JP3672204B2 - Frame structure with damping damper supported by eccentric braces - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a frame structure including a passive vibration damper supported by an eccentric brace in a steel reinforced concrete structure including a steel frame, a composite structure, and a mixed structure.
[0002]
[Prior art]
When providing a passive vibration dampers p connected to the support member of the brace type in the scaffold comprising the columns and girders, as shown in FIGS. 5 and 6, the brace c at the junction of the pillar a and girders b Are joined by welding w or high-strength bolt d.
In the figure, d is a gusset plate, e is an end plate, f is a stiffener, g is a beam joint, h is an accessory plate, i is a high strength bolt, and j is a scallop.
[0003]
[Problems to be solved by the invention]
Junction of the conventional columns, girders, and brace, since the brace member is welded to both the column and girder, or are joined by high-strength bolts, bonding structure is complicated, steel frame, and It takes time for on-site processing, and this increases the construction cost.
The pillars, if girders, and the axis of the brace is through the bending yield hinge beam end occupying most of the energy absorption capacity occurs at scaffold comprising a conventional beam-yielding pillars and girders As a result, there arises a problem that it is difficult to reflect the energy absorption capability of the framework in the design.
[0004]
The present invention has been proposed in view of the problems of the prior art, it is an object of the brace member, to simplify the junction structure of the framework including the pillars and girders, the workability It improves the seismic energy absorption capacity of passive vibration dampers in the event of a large earthquake, and generates a bending yielding hinge at the beam end in the event of a large earthquake, improving the seismic safety of the structure. .
[0005]
[Means for Solving the Problems]
To achieve the object, the framework structure according to the present invention is a vibration damping structure formed by more supports passive damping damper brace joined to the scaffold including the pillars and girders, wherein said brace member the position of the junction with the framework, said on girders, as a position that is eccentric to the beam midspan side of columns and beams joints, joining the brace to the girder, the beam end of the girder the length of the between to the junction between the brace member, which is constituted so as to generate a bending yield hinge when a large earthquake.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
The most preferred embodiment of the present invention shown in the drawings will be described below.
1 and 2, 1 is steel columns, 2 welding w and gusset plates 3 on the steel column 1, in steel girders joined via a high-strength bolts 4, the pillar-in upper and lower steel girder 2 a midspan side of the steel girder 2 from joints, 1.5 to 2 times the RyoNaru, one end of the brace member 5 is welded w on an eccentric position, the other end of the brace member 5 A passive damping damper 6 is attached to and supported by the motor. Figure 7 is a stiffener which brace 5 at the steel girder 2 is welded between the attached upper and lower flanges and the web.
[0007]
Thus the brace member 5, the position of the junction between the framework comprising posts 1 and the girders 2, on the girders 2, the beam midspan portion side of the columns and beams junction RyoNaru D 1.5 as the position is about 2 times eccentricity, by bonding the brace 5 to girders 2, Ru Tei is secured long enough to generate a yield hinge bending the large beam end when a large earthquake. That is, a portion of the large beam 2 between the beam end and the joint portion with the brace material 5 is configured to generate a bending yield hinge during a large earthquake.
3 and 4 show another embodiment of the present invention. In the embodiment, the passive damping damper 6 is supported from both above and below via the brace material 5, whereas the damping damper is shown in FIGS. 6 is supported from below via the brace material 5. In the figure, the same reference numerals are attached to the same parts as in the above embodiment.
[0008]
【The invention's effect】
Framework with vibration dampers according to the present invention, the position of the junction of the brace member and the framework to support the passive vibration damper, on girders, is eccentric to the beam midspan side of columns and beams joints was in the position, and then, is joined to the girder by eccentric brace member to the beam midspan side girders, the junction structure between the bone set and the brace member is simplified, construction labor steel frame, and the like, and Construction cost is reduced.
[0009]
The seismic energy absorbing capacity by passive damping damper when a large earthquake, which is supported by the brace member is effectively exhibited, for larger earthquakes, position brace material is eccentric to the beam mid-span side girders They are joined, since it is configured so that it is possible to generate a breakdown hinge bent girder ends, the seismic safety of the structure is improved to.
[0010]
According to the invention of claim 2, the position of the junction of the brace member and the bone sets, on the girders, the beam midspan side of columns and beams joints, 1.5 to 2 times the eccentricity of RyoNaru the position and to Rukoto obtained by, ensuring long enough to generate a bending yield hinge girder ends when a large earthquake, those capable of improving the seismic safety of the structure.
[Brief description of the drawings]
FIG. 1 is a front view showing an embodiment of a frame structure having a vibration damper supported by an eccentric brace according to the present invention.
[Figure 2] pillar of FIG. 1 is a front view showing a detail of the joint of the girders, brace.
FIG. 3 is a front view showing another embodiment of the present invention.
Pillar of [4] 3, is a front view showing a detail of the joint of the girders, brace.
FIG. 5 is a front view of a conventional structure.
[6] pillars in FIG. 5 is a front view showing a detail of the joint of the girders, brace.
[Explanation of symbols]
1 Column 2 girders <br/> 3 gusset plate 4 high strength bolts 5 brace 6 passive vibration dampers 7 stiffeners

Claims (2)

In damping structure formed by more supports passive damping damper brace joined to the scaffold including the pillars and girders, the position of the junction between the framework and the brace, on the girders, columns, as the position is eccentric to the beam midspan side of the beam joints, and bonding the brace to the girder, the length of the between the beam end of the girder to the junction between the bracing member , framework having a vibration dampers supported by eccentric braces, characterized by being configured to generate the bending yield hinge when a large earthquake. The position of the junction between the framework and the brace, on the girders, the beam midspan side of columns and beams joints, as a position that is 1.5 to 2 times the eccentricity of RyoNaru, the braces The frame structure which has the damping damper supported by the eccentric brace of Claim 1 which joined the material to the said big beam.

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