本文關(guān)鍵詞：預(yù)應(yīng)力節(jié)段拼裝混凝土橋墩擬靜力試驗(yàn)研究及數(shù)值分析　出處：《重慶交通大學(xué)》2014年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 節(jié)段拼裝技術(shù) 破壞機(jī)理 抗震特性 纖維梁柱單元 數(shù)值分析

【摘要】：隨著現(xiàn)代化施工技術(shù)對(duì)于快速施工、降低施工對(duì)既有交通影響、降低對(duì)周邊生態(tài)環(huán)境沖擊的要求，預(yù)制節(jié)段拼裝技術(shù)為該問(wèn)題提供了一條可供解決的途徑，因此該技術(shù)越來(lái)越受到橋梁工程師和業(yè)主的青睞，并在世界范圍內(nèi)得到了廣泛認(rèn)可和應(yīng)用。但是，對(duì)預(yù)應(yīng)力節(jié)段拼裝混凝土橋墩抗震性能的不確定性，限制了該項(xiàng)技術(shù)在高烈度地區(qū)的應(yīng)用。隨著我國(guó)橋梁建設(shè)逐步向高地震危險(xiǎn)地區(qū)的發(fā)展，預(yù)應(yīng)力節(jié)段拼裝混凝土橋墩的抗震性能研究已經(jīng)成為橋梁設(shè)計(jì)者和抗震學(xué)者研究的重點(diǎn)和熱點(diǎn)。鑒于上述原因，本文結(jié)合國(guó)內(nèi)外相關(guān)研究現(xiàn)狀，通過(guò)擬靜力試驗(yàn)對(duì)兩種不同類型預(yù)應(yīng)力節(jié)段拼裝混凝土橋墩進(jìn)行了抗震性能試驗(yàn)研究，并進(jìn)行了數(shù)值模擬分析，旨在探究節(jié)段拼裝預(yù)應(yīng)力混凝土橋墩的地震破壞機(jī)理和有效的數(shù)值模擬方法。本文的主要工作如下述所示： 首先，以廣泛深入的文獻(xiàn)調(diào)研為基礎(chǔ)，，總結(jié)了國(guó)內(nèi)外學(xué)者對(duì)不同類型預(yù)應(yīng)力節(jié)段拼裝混凝土橋墩抗震性能的試驗(yàn)研究方法和試驗(yàn)結(jié)論，回顧了各國(guó)學(xué)者對(duì)預(yù)應(yīng)力節(jié)段拼裝混凝土橋墩抗震性能的理論研究現(xiàn)狀，闡述了在預(yù)應(yīng)力節(jié)段拼裝混凝土橋墩設(shè)計(jì)過(guò)程中的基本概念，以及不同設(shè)計(jì)方式對(duì)于預(yù)應(yīng)力節(jié)段拼裝混凝土橋墩抗震性能的影響。 其次，為初步探究預(yù)應(yīng)力節(jié)段拼裝混凝土橋墩的抗震性能和破壞機(jī)理，設(shè)計(jì)了兩組節(jié)段拼裝混凝土橋墩，進(jìn)行了擬靜力試驗(yàn)研究。對(duì)橋墩在地震荷載作用下的滯回特性、剛度退化規(guī)律、延性性能、耗能能力及殘余變形等參數(shù)進(jìn)行分析，說(shuō)明了預(yù)應(yīng)力節(jié)段拼裝混凝土橋墩的破壞機(jī)理，同時(shí)比較了普通自密實(shí)混凝土和鋼纖維自密實(shí)混凝土對(duì)節(jié)段拼裝橋墩抗震性能的影響。 最后，采用OpenSees有限元分析軟件中的纖維梁柱單元對(duì)預(yù)應(yīng)力節(jié)段拼裝混凝土橋墩進(jìn)行了數(shù)值模擬分析，并對(duì)比試驗(yàn)結(jié)果驗(yàn)證其正確性，同時(shí)，對(duì)梁柱單元截面纖維劃分方式對(duì)計(jì)算結(jié)果的精度進(jìn)行了分析。
[Abstract]:With the modern construction technology for rapid construction, reduce the construction of existing traffic impact, reduce the impact on the surrounding ecological environment requirements, prefabricated segment assembly technology provides a way to solve this problem. Therefore, the technology has been more and more favored by bridge engineers and owners, and has been widely recognized and applied in the world. However, the seismic behavior of prestressed segmented concrete pier is uncertain. The application of this technology in high intensity areas is limited. With the development of bridge construction in China, it is gradually developed to high seismic risk areas. The study of seismic behavior of prestressed segmental assembled concrete pier has become the focus and focus of bridge designers and aseismic scholars. In view of the above reasons, this paper combines the domestic and foreign related research status. The aseismic behavior of two different types of prestressed segmental assembled concrete piers is studied by pseudo-static test and numerical simulation analysis is carried out. The purpose of this paper is to explore the seismic failure mechanism and effective numerical simulation method of segmented prestressed concrete piers. The main work of this paper is as follows: Firstly, based on extensive and in-depth literature research, the experimental research methods and experimental conclusions on seismic behavior of different types of prestressed segment assembled concrete pier are summarized by domestic and foreign scholars. This paper reviews the current situation of theoretical research on the seismic behavior of prestressed segmental assembled concrete piers, and expounds the basic concepts in the design process of prestressed segmental assembly concrete piers. And the influence of different design methods on seismic behavior of prestressed segmental assembled concrete pier. Secondly, in order to explore the seismic behavior and failure mechanism of prestressed segmental assembled concrete pier, two groups of segmental assembled concrete pier are designed. The hysteretic characteristics, stiffness degradation law, ductility performance, energy dissipation capacity and residual deformation of pier under earthquake load are analyzed. The failure mechanism of prestressed segmental assembled concrete pier is explained, and the influence of ordinary self-compacting concrete and steel fiber self-compacting concrete on seismic performance of segmental assembled concrete pier is compared. Finally, the fiber Liang Zhu element in the OpenSees finite element analysis software is used to simulate and analyze the prestressed segment assembled concrete pier, and the results are compared with the experimental results to verify its correctness. The accuracy of the calculation results was analyzed by the fiber division method of Liang Zhu unit section.
【學(xué)位授予單位】：重慶交通大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：U443.22;U446

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