JPH09228472A - Vibration-damping brace structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To attenuate vibration, by connecting both ends of the diagonal line in a plane of structure of a brace constituted of a square link and fitting a spring extensible in the right-angled crossing direction against the diagonal line in the inside of the square shape. SOLUTION: A spring 6 extensible to the right-angled crossing direction against the diagonal line of the plane of structure 1 constituted of columns and beams of a structure is fitted to a parallelogram brace 5 pin-connected so as to be freely rotatable in the brace members 11, to form a vibration- damping brace 4. And the vibration-control brace 4 is fitted in the diagonal direction of the joints of the column members 2 and the beam members 3 constituting the plane of structure 1 through a gusset plate 13. Accordingly, When a vibration energy larger than a specified value acts on the structure in an earthquake or the like and a large compression force acts to the diagonal direction in the plane of structure of the columns and beams, the spring is tensed and the distance between the two points crossing at right angles against the diagonal line is lengthened. And when a large tensile force acts on the diagonal direction of the plane of structure of the columns and beams, the distance between the two points is shortened.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention particularly relates to a vibration damping brace structure that damps vibrations input to a structure by varying the rigidity of brace members diagonally arranged within the surface of a column or beam. Regarding

[0002]

2. Description of the Related Art As a conventional damping brace structure, there is one disclosed in Japanese Patent Laid-Open No. 1-154971.

This uses a cord-shaped member made of a wire or the like as a brace member in the surface of a column / beam, and a tensioning device for adjusting the tension of the cord-shaped member is hooked inside the endless cord-shaped member. By interposing a buffer having a damper function at one end side of the brace, the brace is made to function as a damper brace or functions as a shock absorber when the rigidity changes suddenly.

Further, the vibration suppression brace described in Japanese Patent Laid-Open No. 1-22046 is installed in a streak shape inside the structure of a structure, and a brace member divided at an intermediate portion thereof and the divided brace member. Leaf springs loaded between the brace members and joined to the end faces of the brace, a holding member arranged on the side where the leaf springs are bent by the axial force from the brace members, and the leaf springs and the holding members. By including a frame body configured to surround and a working member that changes the distance between the pressing member and the leaf spring, especially when a structure shakes due to an earthquake, a strong wind, or the like. The pressing member is separated from the leaf spring by the operating member, and the leaf spring bends by a predetermined amount according to the magnitude of the uncertain external force to absorb the axial force applied to the brace member.

[0005]

However, in any of the conventional vibration damping brace structures as described above, the brace members constituting the brace extend linearly along a diagonal line in the construction plane. Thus, for example, when a tensile force is applied to this brace member due to the influence of an earthquake, wind, etc., the brace member is tensioned and a sufficient resistance force can be given in the diagonal direction of the construction surface. On the other hand, when a compressive force acts on the brace, the member itself largely bends and vibrates, which causes a problem that the damping effect of the brace becomes uncertain.

Therefore, the present invention has been made by paying attention to the above-mentioned unsolved problems of the prior art. The spring in the brace is made to sufficiently function as both compressive force and tensile force to prevent earthquakes, winds and the like. It is an object of the present invention to provide a vibration damping brace structure capable of controlling the frame rigidity of a structure against an uncertain external force.

[0007]

In order to solve the above problems, a damping brace structure according to the present invention has two points provided at both ends of a diagonal line inside a construction surface and at a target position with respect to the diagonal line. And a quadrilateral brace that is rotatably pin-joined by a brace member, and a spring that is stretched between adjacent brace members and expands and contracts in a direction orthogonal to the diagonal line. .

Then, when an uncertain external force such as an earthquake or wind is input to the structure and a tensile force acts in a diagonal direction within the construction plane,
A spring that expands and contracts in a direction orthogonal to the diagonal direction is compressed so as to face the tensile force, so that the distance between two points in the direction orthogonal to the diagonal line becomes shorter, and conversely the distance between the two points in the diagonal direction becomes longer. The brace is deformed.

Further, when a compressive force acts in a diagonal direction on the construction plane, the spring is pulled so as to face the compressive force, and the distance between two points orthogonal to the diagonal line becomes longer, and conversely, the distance in the diagonal direction becomes two. The brace deforms so that the distance between points becomes shorter.

