隅撐構件的配置可大幅提升構架系統之強度及勁度，並可將主要受力部位從梁柱接頭移至隅撐與梁構件接合處，此不僅可減緩抗彎構架接頭處發生破壞的問題，亦可節省接頭之設計成本，一般而言，此構架之設計係將接合板(gusset plate)銲接於梁柱構件上，再將隅撐構件以栓接或銲接方式連接於接合板上。依現行接合板設計之構架而言，其需要大量的銲接，再者，隅撐構件挫屈後，將造成接合板之非彈性變形，需將接合板切除，才得以更換新的隅撐構件，其修復甚為不便。緣此，本研究曾進行先期試驗，研擬一具有可更換、易施工、且具適當強度及變形能力之隅撐設計及接合方式，此設計經單跨、單層之構架反復載重試驗驗證，已初步確認其具有相當之結構性能改善功能。另就工程應用而言，由於真實結構通常為多跨多層之構架系統，當其配置上述隅撐構件時，由於構件上之力量傳遞路徑、隅撐對結構系統耐震性能影響規模及相關之結構設計參數均應與單跨單層之構架系統有所差異。為進一步確認隅撐構架系統在實際工程應用之可行性，本年度將針對配置隅撐構件之多跨多層構架系統進行反復載重試驗，藉由試驗結果評估此設計之耐震性能，推導可靠之隅撐構架系統力學分析模型，並建立隅撐鋼結構之設計準則及參考資訊。 Steel structures possess high strength and significant ductility, thus are effective structural forms for earthquake-resistant designs. Structural designs using special moment resisting frames (SMRF) are usually considered when high ductility is required. However, applications of such designs are sometimes limited when story drift is a concern. In order to improve the seismic performance of the structures, a modified structure adopting knee braces, namely knee-braced moment resisting frame (KBRF), is proposed. The effectiveness of the KBRF is governed by the dimensions and the geometric placements of the knee braces. In order to adequately evaluate the performance of the KBRF, the relationships between the system and the knee braces must be defined. This study is focused on the performance evaluation of multi-dimensional KBRF structures with brace elements designed under controlled buckling mechanisms. A series of cyclic loading tests will be conducted on the multi-dimensional SMRF and KBRF structures with difference arrangement of knee elements to investigate their seismic behavior. Test results will be used to evaluate the seismic performance and to establish the design guides of the proposed KBRF structures. 研究期間：9908 ~ 10007
