高墩简支梁桥的非线性时程分析

Nonlinear time-history analysis of simple-supported bridge with high piers

文章研究了高墩简支桥梁在高烈度地震作用下的位移反应和橡胶支座对墩顶位移的影响,对不同高度的桥墩进行非线性时程分析,分析表明高墩简支桥梁整体呈现出柔性结构特点,在高烈度地震作用下会产生较大的墩顶位移。随着墩高的增加,起隔震作用的橡胶支座的变形在墩顶总位移中的比例越来越小,其隔震效果随墩高增加而降低。

Several piers of different height have been analyzed through nonlinear time-history analysis method. The research objects are the displacement of the top of high piers and the rubber isolator affect to the piers displacement during high earthquake intensity motion. The result show that the high piers bridges has low stiffness. The top of piers make large displacement during the high earthquake intensity motion. And as the height of piers increase the efficiency of rubber isolator become lower.