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)對于快速施工、降低施工對既有交通影響、降低對周邊生態(tài)環(huán)境沖擊的要求，預(yù)制節(jié)段拼裝技術(shù)為該問題提供了一條可供解決的途徑，因此該技術(shù)越來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，限制了該項技術(shù)在高烈度地區(qū)的應(yīng)用。隨著我國橋梁建設(shè)逐步向高地震危險地區(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)計者和抗震學(xué)者研究的重點和熱點。鑒于上述原因，本文結(jié)合國內(nèi)外相關(guān)研究現(xiàn)狀，通過擬靜力試驗對兩種不同類型預(yù)應(yīng)力節(jié)段拼裝混凝土橋墩進行了抗震性能試驗研究，并進行了數(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，以廣泛深入的文獻調(diào)研為基礎(chǔ)，，總結(jié)了國內(nèi)外學(xué)者對不同類型預(yù)應(yīng)力節(jié)段拼裝混凝土橋墩抗震性能的試驗研究方法和試驗結(jié)論，回顧了各國學(xué)者對預(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)計過程中的基本概念，以及不同設(shè)計方式對于預(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理，設(shè)計了兩組節(jié)段拼裝混凝土橋墩，進行了擬靜力試驗研究。對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)進行分析，說明了預(yù)應(yīng)力節(jié)段拼裝混凝土橋墩的破壞機理，同時比較了普通自密實混凝土和鋼纖維自密實混凝土對節(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預(yù)應(yīng)力節(jié)段拼裝混凝土橋墩進行了數(shù)值模擬分析，并對比試驗結(jié)果驗證其正確性，同時，對梁柱單元截面纖維劃分方式對計算結(jié)果的精度進行了分析。
[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)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：U443.22;U446

【參考文獻】

相關(guān)期刊論文 前7條

1 王志強;葛繼平;魏紅一;劉豐;;節(jié)段拼裝橋墩抗震性能研究進展[J];地震工程與工程振動;2009年04期

2 葛繼平;王志強;;干接縫節(jié)段拼裝橋墩集中塑性鉸模型的地震響應(yīng)分析[J];工程力學(xué);2010年08期

3 葛繼平;王志強;;干接縫節(jié)段拼裝橋墩振動臺試驗研究[J];工程力學(xué);2011年09期

4 陳興沖,田琪,孫杰;拼裝式雙柱橋墩梁—柱接頭的抗震驗算方法[J];蘭州鐵道學(xué)院學(xué)報;1999年01期

5 葛繼平;魏紅一;王志強;;循環(huán)荷載作用下預(yù)制拼裝橋墩抗震性能分析[J];同濟大學(xué)學(xué)報(自然科學(xué)版);2008年07期

6 王志強;葛繼平;魏紅一;;東海大橋預(yù)應(yīng)力混凝土橋墩抗震性能分析[J];同濟大學(xué)學(xué)報(自然科學(xué)版);2008年11期

7 布占宇;唐光武;;無黏結(jié)預(yù)應(yīng)力帶耗能鋼筋預(yù)制節(jié)段拼裝橋墩抗震性能研究[J];中國鐵道科學(xué);2011年03期

相關(guān)會議論文 前1條

1 劉鑫;董桃桃;高文軍;;自密實混凝土強度影響因素[A];第十六屆全國混凝土及預(yù)應(yīng)力混凝土學(xué)術(shù)會議暨第十二屆預(yù)應(yīng)力學(xué)術(shù)交流會論文集[C];2013年

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