靜力側推分析考慮高模態之影響

Abstract

目前用靜力分析法，大多只考慮第一個模態的影響，而大部分不考 慮高模態的影響，但隨著非對稱結構物的增加，高模態的影響也日趨重要。 而對於結構非線分析方法來說，本論文分別使用2D 程式和3D 程 式，並以振態側推分析法(Modal Pushover Analysis)分別考慮其高模態的影響，並討論高模態對結構位移的貢獻及考慮高模態後，其結果與動力分析之成果相互比較。 另一方面，本論文亦將會以勁度分配的觀念，使用2D 的程式模擬 扭矩模態對結構物位移之貢獻，並討論有意外偏心之建築物其扭矩模態對其結構之造成之影響。

At present with the static analytic method, mostly one only considers the first mode effect. The high mode effect is also important for the unsymmetrical structures. Regarding the structural nonlinear analysis method, this thesis employs the 2D program and the 3D program. Also, the programs are used to do the Modal Pushover Analysis with consideration of high mode effect. The high mode contribution to the structural displacements is considered and the results are compared with that of dynamic nonlinear analysis of structures. Also, this thesis will employ stiffness distribution idea, to use 2D program to simulate torsion mode of the structure the torsion mode effect will be discussed.