JP2955960B2 - Steel wall structure for damping structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a steel plate wall structure for a high-rise building subjected to a horizontal external force such as a wind and an earthquake.

2. Description of the Related Art One of the conventional earthquake-resistant and wind-resistant elements of a high-rise building is a steel plate earthquake-resistant wall. This steel plate earthquake-resistant wall is incorporated into a frame mainly composed of steel columns and beams by high-strength bolts or welded joints. Further, in order to prevent the shear buckling of the steel sheet at an early stage, the surface of the steel sheet is reinforced by a stiffener, or the precast plate is joined with high-strength bolts.

The conventional steel plate shear wall is intended to exhibit a large external force, mainly stable during a large earthquake, and to exhibit a large plastic energy. Therefore, during relatively small and medium-scale earthquakes that occur relatively frequently, the shear walls are designed to stay within the elastic range. The present invention is proposed in view of the above problems, and its object is to exhibit plastic strain energy even during frequent small and medium-scale earthquakes, reduce horizontal vibration of buildings, and improve livability. Another object of the present invention is to provide a steel plate wall structure for a vibration control framing structure, which is capable of exhibiting high plastic strain energy even during a large earthquake.

In order to achieve the above object, a steel plate wall structure for a vibration damping structure according to the present invention comprises a steel wall panel having an extremely low yield point and a high-tensile steel wall panel alternately. It is arranged in the frame.

FIG. 1 shows the basic principle of the present invention, and FIG.
(B) shows the hysteresis characteristic of the steel material subjected to the repetitive action of the axial force, FIG. 1 (a) shows the type A using the conventional ordinary steel material p, and FIG. 1 (b) shows the extremely low yield in the present invention. The type B which combined the point steel and each high strength steel wall panel is shown. Note Figure 1 (a) (b) initial stiffness of both are equal, and if the yield strength are equal, when the cross-sectional area of common steel p a and A _0, extremely low yield steel q, the cross-sectional area of high-tensile steel r Both cases show A _0/2 . Note that the yield point σ _y of the extremely low yield point steel q 1.0 t / c
m ² , the yield point σ _y of the high-strength steel r = 5 t / cm ² , and the yield point σ _y of the ordinary steel p = 3 t / cm ² . FIG. 2 is a stress-strain relation diagram of a steel material, and FIG. 3 is an axial hysteresis characteristic (−1.5 ‰ ≦ ε).
≤1.5 ‰) Figure 4 shows the axial loading history (-3 ‰ ≤ε≤3)
‰). FIG. 5 shows the axial loading history (−30 ° ≦ ε ≦ 3).
0 °). As is clear from the above, in the region where the ordinary steel p is in the elastic range, the extremely low yield point steel q and the high tensile steel r
And the combined steel has already exhibited plastic strain energy,
Has energy absorption performance. Immediately after the ordinary steel p has yielded, the combined steel of the extremely low yield point steel q and the high tensile tension steel r has a higher energy absorption performance of the ordinary steel p than the above-mentioned combined steel, but the deformation (strain) is large. Then, the difference between them almost disappears, and in the event of a large earthquake, the same level of seismic performance as conventional seismic elements can be expected.

6 and 7 show an embodiment of the present invention.
Is a steel column, 2 is a steel beam, 3 is an orthogonal beam, 4 is an extremely low yield point steel wall panel, and 5 is a high tensile strength steel wall panel. (1) A wall panel is formed by alternately arranging ultra-low yield point steel wall panels 4 having a yield point of about 1.0 t / cm ² and high-strength steel wall panels 5 in the columns 1 and the beams 2. (2) At the time of a small-to-medium-sized earthquake, the ultra-low yield point steel wall panel 4 is plasticized, while the high-strength panel 5 is kept in the elastic region. (3) In the event of a large earthquake, the extremely low yield point steel wall panel 4 and the high-strength panel 5 are plasticized. Since the extremely low yield point steel panel 4 may yield at an early stage due to repeated stress and cause fatigue failure, it is detachably joined with high-strength bolts 6 so that it can be replaced in the event of a failure. ing. The high-strength steel wall panel 5 is provided with a stiffener 7 which prevents the high-tensile steel wall panel 5 and the entire wall plate from shearing buckling, and when the extremely low yield point steel panel 4 yields. Exhibits a stiffening effect.

As described above, the steel plate wall structure for a vibration damping structure of the present invention has a very low yield point steel wall panel and a high-tensile steel panel alternately arranged in the building frame as described above. It exerts plastic strain energy even during small and medium-scale earthquakes, reduces horizontal vibration of buildings, improves livability, and can exhibit stable and large plastic strain energy even during large earthquakes.

[Brief description of the drawings]

1A and 1B are hysteresis characteristic diagrams of a normal steel material and a composite material of an extremely low yield point steel and a high tensile steel which are subjected to a repetitive action of an axial force, respectively.

FIG. 2 is a stress-strain relationship diagram of a steel material.

FIG. 3 Axial loading history (-1.5 ‰ ≦ ε ≦ 1.5 ‰)
FIG.

FIG. 4 is an axial loading history (−3 ° ≦ ε ≦ 3 °) diagram.

FIG. 5 is an axial loading history (−30 ° ≦ ε ≦ 30 °).

FIG. 6 is a front view showing one embodiment of the steel plate wall structure for a vibration damping structure of the present invention.

FIG. 7 is a cross-sectional plan view of FIG.

[Explanation of symbols]

 Reference Signs List 1 steel column 2 steel beam 3 orthogonal beam 4 extremely low yield point steel wall panel 5 high tensile steel wall panel 6 high strength bolt 7 stiffener

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) E04B 2/56 E04H 9/02 321

Claims (1)

(57) [Claims] 1. A steel wall structure for a vibration control frame, wherein ultra-low yield point steel wall panels and high-tensile steel wall panels are alternately arranged in a building frame.