摘要
地震作用下,结构的碰撞问题被认为是影响结构地震反应和结构抗震性能的一个重要因素,碰撞是一种非常复杂的非线性问题,其影响因素很多。采用非线性时程地震反应分析方法,探讨了横向地震作用下梁体与抗震挡块间的碰撞对连续梁桥地震反应的影响,结果表明:梁体与抗震挡块间的碰撞不仅产生很大的撞击力,还会导致桥墩的地震需求增大,对结构抗震不利。通过参数分析表明接触单元刚度、初始间隙以及墩高等参数对碰撞效应有很大影响。
The pounding between components of a structure has significant influences on the structural performance under earthquake. It is a complex nonlinear phenomenon involving many parameters. The nonlinear seismic responses of a model for a continuous girder bridge are evaluated. Pounding effects on seismic responses of continuous girder bridges between girder and retainer under transverse earthquake are investigated. The results indicate that pounding can lead to strong pounding force and amplify the responses of piers. It is shown that the pounding stiffness, gap distance and height of piers have significant influences on structural impact effects.
出处
《结构工程师》
2007年第2期64-68,79,共6页
Structural Engineers
关键词
地震作用
非线性
连续梁桥
碰撞效应
earthquake effect, nonlinear, continuous girder bridge, pounding effect
