地震作用下桥梁防碰撞及防落梁措施研究综述

发布时间：2018-04-25 10:06

本文选题：非同向振动 + 碰撞　；参考：《地震工程与工程振动》2017年02期

【摘要】：桥梁作为生命线工程的重要组成部分,一旦在地震中发生破坏,会造成巨大的经济损失和社会损失。地面上相邻的桥跨结构由于其动力特性存在差异及地震动输入的空间变化特性,地震发生时会引起相邻桥跨间的非同向振动,当桥跨间预留的间隙不能满足彼此的相对位移时就会发生相互碰撞,间隙过大时很容易引起落梁。针对相邻桥跨间的碰撞和落梁问题,对历次大地震中与碰撞和落梁相关的震害进行了回顾,介绍了纵桥向各种防碰撞与防落梁措施的研究现状,主要包括限位器、阻尼限位装置、模数式伸缩缝、减震装置以及组合限位装置五个方面。同时通过对研究现状的分析对以上各种防碰撞与防落梁措施的优点和缺点分别进行总结,进而对有待进一步研究的问题进行了展望。
[Abstract]:As an important part of lifeline engineering, bridge will cause huge economic loss and social loss once it is damaged in earthquake. Because of the difference of the dynamic characteristics and the spatial variation of the input of the ground motion, the earthquake will cause the nonisotropic vibration between the adjacent bridge spans. When the reserved clearance between bridge spans can not satisfy each other's relative displacement, there will be collision, and if the gap is too large, it is easy to cause beam drop. Aiming at the problems of collision and beam fall between adjacent bridge spans, this paper reviews the earthquake damage related to collision and beam drop in every major earthquake, and introduces the research status of various measures for preventing collision and falling beam in longitudinal bridge, mainly including locator. Damping limiter, modular expansion joint, shock absorber and combined limiter. At the same time, the advantages and disadvantages of all kinds of anti-collision and anti-drop beam measures are summarized through the analysis of the present research situation, and the problems to be further studied are prospected.
【作者单位】：石家庄铁道大学土木工程学院;石家庄铁道大学河北省大型结构健康诊断与控制重点实验室;
【基金】：国家自然科学基金项目(51508347,U1334209) 河北省高等学校科学技术研究项目(ZD2016021)~~
【分类号】：U442.55

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