摘要
为探讨大跨度悬索桥梁抗震设计理论问题,利用基于大质量法的多支承激励运动方程,研究非线性多支承激励地震响应,分析桩-土-结构相互作用对动力特性和地震反应的影响,以及行波效应对地震反应的影响。分析表明,主塔为嵌岩桩时,考虑桩基础的桩-土-结构相互作用后会使结构的内力反应减小,行波效应对结构内力反应影响不大,加劲梁与边梁在主塔下横梁支承处的纵向相对位移可达0.6 m。
In order to investigate theoretical issues in wind and earthquake resistance design of large-span suspension bridges,this paper studies the response of nonlinear multi-support excitation to earthquake by means of motion equations of multi-support excitation based on the large-mass method（LMM）,and analyzes impacts of interactions of pile-soil-structure on dynamic properties and seismic response and influences of traveling wave effect on seismic response.In accordance with the analysis of the paper,the traveling wave effect does not have great influence on response of internal force of structure since the interactions of pile-soil structure in consideration of pile foundation will reduce the response of internal force of structure when the socketed pile is employed for main tower,and the longitudinal relative displacement between reinforced beam and side beam at supporting place of lower transverse beam of main tower can be up to 0.6 m.
出处
《公路交通技术》
2011年第3期60-62,71,共4页
Technology of Highway and Transport
关键词
地震
悬索桥
有限元
动力反应
earthquake
suspension bridge
finite element
dynamic response
