【摘要】：近年來,基于性能的橋梁結(jié)構(gòu)地震易損性分析已然成為當(dāng)下研究熱點之一,國內(nèi)外學(xué)者對此進行了廣泛且深入的研究,但因條件限制,理論易損性曲線尚未得到實測地震響應(yīng)結(jié)果的有效驗證。隨著振動臺試驗技術(shù)的快速發(fā)展,振動臺試驗也越來越先進化與精確化。論文基于OpenSEES有限元分析軟件,對某特大斜拉橋模型進行理論地震易損性分析,并通過振動臺模型試驗進行驗證。具體完成了如下工作：1、回顧了國內(nèi)外斜拉橋振動臺和易損性曲線的研究現(xiàn)狀,分析關(guān)于理論地震易損性曲線目前存在的問題,闡述建立大跨度斜拉橋易損性曲線和進行斜拉模型橋地震易損性的必要性；2、簡要介紹了建立理論地震易損性曲線的前期準(zhǔn)備過程：地震波的選取、損傷指標(biāo)的確定、彎矩—曲率分析以及增量動力分析方法的流程；3、詳細介紹了斜拉橋模型的工程概況以及有限元模型的建立,為斜拉模型橋地震易損性分析奠定了基礎(chǔ)；4、繪制了分別在縱橋向、橫橋向地震作用下斜拉模型橋的地震易損性曲線,并進行了對比分析,研究了斜拉模型橋的地震易損性特點；討論了粘滯阻尼器的減震作用及其對地震易損性的影響。最終用振動臺模型試驗的損傷結(jié)果,驗證了理論地震易損性曲線的正確性。
[Abstract]:In recent years, performance-based seismic vulnerability analysis of bridge structures has become one of the current research hot spots. Scholars at home and abroad have carried out extensive and in-depth research, but due to the constraints of the conditions. The theoretical vulnerability curve has not been effectively verified by the measured seismic response results. With the rapid development of shaking table test technology, shaking table test is becoming more and more advanced and accurate. Based on OpenSEES finite element analysis software, the theoretical seismic vulnerability of a large cable-stayed bridge model is analyzed and verified by shaking table model test. The main work is as follows: 1. The research status of vibration table and vulnerability curve of cable-stayed bridge at home and abroad is reviewed, and the existing problems of theoretical seismic vulnerability curve are analyzed. This paper expounds the necessity of establishing the vulnerability curve of long-span cable-stayed bridge and the earthquake vulnerability of cable-stayed model bridge, and briefly introduces the preparatory process for the establishment of theoretical seismic vulnerability curve: the selection of seismic wave and the determination of damage index. The flow chart of moment curvature analysis and incremental dynamic analysis is presented. The engineering survey of cable-stayed bridge model and the establishment of finite element model are introduced in detail, which lays a foundation for seismic vulnerability analysis of cable-stayed model bridge. 4. The seismic vulnerability curves of cable-stayed model bridges under longitudinal and transverse earthquake are drawn, and the characteristics of seismic vulnerability of cable-stayed model bridges are studied. The effects of viscous dampers on seismic vulnerability are discussed. Finally, the damage results of shaking table model test are used to verify the correctness of the theoretical seismic vulnerability curve.
【學(xué)位授予單位】：西南交通大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：U442.55;U448.27

【引證文獻】

相關(guān)碩士學(xué)位論文 前1條

1 馬騰;川藏鐵路簡支梁橋地震易損性及風(fēng)險評估研究[D];西南交通大學(xué);2016年

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本文編號：2174190