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Seismic Response Control of a Soft First-Story Building
Yasuhiro Hayabe and Yuichi Watanabe
Design Division, Taisei Corporation, 1-25-1 Nishi-shinjuku, Shinjuku-ku, Tokyo 163-0606, Japan
Received:May 1, 2009Accepted:June 22, 2009Published:June 1, 2009
Keywords:soft-first-story, passive response control, slender building, PΔ-effect
Abstract
A structure with a building plane 7.75 × 8.35 m, 47.8 m high, and having a height/width aspect ratio exceeding 6 has a building response that is difficult to control in both seismic and wind loading. We therefore changed the vibration mode from rocking to swaying by softening first-story translation stiffness and concentrating building deformation to make the first story energy-absorbing. The soft first-story structure we introduce involves (1) stiffening the structure above the second story, (2) making first-story columns laterally flexible and axially rigid, and (3) developing a response-hardening oil damper. The sections below detail these structural elements and dynamic response control performance against wind and seismic loading through time-history response analysis.
Cite this article as:Y. Hayabe and Y. Watanabe, “Seismic Response Control of a Soft First-Story Building,” J. Disaster Res., Vol.4 No.3, pp. 239-245, 2009.Data files:
References- [1] W. F. Chen and E. M. Lui., “STRUCTURAL STABILITY TheoryAnd Implementation,” Prentice-Hall, Inc., NJ, U.S.A., 1987.
- [2] Architectural Institute of Japan, “Recommendations for the Plastic Design of Steel Structure,” 1975.
