG. It is an enlarged view of the upper end part of the beam support member of FIG. FIG. 4 is a sectional view taken along line IV-IV in FIG. 3. It is a top view of the 2nd joint member. It is VI-VI sectional drawing of FIG. It is a modification of this invention, and is a front view similar to FIG.

  An embodiment of the present invention will be described with reference to FIGS. FIG. 1 shows an example in which a beam support member is used as a reinforcing column for a steel structure building. In FIG. 1, in a steel structure building, a concrete foundation 2 is formed integrally with a discarded concrete 1, and an H steel foundation beam (floor beam) 3 is embedded in the concrete foundation 2. A plurality of steel columns 5 are erected on the foundation beam 3 in a vertical state. An H steel beam 6 is connected to the upper ends of the plurality of steel columns 5 in a rigid manner.

  In the vicinity of the steel column 5, a beam support member 10 is arranged in a vertical state as a reinforcing column. The beam support member 10 includes a cylindrical wire bundle 11 formed by bundling a plurality of (for example, several hundred) spring steel wires 11a with a plurality of steel strips 11b, and an upper connecting tube made of metal such as stainless steel. 13 and a lower connecting tube 14 made of metal such as stainless steel. The lower connection cylinder 14 is rigidly connected to the foundation beam 3. On the other hand, the upper connection cylinder 13 is connected to the upper beam 6 via the ball joint mechanism 12, and the connection angle of the beam support member 10 to the beam 6 can be changed by the bending operation of the ball joint mechanism 12. ing. The wire diameter of the spring steel wire 11a is, for example, about 1 mm to 12 mmφ. Of course, the wire is not limited to such a wire diameter.

  2 is a cross-sectional view taken along the line II-II in FIG. 1, and the lower connecting tube 14 is inserted from above the foundation beam 3 into the through hole of the upper wall portion 3a of the foundation beam 3 and the cutout of the web 3b. It reaches the upper surface of the lower wall portion 3c and is fixed to the foundation beam 3 by welding. The lower connection cylinder 14 is embedded in the foundation concrete 2 together with the foundation beam 3, but the upper end portion of the lower connection cylinder 14 protrudes upward from the upper surface of the foundation concrete 2. A plurality of metal reinforcing plates 15 are fixed to the outer peripheral surface of the upper half portion of the lower connecting cylinder 14 at equal intervals in the circumferential direction, and each metal reinforcing plate 15 is welded to the base beam 3 by welding. Is fixed to the upper wall 3a.

  The lower end portion of the wire bundle 11 is inserted into the lower connection tube 14 from above and reaches the upper surface of the lower wall portion 3c of the foundation beam 3. The grout material injected into the lower connection tube 14 The side connection cylinder 14 is fixed.

  The upper end portion of the wire bundle 11 is fitted and connected in the upper connecting cylinder 13 so as to be movable in the cylinder core direction (vertical direction) by a certain distance.

  3 is an enlarged front view of the ball joint mechanism 12 and the upper connecting cylinder 13, FIGS. 4 and 6 are sectional views taken along lines IV-IV and VI-VI in FIG. 3, respectively, and FIG. 5 is an upper second joint member. 22 is a plan view of 22. FIG. In FIG. 3, the ball joint mechanism 12 is composed of a first joint member 21 having a spherical concave portion 21a and the second joint member 22 having a spherical convex portion 22a. The spherical convex portion 22a is a spherical concave portion. It fits in 21a so as to be rotatable in almost all directions. In some cases, a lubricant such as grease may be applied to the spherical recess 21a.

  A base plate 23 is fixed to the upper surface of the upper connecting cylinder 13 by welding, and a first joint member 21 of the ball joint mechanism 12 is fixed to the upper surface of the base plate 23 by a plurality of bolts 25.

  In FIG. 4, the lower first joint member 21 has a structure divided into two by a vertical surface D1 passing through the spherical core O1, and the two divided pieces 21d and 21d include a pair of bolts 26 and a pair of nuts. 27.

