高墩大跨径曲线刚构-连续组合梁桥动力弹塑性地震分析-建筑与土木工程专业论文.docxVIP

摘 要 万方数据 本文以高墩大跨径曲线刚构-连续组合梁桥为研究对象，通过动力弹塑性时程分析， 研究不同的参数对该类桥梁结构的动力特性以及地震响应的影响规律，可为该类桥梁进 行初步设计抗震选型以及抗震动力弹塑性验算提供技术支持。 分别比较桩土相互作用边界模拟方法、曲率半径、桥墩刚度分配系数对结构动力特 性的影响，列出了对结构的频率、周期、振型先后顺序、频率相对误差、X 方向和 Y 方 向的基本周期、振型参与质量系数等参数的影响规律。 分别比较地震动输入分量、曲率半径、桥墩刚度分配系数、塑性铰模拟方法对结构 地震响应的影响，分别比较了桥墩弯矩、墩顶位移和主梁内力响应的影响规律。 关键词：刚构-连续组合梁桥、高墩大跨径、动力弹塑性分析、桩土相互作用、桥 墩刚度分配系数、地震动输入分量 I Abstract Taking a high pier and long span curve rigid frame-continuous combination bridge as the research object ，through dynamic elastic-plastic analysis to study different parameters influenting this type of bridge of the dynamic characteristics and seismic response. This can provide technical support as the selection of preliminary design of earthquake seismic and the checking of seismic dynamic elastoplastic for this type of bridge. Respectively comparing of different pile-soil interaction boundary simulation method、 different radius of curvature、different pier stiffness distribution coefficient that influence on the structure dynamic characteristics. Listing the influence on structure frequency、period、 modal sequence、frequency relative error、X direction and Y direction basic period、modal participation mass coefficient. Comparison of the seismic input component、the radius of curvature、the pier stiffness distribution coefficient and the impact of different methods for simulation of plastic hinge structure seismic response，compared the influence on the pier moment、pier top displacement and the main beam internal forces response . Key words：Rigid frame-continuous combination bridge; High pier and long span; Dynamic elastic-plastic analysis; Pile-soil interaction; Pier stiffness distribution coefficient; Seismic input component II  目 录  HYPERLINK \l _bookmark0 第一章 绪 论 ..................................................................................................................... 1  HYPERLINK \l _bookmark1 1.1 桥梁震害分析及启示 ...................................................................................