Analysis of seismic responses of SMA-friction three-dimensional isolated system
ZHANG Zhenhua
BAI Jie
WANG Qinting
SHENG Piao
Abstract：In order to study the seismic responses of structure under near-filed strong earthquake,a three-dimensional isolator consisted of SMA and friction elements(3DSMAFBI) is proposed.The Newmark method and Modified Newton-Raphson iteration method are used to solve the dynamic equations of interlayer of the structure isolated with SMA-friction isolator.Theresults of seismic responses show that when the peak value of seismic wave accelerates in horizontal direction is close to the one in vertical direction,the force-displacement relations of isolation layer with and without vertical component of earthquake are significant difference.Therefore,the vertical component can't be ignored.When the vertical natural periods of superstructure increases,the base axial force and base shear of the structures decreases significantly,whereas,the vertical natural periods of superstructure have weak influence on the peak of displacement of superstructure.Through study of the isolation structure,the parameters of SMA-friction three dimensional isolation structure are determined,and then the seismic responses of the structure with no isolation are compared.The SMA-friction horizontal isolation and three dimensional isolation,the results show that SMA-friction three-dimensional isolator exhibit significant isolation effects on the structure in horizontal direction and vertical direction.
Keywords：three-dimensional isolated systemshape memory alloyfrictionseismic respons
Publication Date：2017-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：7( 106-112 )