SMA绞线-叠层橡胶复合支座振动台试验研究

对一组SMA绞线-叠层橡胶复合支座进行了振动台试验。根据试验结果比较分析了SMA绞线-叠层橡胶复合支座与普通叠层橡胶支座的隔震性能,着重分析了位移幅值对支座工作性能基本参数如等效水平刚度、最大恢复力、单位循环耗能和等效阻尼比的影响以及这些参数的变化规律。从而证明了在罕遇地震作用下发生较大水平位移幅值时,SMA绞线-叠层橡胶复合支座比普通叠层橡胶支座可提供更大的恢复力和阻尼,更有利于阻隔地震对上部结构的作用和强震作用后上部结构的自动复位。

The shaking table test of an SMA strands-composite bearing

The seismic isolation effectiveness,such as displacement,equivalent horizontal stiffness,max-restoring force,dissipation per loop and equivalent damping ratio of the SMA strands-composite bearing is analyzed and compared with laminate rubber bearing,through the results of the shaking table test on them.Thus the authors prove that the SMA strands-composite bearing can provide more restoring force and damping,in favor of obstructing the transmission of seismic force from the bottom to the upper of structure and automatic resetting of the super structure,when strong earthquakes occur.