本文關(guān)鍵詞：干接縫節(jié)段拼裝橋墩抗震性能地震臺(tái)試驗(yàn)研究　出處：《重慶交通大學(xué)》2014年碩士論文　論文類(lèi)型：學(xué)位論文

  更多相關(guān)文章： 節(jié)段拼裝橋墩 振動(dòng)臺(tái)試驗(yàn) 纖維模型分析方法

【摘要】：隨著強(qiáng)調(diào)施工工期短、對(duì)現(xiàn)有交通影響盡量小、不影響當(dāng)?shù)氐纳鷳B(tài)環(huán)境等方面要求的提高,預(yù)制節(jié)段拼裝技術(shù)倍受青睞。然而節(jié)段拼裝施工技術(shù)一直用于橋梁上部結(jié)構(gòu)中,近十幾年才逐步用于下部結(jié)構(gòu)。因此對(duì)于節(jié)段拼裝橋墩,其抗震性能如何,目前仍然缺乏系統(tǒng)的研究。鑒于上述原因,本文結(jié)合國(guó)內(nèi)外相關(guān)研究的現(xiàn)狀,通過(guò)振動(dòng)臺(tái)試驗(yàn),對(duì)節(jié)段拼裝橋墩進(jìn)行了抗震性能研究,試圖揭示節(jié)段拼裝橋墩的地震破壞機(jī)理；并對(duì)節(jié)段拼裝橋墩進(jìn)行了非線性有限元分析研究,試圖找到節(jié)段拼裝橋墩的有效模擬方法。綜合起來(lái),本文主要進(jìn)行了以下幾部分的工作： ①在查閱大量國(guó)內(nèi)外文獻(xiàn)的基礎(chǔ)上,對(duì)采用節(jié)段拼裝橋墩的橋梁的應(yīng)用現(xiàn)狀和應(yīng)用前景、節(jié)段拼裝橋墩的種類(lèi)及其力學(xué)特征、節(jié)段拼裝橋墩的理論研究和試驗(yàn)研究等現(xiàn)狀進(jìn)行了回顧與總結(jié)。 ②為探討節(jié)段拼裝橋墩的抗震性能,設(shè)計(jì)了一套試驗(yàn)方案,該方案采用振動(dòng)臺(tái)試驗(yàn)方法進(jìn)行試驗(yàn)研究,模型橋墩使用自密實(shí)混凝土澆筑而成。 ③采用振動(dòng)臺(tái)試驗(yàn)方法分析了本文中混凝土橋墩的動(dòng)力特性,損傷破壞過(guò)程,接縫的擴(kuò)展規(guī)律,相同加速度激勵(lì)下的最大位移響應(yīng)等。 ④以O(shè)penSees為基礎(chǔ),針對(duì)節(jié)段拼裝橋墩的構(gòu)造特點(diǎn),采用纖維模型分析方法對(duì)地震臺(tái)試件分別進(jìn)行了非線性時(shí)程分析。在此分析方法中,對(duì)節(jié)段拼裝橋墩涉及到的接縫,無(wú)粘結(jié)預(yù)應(yīng)力鋼筋等特殊問(wèn)題,在結(jié)合試驗(yàn)的基礎(chǔ)上給出了適宜的模擬方法,然后對(duì)振動(dòng)臺(tái)試件進(jìn)行了非線性有限元分析,比較了纖維模型分析結(jié)果與試驗(yàn)結(jié)果的異同。與試驗(yàn)結(jié)果的比較表明：纖維模型分析方法是分析節(jié)段拼裝橋墩抗震性能的有效近似分析方法。
[Abstract]:With the emphasis on the short construction period, the impact on the existing traffic as little as possible, without affecting the local ecological environment and other aspects of the requirements. Precast segmental assembly technology is very popular. However, segmental assembly construction technology has been used in the superstructure of bridge, and gradually used in the substructure in the past ten years. In view of the above reasons, combined with the domestic and foreign related research status, through shaking table test, the seismic performance of segmental assembled piers is studied. This paper attempts to reveal the seismic failure mechanism of segmental assembled piers. The nonlinear finite element analysis of segmental assembled piers is carried out in order to find an effective simulation method for segmental assembly of piers. 1 on the basis of consulting a large number of domestic and foreign literatures, the application status and prospect of the bridge with segmental piers, the types and mechanical characteristics of segmented piers are discussed. The present situation of theoretical and experimental research on segmental assembled piers is reviewed and summarized. 2 in order to study the seismic behavior of segmental assembled piers, a set of test scheme is designed. The method of shaking table test is used to test and study, and the model pier is made of self-compacting concrete. (3) the dynamic characteristics, damage and failure process of concrete pier, the law of joint expansion and the maximum displacement response under the same acceleration are analyzed by means of shaking table test method in this paper. 4 based on OpenSees, according to the structural characteristics of segmental assembled piers, the nonlinear time-history analysis of seismic station specimens is carried out by using fiber model analysis method. According to the special problems such as joint, unbonded prestressed steel bar and so on, the suitable simulation method is given on the basis of the test, and then the nonlinear finite element analysis of the shaking table specimen is carried out. The comparison between the fiber model analysis results and the experimental results shows that the fiber model analysis method is an effective approximate analysis method for the seismic performance of segmental assembled piers.
【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(lèi)號(hào)】：U442.55

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