減隔震連續(xù)梁橋地震反應(yīng)分析
本文選題:連續(xù)梁橋 + 纖維截面 ; 參考:《重慶交通大學(xué)》2014年碩士論文
【摘要】:橋梁工程在生命線工程中扮演著重要的角色。多跨連續(xù)梁橋由于其受力的合理性,施工的方便性,在實際工程中得到廣泛的應(yīng)用,因而使得多跨連續(xù)梁橋的抗震設(shè)計也成為近來研究的熱點。為橋梁加設(shè)減隔震裝置是一種在橋梁抗震設(shè)計上普遍使用的方法,其中隔震支座由于其施工便捷,是工程設(shè)計中?紤]的減隔震方式。 本文為研究減隔震連續(xù)梁橋在地震作用下的響應(yīng),做了以下工作: ①在總結(jié)現(xiàn)有連續(xù)梁橋抗震研究成果的基礎(chǔ)上,運用Perform-3D軟件,,橋墩以纖維單元模擬,對非隔震橋梁建立有限元模型,并運用動力時程分析方法,對該橋進行線性及非線性時程分析。 ②利用Perform-3D軟件,橋墩以纖維單元建立模型,分析了不同隔震支座對該類橋型結(jié)構(gòu)地震動力響應(yīng)的影響和作用,并對比了僅考慮支座非線性與同時考慮支座與橋墩非線性的橋梁地震響應(yīng)。 本文在建立有限元模型時,橋墩均采用纖維截面模擬。為研究不同軟件對于纖維截面模擬計算地震響應(yīng)的差別,分別在Perform-3D軟件與MIDAS/Civil軟件中建立相同的單墩纖維模型,通過動力時程分析方法,對單墩模型進行地震響應(yīng)分析,對比了二者纖維模型計算結(jié)果的差別。
[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.
【學(xué)位授予單位】:重慶交通大學(xué)
【學(xué)位級別】:碩士
【學(xué)位授予年份】:2014
【分類號】:U442.55
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