  In FIG. 6, the upper second joint member 22 having the spherical convex portion 22a integrally has a disk-like flange portion 22b at the upper end, and the flange portion 22b is an upper steel beam made of H steel. A plurality of bolts 30 and nuts 31 are fixed to the lower wall portion of 6.

  FIG. 5 clarifies that the flange portion 22b of the second joint member 22 has a disk shape.

  The beam support member 10 having the above-described configuration is maintained in a straight line extending in the vertical direction by the restoring force of the spring steel in a natural state, and the spring steel wire 11a itself is subjected to a horizontal swing or load of a predetermined level or more. While bending within the elastic deformation range, the spherical concave portion 21a and the spherical convex portion 22a rotate relatively, whereby the ball joint mechanism 12 is bent. When the shaking ends or the lateral load is removed, the original straight state is restored.

  In FIG. 2, when an earthquake occurs, the beam support member 10 erected as a reinforcing column reinforces the strength of the existing steel column 5, so that it is possible to improve the earthquake resistance function of the building. For horizontal shaking, the lateral load (stress) applied to the beam support member 10 is deflected in the horizontal direction by the elastic function of the spring steel wire 11a and the bending action of the ball joint mechanism 12 at the upper end. ). After that, since it is restored to a vertical posture, it can exhibit a high damping function and seismic isolation function against horizontal shaking, and prevents destruction of the building due to shaking.

  The beam support member 10 shown in FIG.1 and FIG.2 changes the number of the wire 11a which comprises the wire binding body 11 according to the specification of a building, and makes the diameter (area) of the wire binding body 11 easy by it. Can be changed.

[Modification]
FIG. 7 shows a modified example of the present invention, which has a structure using a helical rebar as the restraining member 11b for bundling the wire 11a. Other structures are the same as those in the above embodiment.

[Other embodiments]
As a building in which the beam support member according to the present invention is used, there are various types of buildings such as a wooden building, a reinforced concrete high-rise building, a steel building, a plant building, a railway, a road effect building, etc. It can be applied to beam support structures in buildings.

2 Concrete foundation 3 Foundation beam 5 Steel column 6 Beam 10 Beam support member 11 Wire bundle 11a Spring steel wire 11b Band steel (an example of restraint member)
12 Ball joint mechanism 13 Upper connection cylinder 14 Lower connection cylinder 21 First joint member 21a Spherical concave portion 22 Second joint member 22a Spherical convex portion

Claims (5)

By bundling a plurality of wire rods (11a) made of spring steel, a bendable beam support member (10) is constructed,
The lower end of the beam support member (10 ) is rigidly coupled to the beam of the building foundation or lower floor (3) ,
The upper end of the beam support member (10) is connected to the upper floor beam (6) by a ball joint mechanism (12 ) so that the connection angle to the upper floor beam (6) can be changed,
The spherical joint mechanism (12) has a spherical recess (21a) and is substantially entirely in the first joint member (21) provided at the upper end of the beam support member (10) and the spherical recess (21a). And a second joint member (22) fixed to the lower wall portion of the beam (6) on the upper floor and having a spherical convex portion (22a) that is rotatably fitted in a direction . Beam support structure. In the beam support structure of the building of Claim 1,
The beam support structure for a building, wherein the first joint member having the spherical recess is divided into two by a substantially vertical plane passing through a spherical core. In the beam support structure of the building of Claim 1 or 2,
The first joint member having the spherical concave portion, the connection tube extending downward is formed integrally,
A beam support structure for a building, wherein upper ends of the plurality of wire rods are fitted and connected in the connecting cylinder so as to be movable by a predetermined distance in the cylinder center direction. In the building beam support structure according to any one of claims 1 to 3,
The beam support member is a building beam support structure that is bundled by a ring-shaped metal restraining member. In the building beam support structure according to any one of claims 1 to 3,
The beam support member is a building beam support structure in which the beam support member is bundled by a helical restraining member.

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