Tensile test of home-made Ni-Ti SMA bars are conducted, the parameters of the built-in SMA model of ABAQUS are determined by curve fitting of tested stress-strain data. The SMA seismic restrainer is further designed based on Japanese bridge seismic specification and the tested stress-strain data. Finite element model of a three span simply supported bridge is further established in ABAQUS. Time-history analysis is carried out to investigate effectiveness of SMA seismic restrainers. Parameter studies are further carried out, the effects of restrainer length and initial gaps are studied. The comparison of the SMA restrainer and the traditional steel cable restrainer are made. The simulated results show that the relative displacement between bridge girder and pier and pounding between two bridge girders would decrease as SMA restrainer length and initial gap decreases; however the shear force at pier bottom would increase. SMA restrainer is better than steel cable restrainer for the control of bridge girder pounding and relative displacement.
周海俊，徐希，刘海锋. 简支梁桥形状记忆合金装置减震防落研究[J]. 振动与冲击, 2015, 34(21): 194-199.
ZHOU Hai-jun, XU Xi, Liu Hai-feng. Study of shape memory alloy restrainers for unseating prevention of simply supported bridge #br#. JOURNAL OF VIBRATION AND SHOCK, 2015, 34(21): 194-199.
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