本研究針對傳統隅撐構架不適裝置於較大跨距抗彎構架之問題，提出利用Y型隅撐構架，並搭配摩擦及挫屈控制機制作為改善方案。本研究以切削鋼板作為消能裝置，應用於具摩擦及挫屈控制機制之Y型隅撐構架，且分別進行反覆載重實驗，以界定其耐震性能。由構件實驗結果得知，切削鋼板消能裝置之非線性行為，主要受鋼板之寬厚比影響，另由構架試驗中可知，本研究提出之摩擦機制，可使整體構架於樓層位移比2%之內皆保持於彈性階段，且具有良好之消能能力，另外，搭配適當之消能隅撐，可有效提升構架最大強度，且可於消能隅撐挫屈之前，降低梁柱接頭之受力，延後梁端塑性鉸之形成，減少結構於震後之修復成本。本研究利用有限元素分析軟體ABAQUS分析構架之行為，可有效模擬構架系統之勁度、強度與消能容量，具有相當參考價值。;Traditional knee brace design can be used to enhance structural performance. However, the performance of such system becomes susceptible for structure with longer span. This study focused on the improvement of framed structures by adopting Y-shaped knee brace with friction and buckling mechanism. A series of cyclic loading tests were conducted on Y-shaped knee braced moment resisting frames (KBRF) with reduced section plates (RSP) to evaluate the seismic performance of the system. It was found from the component tests that the non-linear behavior of RSP was related to the width to thickness ratio of the plate. It was also observed from the frame tests that the frame could maintain elastic within 2% drift ratio. Test results validated that the strength of frame was effectively enhanced, the moment at the beam to column joints was substantially reduced and the formation of plastic hinges was effectively delayed. Finite element analyses using ABAQUS demonstrated the effectiveness of the proposed design method.
