【摘要】：研究目的:截面形式對(duì)橋墩的力學(xué)性能有很大影響,中空截面的混凝土鐵路橋梁的高墩有明顯的優(yōu)越性,然而目前對(duì)圓形中空高墩的抗震性能研究有侍進(jìn)一步深入。本文以圓形空心高墩控制截面的材料發(fā)生損傷時(shí)所對(duì)應(yīng)的截面曲率為損傷指標(biāo),采用增量動(dòng)力分析方法,研究了圓形空心高墩的抗震性能。研究結(jié)論:分析結(jié)果表明:(1)圓形空心高墩在地震作用下,墩底、墩身中部、墩頂都是容易發(fā)生損傷的部位,但墩底比墩身中部和墩頂發(fā)生損傷的概率更大;(2)圓形空心高墩各個(gè)截面發(fā)生完全損傷的概率較小,說(shuō)明圓形空心高墩的抗震性能優(yōu)異;(3)圓形空心高墩地震易損性分析可為實(shí)際工程中高墩鐵路橋梁的抗震性能研究提供理論依據(jù)。
[Abstract]:Research purpose: section form has great influence on the mechanical properties of bridge pier, and the high pier of concrete railway bridge with hollow section has obvious advantages. However, the research on seismic behavior of circular hollow high pier has been further studied. In this paper, the seismic behavior of circular hollow high pier is studied by means of incremental dynamic analysis, taking the curvature of section corresponding to the damage of the material in the control section of circular hollow high pier as the damage index. The results show that: (1) under the action of earthquake, the bottom of the pier, the middle of the pier and the top of the pier are prone to damage, but the probability of damage to the bottom of the pier is greater than that of the middle of the pier and the top of the pier; (2) the probability of complete damage in each section of circular hollow high pier is small, which indicates that the seismic performance of circular hollow high pier is excellent; (3) the seismic vulnerability analysis of circular hollow high pier can provide theoretical basis for the study of seismic behavior of railway bridge with high pier in practical engineering.
【作者單位】： 北京交通大學(xué);
【基金】：國(guó)家自然科學(xué)基金面上項(xiàng)目(51178029)
【分類(lèi)號(hào)】：U443.22;U442.55

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本文編號(hào)：2320745