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(子計畫一)(III)

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. Resultsobtained from cyclic loading tests of steel hook dampers, adjustable-stiffnessbraces and braced frames with the proposed braces will be used to evaluate theeffectiveness of the designs. This study aims to extend the findings on thesignificant performance of the above-mentioned devices to the seismic designs offramed structures. Performance evaluations on multi-bay-multi-story buildings willbe conducted using SAP2000 to validate the applicability of the proposed designto engineering practice. Experimental and analytical results will be used toevaluate the frame strength, structural stiffness and the structural ductility so thatthe efficiency of the proposed strengthening scheme in seismic performanceimprovement can also be justified.