JP2000081085A - Structural member with hysteresis damper - Google Patents

Abstract

PROBLEM TO BE SOLVED: To shorten the length of hysteresis damper members, facilitate the manufacture of the member and reduce the manufacturing cost by forming a long member receiving an alternate axial force of tension and compression in such a state as joining the hysteresis damper members having respective other ends connected to another member to both ends of an intermediate material arranged in the intermediate part. SOLUTION: A diagonal 7 is constituted of joint members 13 attached to diagonal joint parts of columns 21 and beams 22, an intermediate material 8 arranged in the intermediate part, and a pair of hysteresis damper members 6 having one end connected to the intermediate material 8 and the other end fixed to an end joint board respectively 10. It supports an alternate axial force of the tension and the compression and damps it by absorbing the vibration energy such as an earthquake. The division of the hysteresis damper member 6 can shorten the length of the joint part, reduce the additional bending moment acting on the joint part, and miniaturize the joint member 13. The dimension of the intermediate member 8 is adjusted so that the rigidity of the diagonal 7 can be freely adjusted irrelevant to the dimension of the hysteresis damper member 6.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structural member having a hysteretic damper applied to a support structure such as industrial equipment.

[0002]

2. Description of the Related Art For example, diagonal members (see FIG. 9) inserted diagonally between columns and beams of a structure generally support a tensile force or a compressive force caused by deformation between the columns and beams. 1
As shown in Fig. 1, the yield strength is determined by the yield strength (Ny) for tensile force and the buckling strength (Ncr) for compressive force, which is smaller than the yield strength, and the load capacity decreases after buckling. . Recently, however, a structure has been developed that restrains the buckling so that the above-mentioned diagonal material can maintain the same strength as the tension even when compressed. ) Works as a hysteretic damper. FIG. 9 shows the configuration of a conventional diagonal member having a hysteretic damper function. The diagonal member 1 is inserted between the joining members 3 and 3 attached to the diagonal joints of the column 21 and the beam 22, respectively. And a set of hysteretic damper members 2 and end joint plates 4a at both ends thereof. Hysteretic damper member 2
Is composed of a core material 2a that causes plastic deformation, a stiffening steel pipe 2b loosely fitted and circumscribed with a predetermined gap c from the core material 2a, and a slip stopper 5 for the stiffening steel pipe 2b. One end of the end joint plate 4 a is usually butt-welded to the damper core 2 a, and the other end is joint-processed using the bolt joint 4 to connect to the joint member 3.

FIG. 10 (a) shows a cross-sectional structure of the hysteretic damper member 2. An H-shaped steel is used for the core member 2a, and the tensile force and the compressive force generated between the diagonal joints are controlled by the core member 2a. To support. At this time, even when the compressive force acts, the core material 2a
Buckling deformation is restrained by the stiffening steel pipe 2b to prevent a decrease in load-bearing force due to buckling, and a stable proof stress (Ny) similar to the pulling side.
And a gap c is provided so that an axial force acting on the damper member 2 is not applied to the stiffening steel pipe 2b. FIG. 10 (b) shows another cross-sectional configuration, in which sheet steel is used for the core material 2a, concrete 2d is injected into the space with the stiffening steel pipe 2b, and unbonded material is applied between the core material 2a and the concrete 2d. The membrane can support the same yield strength level (Ny) for both tensile and compressive axial forces as described above.

FIG. 12 shows the hysteresis characteristic of the diagonal material 1. The restoring force characteristic, that is, the curve drawn by the axial deformation δ with respect to the alternating axial force ± Ny is a hysteresis curve as shown by a figure abcd. The figure area shows the plastic energy absorption capacity, and stably exerts the function as a hysteretic damper when an earthquake acts.

[0005]

As shown in FIG. 13, the joint member 3 of the diagonal member 1 has an axial force N based on the relative inclination angle θ of the diagonal member based on the interlayer deformation angle caused by the load of the external force. Force N
An additional bending moment Mj due to a acts. To reduce the additional bending moment Mj, the joint length (Lj
+ E), the hysteresis damper length L
c becomes longer. If the hysteretic damper member length Lc becomes longer, the core material 2a is easily deformed. Therefore, it is necessary to increase the thickness of the stiffening steel pipe 2b that restrains the core material 2a. . Conversely, when the hysteretic damper member length Lc is reduced, the joint length (Lj + e) increases accordingly, and the additional bending moment Mj due to the component force Na increases, so that the joining member 3 is increased in size to increase the strength. However, there is a problem that the production cost increases.

