本文目的為探討鋼筋混凝土樓房結構在地震力作用下，梁柱桿件靠近接頭部分之非線性反應，並進一步研究加裝位移型增效式阻尼裝置對樓房減震與提升樓房耐震能力之效果。 研究內容分為三部分，第一部份為利用真實地震記錄之加速度歷時對鋼筋混凝土樓房結構進行彈性反應分析。第二部分則進行非線性歷時分析，觀察梁柱桿件進入非線性階段後之結構反應情形。第三部分為分析加裝位移型增效式阻尼裝置於鋼筋混凝土樓房結構之地震反應，以瞭解阻尼器消能之歷時過程與結構物之反應。 研究成果顯示： (1) 與傳統彈性分析比較，桿件進入非線性後產生大量變形，使各樓層最大相對位移比提高。但因桿件達到塑性階段產生消能作用，樓層總剪力得以降低。 (2) 經El Centro地震歷時分析結果顯示，加裝位移型增效式阻尼裝置於鋼筋混凝土樓房結構，能藉由阻尼器之消能作用有效降低結構物各樓層最大相對位移比達50%以上，並減少各樓層剪力達22%以上，故可使大部分桿件保持在彈性範圍，達到減震之目的。 (3) 由近斷層地震歷時分析結果發現，因地震力突然放大，使低樓層之最大樓層相對位移比與樓層總剪力無法有效降低，故位移型阻尼器較不適用於座落在近斷層地帶之鋼筋混凝土樓房。 The objective of the present study is to investigate the nonlinear responses of the RC building to ground motions. In addition, the effectiveness of vibration reductions of a RC building with the displacement-depended type damping system is also analyzed numerically. The contents of the studies are (1) to compute the maximum story drifts and the maximum shear in columns of the RC building to earthquakes by using the method of elastic time history analysis, (2) to compute the nonlinear responses of the RC building to earthquakes and (3) to understand the nonlinear responses and the damage states of the RC building with the displacement-depended type efficiency-enhanced damping system (D-type EDS) to earthquakes. It is found that (1) the maximum story drifts increased and the maximum shear in columns decreased by using nonlinear time history analysis as compared with the results obtained by linear analysis, (2) more than 50% of the maximum story drift reduction and 22% of the maximum shear in columns reduction can be achieved for the RC building with the D-type EDS to EL Centro earthquake and (3) the maximum story drifts and the maximum shear in columns of the lower stories of the RC building can’t be reduced effectively by using the D-tpye EDS in the case of the near fault earthquake excitations.
