本研究以部分韌性低矮RC構架為對象,進行非線性動力分析之研究。首先以Takeda遲滯模式模擬RC構架之塑性鉸,建立單層雙跨鋼筋混凝土(RC)構架之有限元素模型,進行動力非線性歷時分析。動力分析結果與該RC構架之振動台試驗結果分析比較,配合參數之敏感度分析,以驗證Takeda遲滯模式模擬部分韌性低矮RC構架受震行為之可靠性及優缺點,並對模型參數提出建議。針對位移、基底剪力、遲滯迴圈、遲滯能及損傷指標(Damage Index)等工程設計、評估常用之參數,進行分析比較。本研究並選取台北盆地內數個實測之地震紀錄為輸入地震力,進行RC構架非線性動力分析。研究RC構架之性能表現,統計位移、基底剪力、遲滯能及損傷指標等參數與地震強度之關係。本研究成果可作為結構物耐震評估的參考。
The objective of this study is to investigate the nonlinear dynamic response of partial ductile low-rise RC frame subjected to earthquake ground motions. The structure is modeled as nonlinear frame elements with lumped plasticity by defining plastic hinges at both ends of the beams and columns. The Takeda hysteretic model is adopted to simulate the plastic hinge of the RC frame. The experiments of shaking table test of a RC-frame, subjected to a real ground motion recorded during the 1999 Taiwan Chi-Chi earthquake, are used for verification of the nonlinear dynamic response analysis. This study focuses on the results which are related to engineering parameters: maximum displacement, inter-storey drift ratio, base-shear, hysteretic energy, and damage index. Parametric studies on the parameters of the Takeda hysteretic model are conducted to verify the accuracy of nonlinear structural modeling. Two groups of ground motions collected from different site conditions are used as the inputs to study the site effects on the nonlinear dynamic response of the low-rise RC frame based on the statistic analysis.