高墩大跨径曲线刚构—连续组合梁桥动力弹塑性地震分析
发布时间：2018-09-11 16:38
【摘要】：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。
[Abstract]:In this paper, the long-span curved rigid-frame continuous composite beam bridge with high piers is taken as the research object. By means of dynamic elastic-plastic time-history analysis, the influence of different parameters on the dynamic characteristics and seismic response of this kind of bridge structure is studied. It can provide technical support for preliminary design and seismic type selection and dynamic elastoplastic checking calculation of this kind of bridges. The effects of the boundary simulation method of pile-soil interaction, the radius of curvature and the stiffness distribution coefficient of the pier on the dynamic characteristics of the structure are compared, and the frequency, period and vibration mode sequence of the structure are listed. The basic period of X and Y direction of relative error of frequency and the influence of mode shape on mass coefficient are discussed. The effects of input component of ground motion, radius of curvature, stiffness distribution coefficient of bridge pier and plastic hinge simulation method on the seismic response of the structure are compared, and the influence laws of the moment of bridge pier, the displacement of pier top and the response of internal force of main beam are compared respectively.
【学位授予单位】：长安大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U441.3
本文编号：2237238
[Abstract]:In this paper, the long-span curved rigid-frame continuous composite beam bridge with high piers is taken as the research object. By means of dynamic elastic-plastic time-history analysis, the influence of different parameters on the dynamic characteristics and seismic response of this kind of bridge structure is studied. It can provide technical support for preliminary design and seismic type selection and dynamic elastoplastic checking calculation of this kind of bridges. The effects of the boundary simulation method of pile-soil interaction, the radius of curvature and the stiffness distribution coefficient of the pier on the dynamic characteristics of the structure are compared, and the frequency, period and vibration mode sequence of the structure are listed. The basic period of X and Y direction of relative error of frequency and the influence of mode shape on mass coefficient are discussed. The effects of input component of ground motion, radius of curvature, stiffness distribution coefficient of bridge pier and plastic hinge simulation method on the seismic response of the structure are compared, and the influence laws of the moment of bridge pier, the displacement of pier top and the response of internal force of main beam are compared respectively.
【学位授予单位】：长安大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U441.3
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