發(fā)布時(shí)間：2018-02-24 18:51

  本文關(guān)鍵詞： 空心高墩 搖擺隔震 碰撞效應(yīng) 地震反應(yīng)　出處：《蘭州交通大學(xué)》2014年碩士論文　論文類型：學(xué)位論文

【摘要】：在罕遇地震下，基底搖擺隔震橋墩可在橋墩與基礎(chǔ)的分離面處發(fā)生擺動(dòng)，，由擺動(dòng)過濾部分地震能量，以達(dá)到在地震中不僅可以保護(hù)基礎(chǔ)，同時(shí)又保護(hù)橋墩的目的。本文對(duì)基底搖擺隔震橋墩的地震反應(yīng)進(jìn)行研究，主要研究工作如下： (1)介紹了國內(nèi)外學(xué)者對(duì)基底隔震的研究成果，總結(jié)了減隔震控制類型及各自的特點(diǎn)。 (2)闡述了減隔震裝置的基本原理，介紹了減隔震體系的優(yōu)點(diǎn)，在強(qiáng)震來臨時(shí)，通過隔震層降低了地震動(dòng)對(duì)上部結(jié)構(gòu)的影響，上部結(jié)構(gòu)可以正常使用，確保建筑物在地震中的安全和震后無需修復(fù)，經(jīng)濟(jì)可行等特點(diǎn)。 (3)介紹了幾種主要碰撞模型的優(yōu)缺點(diǎn)，采用可以考慮碰撞過程中能量損失的Kelvin模型和Maxwell模型。建立了考慮碰撞效應(yīng)的基底搖擺隔震橋墩的計(jì)算模型及運(yùn)動(dòng)方程。分析了模型中連接彈簧剛度以及阻尼系數(shù)的計(jì)算方法與取值范圍。 (4)以新建鐵路大理至瑞麗線漾濞1號(hào)特大橋?yàn)楣こ瘫尘埃捎胢idas-civil有限元軟件建立了單墩分析模型，計(jì)算了結(jié)構(gòu)自振特性。 (5)對(duì)考慮碰撞效應(yīng)的基底搖擺隔震橋墩，進(jìn)行了罕遇地震作用下的非線性時(shí)程反應(yīng)分析，并分別與不考慮碰撞效應(yīng)的兩彈簧模型以及傳統(tǒng)的高墩模型進(jìn)行了比較。 (6)重點(diǎn)研究了Kelvin模型和Maxwell模型中彈簧剛度和阻尼系數(shù)的取值對(duì)搖擺隔震橋墩地震反應(yīng)的影響，分析了兩種模型在強(qiáng)震下地震反應(yīng)的差異。在兩彈簧模型的基礎(chǔ)上，提出了考慮碰撞效應(yīng)的基底搖擺隔震橋墩合理的減隔震分析模型。
[Abstract]:Under the rare earthquake, the base rocking isolated bridge pier can swing at the separate surface of the bridge pier and the foundation, and some seismic energy can be filtered by the swing, so that not only the foundation can be protected in the earthquake, At the same time, the purpose of protecting the pier is to study the seismic response of the base rocking isolated pier. The main research work is as follows:. 1) the research results of base isolation are introduced, and the control types and characteristics of base isolation are summarized. (2) the basic principle of the isolation device is expounded, and the advantages of the isolation system are introduced. When the strong earthquake comes, the influence of ground motion on the superstructure is reduced through the isolation layer, and the superstructure can be used normally. To ensure the safety of buildings in the earthquake and the characteristics of no need to repair after the earthquake, economic feasibility and so on. The advantages and disadvantages of several main collision models are introduced. Using Kelvin model and Maxwell model which can consider energy loss during collision, the calculation model and motion equation of base rocking isolated pier considering collision effect are established. The stiffness and damping system of connecting spring in the model are analyzed. The method of calculating the number and the range of the value. Taking Yangbi No. 1 Bridge from Dali to Ruili Line as the engineering background, the analysis model of single pier is established by using midas-civil finite element software, and the natural vibration characteristics of the structure are calculated. The nonlinear time-history response of the base rocking isolated pier considering the impact effect is analyzed and compared with the two spring model without collision effect and the traditional high pier model. (6) the influence of spring stiffness and damping coefficient on seismic response of rocking isolated bridge pier in Kelvin model and Maxwell model is studied, and the difference between the two models under strong earthquake is analyzed. A reasonable shock isolation analysis model for base rocking isolated bridge pier considering collision effect is proposed.
【學(xué)位授予單位】：蘭州交通大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：U441.3

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