多樓層未加勁鋼板剪力牆之耐震設計研究

本研究透過數值分析方法對於多樓層鋼板剪力牆耐震設計進行一系列的探討。本文首先探討鋼板剪力牆底層邊界柱容量設計，透過有限元素模型的非線性側推分析證實所提方法可有效地防止塑鉸在柱頂產生，進而避免剪力牆底層產生軟層機構。本研究採美國洛杉磯市的工址反應譜分別設計6、12與20層樓的鋼板剪力牆結構，再以20組475年回歸期地震的地表加速度歷時對其數值板條模型進行非線性歷時分析，探討多樓層鋼板剪力牆的動態反應。本文最後依據歷時分析的統計結果提出多樓層鋼板剪力牆邊界柱軸力需求的估算公式，以供工程界設計參考之用。

關鍵字

鋼板剪力牆；多樓層鋼板剪力牆；容量設計；耐震設計

並列摘要

This research conducted a series of numerical investigations on the seismic behavior and design of the multi-story steel plate shear wall (SPSW) buildings. This paper firstly proposes a new capacity design method for the bottom column of the SPSW to avoid the plastic hinge forming at the top end of the bottom column. The effectiveness of the proposed method has been verified by using nonlinear pushover analyses with three-dimensional finite-element shell models. In this research, several 6-, 12- and 20-story SPSWs were designed considering the U.S. code-prescribed design spectrum for the site in Los Angeles. The numerical strip models for these designs were constructed using computer software PISA3D. In order to investigate the dynamic responses of the multi-story SPSWs under the 10/50 level earthquakes, nonlinear response history analyses using a suite of the 20 scaled ground motions were conducted on each strip model. Comparing the dynamic responses of the boundary columns and beams with the estimated static maximum demands, which is derived from the force equilibrium in the plastic mechanism of the SPSWs subjected to the first-mode lateral force distribution, it can be found that the estimated static maximum demands overestimated the dynamic column axial forces. Statistical analytical results were employed to develop the equations for estimating the dynamic column axial forces in the multi-story SPSW.

並列關鍵字

steel plate shear wall ； multi-story steel plate shear wall ； capacity design ； seismic design

國際替代計量

多樓層未加勁鋼板剪力牆之耐震設計研究

全文下載

主題瀏覽