Therefore, since the vibration energy at the time of compression and tensile deformation of the brace is absorbed by the spring, the rigidity of the structure is changed to damp the vibration early. Also,
Since each brace member that constitutes the brace does not form a straight line on a diagonal line in the construction plane but forms a quadrangle link, a large axial force acts inside each member to bend or expand and contract. This is suppressed, and the rate of change in rigidity of the spring with respect to the structure is significantly improved.

Furthermore, a parallelogram brace formed by rotatably pin-joining both ends of a diagonal line inside the construction surface and two points provided at a target position with respect to the diagonal line by a brace member having the same shape. , A spring that is stretched in a direction orthogonal to the diagonal line and that extends between two points provided at a target position with respect to the diagonal line, the spring is provided in the center of the brace, and The angular direction and the expansion / contraction direction of the spring are made to coincide with each other, and the compressive or tensile force applied to each member is directly transmitted to the spring.

Further, the spring may be a coil spring, whereby a specific form of the spring is shown, and the spring is biased in both compression and tension directions applied to the brace. Further, pre-stress may be introduced into the brace member by attaching the cushioning material to the brace member in a tensioned state.

Therefore, if the spring is attached in a pressed state, the brace is tensioned so that the brace expands in the direction orthogonal to the diagonal line in the construction plane, and conversely, the spring is attached to the brace in a tensioned state. For example, it is attached so as to spread in a direction orthogonal to the diagonal line in the construction plane, and when microvibration is input to the structure, sufficient stress transmission is performed in the diagonal direction in the construction plane.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of a vibration damping brace structure of the present invention will be described below with reference to the drawings. In FIG. 1, 1
Is a column-beam construction surface, and here, a damping brace 4 is attached via a gusset plate 13 in a diagonal direction of a joint portion of the column member 2 and the beam member 3 of the column-beam construction surface 1 inside the structure 10. ing.

This damping brace 4 has a parallelogram shape in which two points at both ends of a diagonal line in the construction plane and two points provided at target positions with respect to the diagonal line are rotatably pin-joined by a brace member 11. It comprises a brace 5 and a spring 6 which is attached so as to extend between two points provided at a target position with respect to the diagonal line and which expands and contracts in a direction orthogonal to the diagonal line.

As shown in FIG. 2, each brace member 11 is a steel frame member of the same shape made of a steel pipe, and a connecting plate 7 having a through hole 8 is fixedly provided at the end of each member 11. There is. By inserting and fixing the through holes 8 provided inside the adjacent connection plates 7 by the pin shaft 9, the brace members 11 are rotatably pin-joined to each other.

Although each member 11 is a steel pipe here, it can be made of any steel frame member such as shaped steel. A spring 6 spans between two points provided at the target position with respect to the diagonal line, and a coil spring is applied to the spring 6 here.

A bracket 12 is attached to both ends of the spring 6, and a through hole 13 provided in the bracket 12 is provided with a pin shaft 9 of each joint portion provided at a target position with respect to the diagonal line. The spring 6 is rotatably supported by being inserted.

Therefore, when an uncertain external force such as an earthquake or a wind is introduced into the structure and a slight vibration occurs, the spring 6 of the vibration damping brace does not expand or contract due to its rigidity, and the beam-column structure surface 1 Interlayer shear forces can be transmitted in diagonal directions within.

However, when the vibration energy of the uncertain external force input to the structure exceeds the set value and a large compressive force acts in the diagonal direction within the beam-column structure 1, as shown in FIG. In addition, the spring 6 is pulled so as to face the compressive force, and the distance between the two points orthogonal to the diagonal line becomes longer, and conversely, the brace 5 is deformed so that the distance between the two points in the diagonal direction becomes shorter.

On the contrary, when a tensile force is applied in the diagonal direction within the beam-column structure 1, the brace 5 has a short distance between two points orthogonal to the diagonal, as shown in FIG. , Are deformed so that the distance between two points in the diagonal direction becomes longer.

As described above, when the brace 5 is deformed, the spring 6 expands and contracts in the direction orthogonal to the diagonal line while absorbing the vibration energy in both compression and tension directions, thereby enhancing the vibration damping effect of the structure 10. As a result, the uncertain external force can be relieved at an early stage.

Further, when the uncertain external force is no longer input to the structure 10, the spring 6 is restored to the initial state, so that the permanent deformation of the beam-column structure 1 can be suppressed. In addition, each member 11 that constitutes the brace member 5 is the column beam structure surface 1
A link is formed without being arranged in a straight line on a diagonal line in the inside, and the spring 6 expands and contracts in a direction orthogonal to the diagonal line so that a large axial force acts on each member 11
It is possible to suppress the bending and expansion and contraction of the spring 1 itself, and it is possible to significantly improve the rigidity change rate of the spring 6 with respect to the structure 10.

