桥墩结构形式对大跨连续刚构桥抗震性能影响分析

发布时间：2018-09-10 10:24

【摘要】：以大准铁路增二线某大跨度连续刚构桥为工程背景,利用Midas/Civil建立有限元模型,比较单薄壁实心墩、独柱圆形实心墩、双薄壁实心墩三种桥墩对连续刚构桥抗震性能的影响。计算结果表明:单薄壁实心墩、独柱圆形实心墩、双薄壁实心墩对应结构自振频率依次增大,单薄壁实心墩与独柱圆形实心墩以桥面振动为主,而双薄壁实心墩以桥墩弯曲为主。同时,在横桥向地震波作用下,独柱圆形实心墩桥梁墩顶位移与中跨跨中位移峰值最小,双薄壁实心墩桥梁墩底剪力峰值最小;在纵桥向地震波作用下,双薄壁实心墩桥梁墩底剪力、墩顶位移与中跨跨中位移峰值最大,独柱圆形实心墩峰值最小。
[Abstract]:Taking a large span continuous rigid frame bridge on the second line of the large quasi-railway as the engineering background, the finite element model is established by using Midas/Civil, and the effects of three kinds of piers on the seismic performance of the continuous rigid frame bridge are compared between the single thin-walled solid pier, the single column circular solid pier and the double thin-walled solid pier. The results show that the natural vibration frequencies of single thin-walled solid pier, single cylindrical circular solid pier and double thin-walled solid pier increase in turn, and the vibration of bridge deck is dominant between single thin-walled solid pier and single-column circular solid pier. And the double thin-wall solid pier is mainly curved bridge pier. At the same time, under the action of transverse bridge seismic wave, the peak value of pier top displacement and mid-span displacement of single column circular solid pier bridge is minimum, and the peak value of shear force at the bottom of pier of double-thin-walled solid pier bridge is the minimum, and under the action of longitudinal bridge seismic wave, The shear force at the bottom of double thin-walled solid pier bridge is the largest, the peak value of pier top displacement and mid-span displacement is the largest, and the peak value of single column circular solid pier is the smallest.
【作者单位】：天津城建大学土木工程学院;
【基金】：天津市自然基金重点项目(12JCZDJC28900) 天津市科技兴海项目(KJXH2012-19)
【分类号】：U442.55

【共引文献】