新世代鋼結構耐震性能提升設計研發及驗證-具可調勁度斜撐之高性能鋼結構耐震設計研發及驗證(子計畫二)(II)

Steel structures possess high strength and significant ductility, thus are effectivestructural forms for earthquake-resistant designs. Structural designs using specialmoment resisting frames (SMRF) are usually considered when high ductility isrequired. In order to enhance the seismic performance of the structures, animproved brace design that incorporated steel hook dampers and segmentalbrace members to form an adjustable-stiffness brace was proposed. Test resultsobtained from on-going investigation on the cyclic behavior of steel hookdampers and adjustable-stiffness braces validated the effective performance ofthe designs. This study aims to extend the findings on the significant performanceof the above-mentioned devices to the seismic designs of steel framedstructures. A series of cyclic loading tests on framed structures with steel hookdampers and adjustable-stiffness braces and subsequent seismic evaluation onmulti-bay-multi-story structures will be conducted. Experimental and analyticalresults will be used to evaluate the frame strength, structural stiffness and thestructural ductility so that the efficiency of the proposed strengthening scheme inseismic performance improvement can be justified.