In the above-mentioned embodiment, the brace 5 is attached to the beam structure 1 without tension. However, the present invention is not limited to this, and the spring 6 may be compressed or stretched in advance. If it is attached to the brace member 5, it is possible to introduce a pre-stress corresponding to the deformation of the spring 6 between the column-beam construction faces 1, and the brace 5 is tensioned so that sufficient stress transmission is performed even for slight vibration. The rigidity of the object 10 can be ensured.

Further, in the above embodiment, the spring 6 is provided between two points provided at the target position with respect to the diagonal line in the construction plane.
However, as shown in FIG. 5, springs 6 that expand and contract in the direction orthogonal to the diagonal line may be provided at two locations in the center of each member.

Further, as shown in FIG. 6, springs 6 made of leaf springs can be attached to the respective members at both ends of the diagonal line of the column-beam structure. Further, the brace 5 does not necessarily have to be a parallelogram link by the brace member 11 made of the same shape member, but can be configured by any quadrangle.

Further, a damper may be used in combination with this coil spring to increase the damping force. In addition, although the case where the damping brace is installed on only one of the diagonal lines in the construction plane has been described in the above-described embodiment, the damping brace may be installed so as to cross both.

Further, each brace member 11 of the brace 5
It is also possible to interpose a low friction material such as a Teflon material on the abutting surface of the joining portion between them so as to function as smooth movement of the joining portion and prevention of wear of the joining surface.

Furthermore, although the vibration damping brace 4 has been described here as being applied to a column-beam structure, it is of course applicable to any structure such as a floor structure.

[0030]

As described above, in the damping brace structure of the present invention, two points at both ends of the diagonal line in the construction surface and two points provided at the target position with respect to the diagonal line are rotated by the brace member. A quadrilateral brace formed by freely pin-joining and a spring that is stretched between adjacent brace members and expands and contracts in a direction orthogonal to the diagonal line. It is possible to suppress the bending and expansion and contraction of itself, and allow the spring in the brace to function sufficiently for both compressive force and tensile force,
It is possible to suitably control the frame rigidity against an uncertain external force such as an earthquake or wind without giving the occupants an uncomfortable feeling due to the extreme decrease in rigidity of the structure.

[Brief description of drawings]

FIG. 1 is a side view showing a structure to which a damping brace structure according to an embodiment of the present invention is applied.

FIG. 2 is a detailed view showing a joint portion of the brace member of FIG.

FIG. 3 is a side view showing the operation of the vibration damping brace structure according to the embodiment of the present invention.

FIG. 4 is a side view showing the operation of the vibration damping brace structure according to the embodiment of the present invention.

FIG. 5 is a side view showing a modified example of the vibration damping brace structure.

FIG. 6 is a side view showing a modified example of the vibration damping brace structure.

[Explanation of symbols]

 1 …… Column Beam surface 2 …… Column member 3 …… Beam member 4 …… Damping brace 5 …… Brace material 6 …… Spring 7 …… Connection plate 8 …… Through hole 9 …… Pin shaft 10 …… Structure 11 …… Brace member 12 …… Bracket 13 …… Gusset plate

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Office reference number FI Technical display location E04B 2/56 643 E04B 2/56 643B 651 651D 651S 652 652J 652T E04H 9/02 311 E04H 9/02 311 F16F 15/02 8312-3J F16F 15/02 K

Claims (4)

[Claims] 1. A quadrilateral brace formed by rotatably pin-joining two ends of a diagonal line inside a structure surface and two points provided at a target position with respect to the diagonal line by a brace member and adjoining each other. A vibration-damping brace structure comprising a spring that is stretched between brace members and expands and contracts in a direction orthogonal to the diagonal line. 2. A parallelogram brace formed by rotatably pin-joining both ends of a diagonal line inside a structure surface and two points provided at a target position with respect to the diagonal line by a brace member having the same shape. A damping brace structure comprising: a spring that is stretched between two points provided at a target position with respect to the diagonal line and expands and contracts in a direction orthogonal to the diagonal line. 3. The damping brace structure according to claim 1 or 2, wherein the spring is a coil spring. 4. The damping brace structure according to claim 1, wherein the spring is attached to the brace in a tensioned state to prestress the brace.