[0006]

Means for Solving the Problems The present invention is intended to solve the above-mentioned problems, and a first invention is a long member which receives an alternating axial force of tension and compression, and has an intermediate portion at an intermediate portion thereof. A structural member provided with a hysteretic damper, wherein a hysteretic damper member is provided, wherein a hysteretic damper member is provided at both ends of the intermediate member and the other end is connected to another member. In the second invention, the hysteretic damper member has a core member joined at one end to an intermediate member and an end joint plate at the other end for coupling to another member, and loosely fits with the core member. A stiffened steel pipe fixed to an intermediate member so as to circumscribe the stiffened steel pipe; Further, the third invention is characterized in that the core is composed of a plurality of rods, and the rods are arranged with a stiffening steel pipe via a spacer with a predetermined gap therebetween. A structural member having a mold damper.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The structure of a structural member (here, a diagonal member) having a hysteretic damper according to the present invention will be described with reference to the drawings. As shown in FIG. 1, a swash plate 7 of the present invention includes joining members 13, 13 attached to diagonal joining portions between a column 21 and a beam 22, respectively, and an intermediate member disposed at an intermediate portion of the swash member 7. 8 and
One end of each is this intermediate material 8 (shown is a circular steel pipe)
And a pair of hysteretic damper members 6 having the other end fixed to the end joint plate 10.
Are attached to the joining members 13 by bolt joints 11. As shown in FIGS. 2 to 5, the hysteretic damper member 6 has a cross-shaped interrupting gusset plate 14 having an end plate 16 and attached to the end 8 a of the intermediate member 8, and one end of the cross-shaped gusset plate 14. A plurality of core members 6 which are fillet welded and joined at the other end to the end joint plate 10 by fillet welding.
a, a cross-shaped spacer 17 for arranging the plurality of (four in the figure) core members 6a in parallel at a predetermined interval, and fitting and fitting the plurality of core members 6a with a predetermined clearance c. A stiffening steel pipe 6b (square steel pipe in the figure) circumscribed. FIG. 6 shows a different cross-sectional example of the hysteretic damper member 6, and shows a structure in which the stiffening steel pipe 6b of FIGS. 3 and 4 is rotated by 45 degrees.

Hereinafter, the operation of the present invention will be described. For example, when an earthquake load is applied, the diagonal member 7 receives an alternating axial force of tension and compression. This axial force is transmitted from the joining members 13 at both ends of the diagonal member via the end joint plate 10 to the core member 6a of the hysteretic damper 6. It is transmitted to the intermediate material 8. When the tensile axial force reaches the yield axial force + Ny of the core 6a, plastic deformation + δ occurs, and when the compressive axial force reaches the yield axial force -Ny of the core 6a, plastic deformation -δ occurs. At this time, the core member 6a that has received the compressive axial force tends to buckle, but the deformation is restricted by the stiffening steel pipe 6b that is circumscribed, and buckling is prevented. In this way, the entire diagonal member 7 responds by drawing a hysteresis curve as shown in FIG. 12, and as a result, the seismic energy is absorbed and the vibration is attenuated. In addition, the yielding axial force −Ny of the damper core material transmitted from the hysteretic damper members 6 at both ends acts on the intermediate member 8. At this time, the entire diagonal member has a structural system as shown in FIG. By setting the cross-sectional dimension of the intermediate member 8 so that the intermediate member 8 does not buckle, the hysteresis curve of FIG. 12 can be obtained.

