LRB隔震结构模型振动台试验研究(2)

An experimental study on shaking table of isolated structure model with LRB(2)

为研究大高宽比隔震结构的多维抗震性能,对一缩尺1∶4比例,两向高宽比分别为2.5和5的铅芯橡胶垫隔震结构模型进行了多向地震波输入下的振动台试验研究.试验分为小高宽比隔震结构模型双向地震波输入、大高宽比隔震结构模型三向地震波输入.通过输入不同大小和类型的地震波,分析隔震上部结构和隔震支座的地震反应.试验结果表明:各向地震波对结构反应将产生复杂的相互影响,当各向地震波发生峰值时刻接近时,这种影响更为显著.因此从安全考虑应该进行水平双向组合变形验算.

For research on multidimensional earthquake - resistance performance of the isolated structure with large height - width ratio, experimental study on shaking table of isolated structure model with lead lead - plug rubber bearing on a scale down of 1 ： 4 （ height - width ratio 2. 5 and 5 ） in multi - directional earthquake wave input has been conducted. The experiment is composed of two parts. The first part is isolated structure model experiment with small height-width ratio in two-direction earthquake input. The second part is isolated structure model experiment in three--direction earthquake wave input. Earthquake responses of isolated top structure and isolation bearing have been analyzed in earthquake wave put with different magnitudes and types. Experimental result indicts that each other complex influence of different direction on structure response was produced. And when their peak value fine is closed, the influence is especially obvious. So unitized checking for horizontal deformation of the bearing is requested considering safety factor.