鋼造實尺寸二層樓雙核心自復位斜撐構架耐震試驗與有限元素分析

Abstract

雙核心自復位斜撐在斜撐試驗中已證明擁有量好的自復位能力，並且有一套能夠準確預測斜撐軸向行為的理論。本研究首次將兩支雙核心自復位斜撐同時使用於二層樓構架中進行耐震試驗，在經過7次試驗之後，雙核心自復位斜撐構架無任何損壞，過程中梁端部也無發生局部挫屈現象。且各階段試驗結束後構架最大殘餘變形也僅有試體總高的0.15 %，自復位行為非常良好。本研究也使用了有限元素分析軟體ABAQUS對試驗試體進行有限元素分析比較，分析結果顯示構架最大力量與試驗僅有約5 %的差距，殘餘變形與試驗有約10 %的差距，其位移不到樓層總高的0.01 %，表示有限元素模型能夠準確地對雙核心自復位斜撐構架進行模擬。

Dual-Core Self-Centering Brace (DC-SCB) in past tests has proved have good Self-Centering capability, and a theory can accurately predict axial behavior. For the first time, This study use two DC-SCBs in a two-story frame to do the test. During 7 tests, DC-SCBF has no failure, beam end did not buckle. Maximum residual deformation of 7 tests is 0.15% of 2nd floor drift. This study also use finite element program ABAQUS to do finite element analyses for the specimen. Analyses result shows about 5% error in maximum force and 10% error in residual deformation from the test. ABAQUS model can accurately simulate DC-SCB behaviors.