[0009]

As described above, according to the diagonal member of the present invention, the intermediate member 8 is disposed at the intermediate portion, and the other end is provided at the other end thereof at the column 2.
1, the hysteretic damper member 6 joined to the joining member 13 attached to the diagonal joint of the beam 22 is connected to support the alternating axial force of tension and compression, so that vibration energy such as an earthquake is absorbed. And can be attenuated. At this time, 1) Since the hysteresis damper member is divided into two parts and arranged at both ends of the diagonal member, the length Lc of the hysteresis damper member can be shortened, so that the member can be easily manufactured and the manufacturing cost can be reduced. Become cheap. 2) By dividing the hysteretic damper member, the joint length (Lj + e) can be shortened, whereby the additional bending moment Mj acting on the joint can be reduced, and thus the joint member 13 can be downsized. be able to. 3) By adjusting the size of the intermediate member 8, the rigidity of the diagonal member can be freely adjusted regardless of the size of the hysteretic damper member. 4) In order to divide the core material 6a of the hysteretic damper member into a plurality of parts and insert the spacers 17 that do not transmit the axial force therebetween,
The gap with the stiffening steel pipe 6b, which is loosely fitted and circumscribed, can be adjusted by changing the spacer dimensions. 5) Core material 6a, cross gusset plate 14, core material 6a
Since the end joint plate 10 and the end joint plate 10 are joined by fillet welding, it is not necessary to perform a time-consuming operation such as butt welding, and the manufacturing cost is reduced. And so on.

[Brief description of the drawings]

FIG. 1 is a view showing the entire configuration of a structural member provided with a hysteretic damper of the present invention.

FIG. 2 is a longitudinal sectional view showing a detailed configuration of a hysteretic damper of the present invention.

FIG. 3 is a diagram showing a cross section taken along line AA of FIG. 2;

FIG. 4 is a diagram showing a BB cross section of FIG. 2;

FIG. 5 is an enlarged view showing details of a portion D in FIG. 3;

FIG. 6 shows another embodiment of the hysteretic damper of the present invention.
Sectional drawing corresponding to FIG.

FIG. 7 shows another embodiment of the hysteretic damper of the present invention.
Sectional drawing corresponding to FIG.

FIG. 8 is a diagram showing the structural system of FIG. 1 including the hysteretic damper of the present invention.

FIG. 9 is a view showing the entire configuration of a structural member provided with a conventional hysteretic damper.

FIG. 10 (a) shows a cross-sectional configuration of the hysteresis damper member, and FIG. 10 (b) shows another cross-sectional configuration.

FIG. 11 is a table showing hysteresis characteristics of the oblique material in FIG. 9;

FIG. 12 is a table showing hysteresis characteristics of a diagonal material according to the present invention.

FIG. 13 is a diagram illustrating a bending moment applied to a joining member of a diagonal member.

[Explanation of symbols]

 Reference Signs List 6 hysteretic damper 6a core material 6b stiffened steel pipe 7 diagonal material 8 intermediate material 10 end joint plate 11 bolt joint 13 joining member 21 column 22 beam

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Yukio Koiso 2-5-1, Marunouchi, Chiyoda-ku, Tokyo Within Sanishi Heavy Industries, Ltd. (72) Inventor Tominari Tsukiyama 1-1-1, Akunouramachi, Nagasaki City, Nagasaki Prefecture Mitsubishi Heavy Industries (72) Inventor Masahiro Mizuhara 1-1-1, Wadazakicho, Hyogo-ku, Kobe-shi, Hyogo Prefecture In-house Kobe Shipyard, Mitsubishi Heavy Industries, Ltd. (72) Inventor Ichiro Inoue 27 Shinashiyaue, Suita-shi, Osaka 401 F term (reference) 3J048 AA03 AB01 AC01 EA13 EA38 3J066 AA01 BA01 BB01 BB04

Claims (3)

[Claims] 1. A hysteretic damper which is a long member which receives an alternating axial force of tension and compression, in which an intermediate member is arranged at an intermediate portion, and the other end of each of the intermediate members is connected to another member. A structural member provided with a hysteretic damper, characterized by joining members. 2. The hysteretic damper member according to claim 1, wherein said hysteretic damper member has a core member joined at one end to an intermediate member and an end joint plate at the other end for connection to another member, and loosely fits and circumscribes the core member. The structural member provided with the hysteretic damper according to claim 1, comprising a stiffened steel pipe fixed to the intermediate member so as to perform the operation. 3. The core material is composed of a plurality of rods, and the rods are arranged with a stiffening steel pipe with a predetermined gap therebetween via a spacer. A structural member provided with the hysteretic damper according to 1.