本文選題：搖擺隔震 + 擬靜力試驗(yàn)�。� 參考：《蘭州交通大學(xué)》2015年碩士論文

【摘要】：近年來(lái),基底隔震技術(shù)因其潛在的良好的隔震性能成為國(guó)內(nèi)外的研究熱點(diǎn)。本文基于擬靜力試驗(yàn)方法研究了鐵路樁基礎(chǔ)搖擺隔震橋墩的抗震性能,并采用Pushover分析方法對(duì)搖擺隔震橋墩進(jìn)行了抗震性能分析。主要研究工作包含以下幾個(gè)方面:(1)回顧了國(guó)內(nèi)外抗震設(shè)計(jì)理念的發(fā)展,闡述了搖擺隔震設(shè)計(jì)的優(yōu)越性;對(duì)國(guó)內(nèi)外學(xué)者采用理論計(jì)算、試驗(yàn)研究、數(shù)值模擬等方法在搖擺隔震領(lǐng)域的取得的研究成果進(jìn)行了總結(jié),介紹了若干個(gè)已經(jīng)將搖擺隔震理念應(yīng)用于工程實(shí)踐中的橋梁。(2)設(shè)計(jì)了三種樁基礎(chǔ)搖擺隔震橋墩試驗(yàn)?zāi)Ｐ?分別為無(wú)約束自由搖擺模型、墩底和承臺(tái)兩側(cè)設(shè)置限位鋼筋的模型、在墩頂和承臺(tái)底中心設(shè)置預(yù)應(yīng)力防傾覆鋼筋的模型。制訂了搖擺隔震橋墩的擬靜力試驗(yàn)方案,制作了試驗(yàn)?zāi)Ｐ筒⒋_定了加載制度與數(shù)據(jù)采集等方案。(3)對(duì)模型進(jìn)行了擬靜力試驗(yàn),描述并分析了試驗(yàn)中觀察到的現(xiàn)象。通過(guò)對(duì)試驗(yàn)數(shù)據(jù)的分析,獲得了試驗(yàn)?zāi)Ｐ偷臏厍�、骨架曲線、耗能曲線、強(qiáng)度和剛度特性等抗震性能參數(shù),對(duì)參數(shù)進(jìn)行了分析,并對(duì)三種模型的試驗(yàn)數(shù)據(jù)進(jìn)行了對(duì)比,對(duì)其抗震性能進(jìn)行了比較,獲得了一些有益的結(jié)論。(4)通過(guò)有限元分析軟件對(duì)三種試驗(yàn)?zāi)Ｐ瓦M(jìn)行了數(shù)值模擬,并采用靜力彈塑性Pushover方法對(duì)模型進(jìn)行了抗震性能分析,獲得了模型的骨架曲線、搖擺-提離特性、限位鋼筋和防傾覆鋼筋的彈塑性變形特性等參數(shù)。對(duì)三種有限元模型的分析結(jié)果進(jìn)行了對(duì)比,總結(jié)了各模型搖擺隔震性能的優(yōu)、缺點(diǎn)。(5)將Pushover分析得出的骨架曲線與擬靜力試驗(yàn)獲得的骨架曲線進(jìn)行了對(duì)比,驗(yàn)證了搖擺隔震橋墩數(shù)值計(jì)算模型的可靠性。
[Abstract]:In recent years, the base isolation technology has become a research hotspot at home and abroad because of its potential good isolation performance. In this paper, the seismic behavior of rocking isolated pier of railway pile foundation is studied based on pseudo-static test method, and the seismic behavior of rocking isolated pier is analyzed by using Pushover analysis method. The main research work includes the following aspects: (1) reviewing the development of aseismic design concept at home and abroad, expounding the superiority of rocking isolation design, using theoretical calculation and experimental research to domestic and foreign scholars, The research results obtained by numerical simulation in the field of rocking isolation are summarized. Several bridges that have applied rocking isolation concept to engineering practice are introduced. Three test models of rocking isolated pier for pile foundation are designed. They are the unconstrained free swinging model, the model of limited reinforcement on the bottom of pier and both sides of cap, and the model of prestressed anti-overturning steel bar at the top of pier and the center of bottom of cap. The quasi-static test scheme of rocking isolated bridge pier is worked out, the test model is made and the loading system and data collection scheme are determined. The quasi-static test of the model is carried out, and the phenomena observed in the test are described and analyzed. By analyzing the test data, the hysteretic curve, skeleton curve, energy dissipation curve, strength and stiffness characteristics of the test model are obtained, and the parameters are analyzed, and the test data of the three models are compared. The seismic behavior of the model is compared, and some useful conclusions are obtained. The numerical simulation of the three test models is carried out by using the finite element analysis software, and the seismic behavior of the model is analyzed by using the static elastoplastic Pushover method. The parameters of the model, such as the skeleton curve, the rocking and lifting characteristics, the elastic-plastic deformation characteristics of the limited steel bar and the anti-overturning steel bar, are obtained. The analysis results of three finite element models are compared, and the advantages and disadvantages of each model are summarized. (5) the skeleton curve obtained by Pushover analysis is compared with the skeleton curve obtained by pseudostatic test. The reliability of the numerical model of rocking isolated bridge pier is verified.
【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】：2015
【分類號(hào)】：U442.55

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相關(guān)期刊論文 前1條

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本文編號(hào)：1912304