减隔震连续梁桥地震反应分析

发布时间：2018-07-12 20:22

本文选题：连续梁桥 + 纤维截面　；参考：《重庆交通大学》2014年硕士论文

【摘要】：桥梁工程在生命线工程中扮演着重要的角色。多跨连续梁桥由于其受力的合理性，施工的方便性，在实际工程中得到广泛的应用，因而使得多跨连续梁桥的抗震设计也成为近来研究的热点。为桥梁加设减隔震装置是一种在桥梁抗震设计上普遍使用的方法，其中隔震支座由于其施工便捷，是工程设计中常考虑的减隔震方式。本文为研究减隔震连续梁桥在地震作用下的响应，做了以下工作： ①在总结现有连续梁桥抗震研究成果的基础上，运用Perform-3D软件，，桥墩以纤维单元模拟，对非隔震桥梁建立有限元模型，并运用动力时程分析方法，对该桥进行线性及非线性时程分析。 ②利用Perform-3D软件，桥墩以纤维单元建立模型，分析了不同隔震支座对该类桥型结构地震动力响应的影响和作用，并对比了仅考虑支座非线性与同时考虑支座与桥墩非线性的桥梁地震响应。本文在建立有限元模型时，桥墩均采用纤维截面模拟。为研究不同软件对于纤维截面模拟计算地震响应的差别，分别在Perform-3D软件与MIDAS/Civil软件中建立相同的单墩纤维模型，通过动力时程分析方法，对单墩模型进行地震响应分析，对比了二者纤维模型计算结果的差别。
[Abstract]:Bridge engineering plays an important role in lifeline engineering. Multi-span continuous beam bridge has been widely used in practical engineering because of its rationality of force and convenience of construction, so the seismic design of multi-span continuous beam bridge has become a hot topic recently. It is a widely used method in the seismic design of bridges to add the isolation device for the bridge. The isolation support is often considered in the engineering design because of its convenient construction. In order to study the seismic response of continuous beam bridges with seismic isolation, the following works have been done in this paper: 1 on the basis of summarizing the existing seismic research results of continuous beam bridges, Perform-3D software is used to simulate the pier with fiber element. The finite element model of non-isolated bridge is established, and the linear and nonlinear time-history analysis of the bridge is carried out by using dynamic time-history analysis method. (2) using Perform-3D software, the pier is modeled with fiber element. The influence and effect of different isolation supports on the seismic dynamic response of this kind of bridge structure are analyzed, and the seismic response of the bridge considering only the support nonlinearity and simultaneously considering the bearing and pier nonlinearity is compared. In this paper, the fiber section is used to simulate the pier when the finite element model is established. In order to study the difference of seismic response of different software to fiber section simulation, the same fiber model of single pier was established in Perform-3D software and Midas / Civil software, and the seismic response of single pier model was analyzed by dynamic time-history analysis method. The difference of calculation results between the two fiber models is compared.
【学位授予单位】：重庆交通大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U442.55

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