隅撐抗彎構架相對於抗彎構架(MRF)有較高之勁度、強度及經濟性，相對於同心斜撐構架(CBF)又有較佳之韌性，更能使最大受力遠離梁柱接頭，為優良的耐震構架系統。為建立一套適用於隅撐抗彎構架之性能設計法，本研究使用性能設計法中的性能塑性設計法(Performance-based plastic design,PBPD)作為隅撐抗彎構架的設計方法，訂定其適用的性能目標及各性能等級下的表現。 本研究採用較易更換之隅撐桿件的降伏或挫屈來消散中小型地震所產生之能量。將三層、五層及十層之抗彎構架配置上不同尺度之隅撐，以非線性靜力分析法探討其塑鉸形成順序及整體強度，找出其適用隅撐尺度，再以非線性歷時分析法檢核之，作為多層多跨隅撐抗彎構架的設計參考。 而藉由性能塑性設計法設計多層多跨隅撐抗彎構架不僅簡化設計流程，分析之強度符合設計需求，塑鉸分佈較均勻，破壞情形也符合性能目標設定，是為可靠之設計方法。 Knee Braced Moment Resisting Frame (KBRF) is a modified form that adopts knee brace elements in the corner regions of beams and columns. The benefits of using the KBRFs include higher structural stiffness than moment resisting frame (MRF), and better ductility than concentrically braced frame (CBF). Furthermore, shifting of the plastic hinges from beam-column regions to the brace-beam regions eases the demand in beam-column joint designs. In order to establish the design guides for KBRF, a series of performance-based design that adopt the Performance-Based Plastic Design Method (PBPD Method) were conducted. The results from nonlinear static and nonlinear dynamic analyses show that the PBPD method effectively evaluated the design details for multi-story and multi-bay KBRF structures with pre-selected performance objectives in terms of yield mechanism and target drift. Therefore, the application of PBPD method in KBRF design is justified.
