本文選題：鉛芯橡膠支座 + 時程分析　； 參考：《吉林建筑大學》2014年碩士論文

【摘要】：橋梁是跨越河流、湖泊和其他障礙的架空構造物，用以保證公路、城市道路、鐵路等的暢通。作為生命線工程，一旦在地震中發(fā)生破壞將會給人們的生命財產造成巨大的損失。因此，對橋梁減隔震性能的研究具有十分重要的意義，通過在橋梁結構上設置減隔震支座和耗能裝置，從而來增加其抗震性能。 本文首先介紹了橋梁震害、設防標準，以及常用的減隔震支座，進而闡述了橋梁地震響應分析的基本理論，在此基礎上，本文以某實橋為工程實例，采用有限元軟件Midas建立了有限元模型并進行動力時程分析，研究其在地震中的動力響應規(guī)律。本文的研究內容主要包括： 1.依據動力學理論，應用有限元軟件，建立了橋梁的有限元計算模型。 2.對三跨連續(xù)梁橋分別采用球型鋼支座、板式橡膠支座以及鉛芯橡膠支座，并用非線性時程分析法計算該橋在三種地震波作用下的地震響應 3.為了研究鉛芯橡膠支座的減震性能，基于空間有限元模型，通過大量計算，從橋梁在三種支座下的地震響應來對比橋梁減震的差異，，并計算出其減震率，通過減震率的大小來判斷支座的減震效果。
[Abstract]:Bridges are overhead structures that span rivers, lakes, and other obstacles to ensure the smooth passage of roads, urban roads, railways, etc. As a lifeline project, once damage occurs in earthquake, it will cause huge loss of life and property. Therefore, it is of great significance to study the seismic isolation performance of bridges. In order to increase the seismic performance of bridges, isolation bearings and energy dissipation devices are installed on the bridge structure. This paper first introduces the earthquake damage of bridge, the standard of fortification, and the commonly used isolator, and then expounds the basic theory of seismic response analysis of bridge. On the basis of this, a real bridge is taken as an engineering example in this paper. The finite element model is established by using the finite element software Midas and the dynamic time history analysis is carried out to study its dynamic response law in earthquake. The main contents of this paper are as follows: 1. According to the theory of dynamics, the finite element model of bridge is established by using finite element software. 2. Three span continuous beam bridges are supported by ball steel, plate rubber and lead rubber respectively. The seismic response of the bridge under three kinds of seismic waves is calculated by nonlinear time-history analysis method. 3. In order to study the vibration absorption performance of lead rubber bearing, based on the spatial finite element model, through a large number of calculations, the difference of the seismic response of the bridge under the three supports is compared, and the damping rate of the bridge is calculated. The shock absorption effect of the bearing is judged by the magnitude of the damping rate.
【學位授予單位】：吉林建筑大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：U442.55

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