發(fā)布時(shí)間：2018-10-14 14:04

【摘要】：摘要： 高速鐵路建設(shè)方興未艾,橋梁結(jié)構(gòu)作為鐵路網(wǎng)建設(shè)的重要組成部分,認(rèn)識(shí)其在地震作用下的抗震性能,對(duì)于災(zāi)后救援工作的開(kāi)展和維修加固工作具有重要意義。本文以高速鐵路簡(jiǎn)支梁橋橋墩為研究對(duì)象,開(kāi)展了橋墩抗震性能試驗(yàn)、有限元數(shù)值模擬分析、地震損傷性能分析、性能水準(zhǔn)的定義和延性抗震能力評(píng)估方法等方面的研究,主要完成了以下工作： 1、進(jìn)行了高速鐵路圓端形橋墩縮尺模型的低周反復(fù)荷載加載試驗(yàn),從破壞模式、滯回曲線、承載能力、延性性能、剛度退化效應(yīng)和殘余位移等方面,研究了剪跨比、配筋率和配箍率等參數(shù)對(duì)橋墩抗震性能的影響規(guī)律。 2、采用OpenSees進(jìn)行了橋墩模型的有限元數(shù)值模擬,建立了低周反復(fù)荷載作用下的纖維單元模型,并通過(guò)試驗(yàn)數(shù)據(jù)驗(yàn)證了模型的有效性。 3、系統(tǒng)比較了已有的鋼筋混凝土結(jié)構(gòu)地震損傷模型,對(duì)改進(jìn)的剛度退化模型、Mander-Cheng低周疲勞損傷模型和Park-Ang雙參數(shù)地震損傷模型進(jìn)行了基準(zhǔn)研究。 4、應(yīng)用混凝土壓應(yīng)變、鋼筋拉應(yīng)變和損傷指數(shù)定義了高速鐵路橋梁的性能水準(zhǔn),將橋梁的性能水準(zhǔn)分為完全運(yùn)營(yíng)、有限運(yùn)營(yíng)和接近倒塌三個(gè)等級(jí)。 5、結(jié)合擬靜力試驗(yàn)分析結(jié)果,對(duì)Caltrans規(guī)范和Priestley等人提出的橋墩強(qiáng)度計(jì)算公式進(jìn)行了討論分析。 6、對(duì)高速鐵路橋墩的延性抗震能力評(píng)估方法進(jìn)行了研究,并給出了具體的計(jì)算實(shí)例。
[Abstract]:Abstract: the construction of high-speed railway is in the ascendant. As an important part of railway network construction, bridge structure knows its seismic performance under earthquake. It is of great significance for the development of post-disaster rescue and maintenance and reinforcement work. In this paper, the seismic performance test of piers, finite element numerical simulation analysis, seismic damage performance analysis, the definition of performance level and the evaluation method of ductile aseismic capacity are carried out with the simple supported beam and bridge piers of high-speed railway as the research object. The main works are as follows: 1. The low cycle cyclic load loading test of circular end pier scale model of high speed railway is carried out, from failure mode, hysteresis curve, bearing capacity, ductility performance, The effects of shear span ratio, reinforcement ratio and hoop ratio on the seismic behavior of pier are studied in the aspects of stiffness degradation effect and residual displacement. 2. The finite element numerical simulation of pier model is carried out by OpenSees. The fiber element model under low cyclic loading is established, and the validity of the model is verified by experimental data. 3. The existing seismic damage models of reinforced concrete structures are compared systematically. The improved stiffness degradation model, Mander-Cheng low-cycle fatigue damage model and Park-Ang two-parameter seismic damage model are studied by reference. 4. The performance level of high-speed railway bridges is defined by using concrete compressive strain, reinforcement tension strain and damage index. The performance level of the bridge is divided into three grades: full operation, limited operation and near collapse. 5. Combined with the results of pseudostatic test, The calculation formula of pier strength proposed by Caltrans Code and Priestley et al is discussed and analyzed. 6. The evaluation method of ductility seismic capacity of bridge pier in high-speed railway is studied, and a concrete calculation example is given.
【學(xué)位授予單位】：北京交通大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：U442.55;U443.22

【參考文獻(xiàn)】

中國(guó)期刊全文數(shù)據(jù)庫(kù) 前10條

1 王召祜;;京滬高速鐵路橋梁設(shè)計(jì)[J];鐵道科學(xué)與工程學(xué)報(bào);2005年05期

2 王東升;郭迅;孫治國(guó);孟慶利;于德海;李曉莉;;汶川大地震公路橋梁震害初步調(diào)查[J];地震工程與工程振動(dòng);2009年03期

3 李剛,程耿東;基于投資-效益準(zhǔn)則的結(jié)構(gòu)目標(biāo)性能水平[J];大連理工大學(xué)學(xué)報(bào);2005年02期

4 趙冠遠(yuǎn),閻貴平;對(duì)美國(guó)橋梁抗震規(guī)范中橋墩抗剪強(qiáng)度計(jì)算公式的評(píng)價(jià)[J];世界地震工程;2002年04期

5 林均岐;陳永盛;王杰;;汶川8.0級(jí)地震綿竹市橋梁震害分析[J];世界地震工程;2010年01期

6 王召祜;客運(yùn)專線橋梁設(shè)計(jì)研究[J];鐵道標(biāo)準(zhǔn)設(shè)計(jì);2005年04期

7 文望青;客運(yùn)專線橋梁設(shè)計(jì)的思考[J];鐵道標(biāo)準(zhǔn)設(shè)計(jì);2005年11期

8 黃堅(jiān);盛黎明;;日本鐵路橋梁的抗震設(shè)計(jì)方法[J];鐵道標(biāo)準(zhǔn)設(shè)計(jì);2008年10期

9 王東升;李宏男;趙穎華;王國(guó)新;;鋼筋混凝土橋墩基于位移的抗震設(shè)計(jì)方法[J];土木工程學(xué)報(bào);2006年10期

10 劉健新;趙國(guó)輝;;“5·12”汶川地震典型橋梁震害分析[J];建筑科學(xué)與工程學(xué)報(bào);2009年02期

中國(guó)博士學(xué)位論文全文數(shù)據(jù)庫(kù) 前1條

1 夏修身;鐵路高墩抗震設(shè)計(jì)方法研究[D];蘭州交通大學(xué);2012年

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