限位墩墩顶伸缩缝间距对长联梁桥纵向抗震性能的影响
发布时间：2018-12-25 08:55
【摘要】：工程实践表明,限位墩可以大大降低长联梁桥落梁倒塌事故的发生,而限位墩墩顶伸缩缝尺寸对于长联梁桥纵向抗震性能具有较大的影响。为此,以有限元分析为手段,通过非线性分析方法研究伸缩缝间距对纵向地震作用下长联梁桥动力响应的影响。研究表明:随着间距的增加,主梁未出现碰撞或碰撞力呈现出下降的趋势,普通墩最大墩底弯矩没有呈现出特别明显的规律,而限位墩最大墩底弯矩主要受碰撞力的影响,其最大墩底弯矩的变化和墩顶最大碰撞力类似。普通墩墩梁的最大相对位移,最大碰撞力的大小以及最大墩底弯矩随伸缩缝间距的增大基本变化不大。
[Abstract]:The engineering practice shows that limited pier can greatly reduce the collapse of falling beam of long-link beam bridge, and the expansion joint size at the top of pier of limited pier has great influence on longitudinal seismic performance of long-link beam bridge. Therefore, by means of finite element analysis, the influence of expansion joint spacing on the dynamic response of long beam bridges under longitudinal earthquake is studied by nonlinear analysis method. The results show that: with the increase of spacing, the collision or collision force of the main beam does not appear a downward trend, the maximum pier bottom moment of the ordinary pier does not show a particularly obvious rule, while the maximum pier bottom moment of the limited pier is mainly affected by the impact force. The variation of bending moment at the bottom of the pier is similar to the maximum impact force on the top of the pier. The maximum relative displacement, the maximum impact force and the maximum bending moment at the bottom of common piers have little change with the increase of joint spacing.
【作者单位】： 重庆交通大学土木工程学院;招商局重庆交通科研设计院;
【基金】：重庆市博士后基金项目(Xm2015066) 交通运输部建设科技项目(2013318800020) 中央高校基本科研业务费资助项目(310821161120) 山东省优秀中青年科学家科研奖励基金项目(2014BSE28027)
【分类号】：U442.55
本文编号：2390960
[Abstract]:The engineering practice shows that limited pier can greatly reduce the collapse of falling beam of long-link beam bridge, and the expansion joint size at the top of pier of limited pier has great influence on longitudinal seismic performance of long-link beam bridge. Therefore, by means of finite element analysis, the influence of expansion joint spacing on the dynamic response of long beam bridges under longitudinal earthquake is studied by nonlinear analysis method. The results show that: with the increase of spacing, the collision or collision force of the main beam does not appear a downward trend, the maximum pier bottom moment of the ordinary pier does not show a particularly obvious rule, while the maximum pier bottom moment of the limited pier is mainly affected by the impact force. The variation of bending moment at the bottom of the pier is similar to the maximum impact force on the top of the pier. The maximum relative displacement, the maximum impact force and the maximum bending moment at the bottom of common piers have little change with the increase of joint spacing.
【作者单位】： 重庆交通大学土木工程学院;招商局重庆交通科研设计院;
【基金】：重庆市博士后基金项目(Xm2015066) 交通运输部建设科技项目(2013318800020) 中央高校基本科研业务费资助项目(310821161120) 山东省优秀中青年科学家科研奖励基金项目(2014BSE28027)
【分类号】：U442.55
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