基于OpenSees回澜立交桥震害分析
发布时间：2018-11-17 15:24
【摘要】：小半径曲线梁桥被较多地应用于城市立交桥和高速公路立交桥等建设中,汶川地震中回澜立交桥为典型的小半径曲线梁桥,其严重破坏引起了许多学者的关注。本文以回澜立交桥震害为工程背景,在以往学者研究的基础上应用OpenSees分析平台,采用非线性时程分析方法,研究该桥的地震响应及震害情况。为准确模拟桥墩的弯剪破坏反应,完成了含弯剪破坏的12组钢筋混凝土桥墩拟静力试验与4组钢筋混凝土桥墩振动台试验的数值模拟,在此基础上确立了 OpenSees分析平台考虑桥墩剪切效应的建模思路。论文主要工作及进展如下:(1)阐述了曲线梁桥震害和抗震研究历史,介绍了 OpenSees分析平台弯剪破坏桥墩数值分析模型的研究现状。(2)基于OpenSees开放式平台,分别基于Elwood模型与Leborgne模型建立了考虑弯剪破坏的钢筋混凝土桥墩数值分析模型。通过12组弯剪破坏的钢筋混凝土桥墩拟静力试验数值分析,发现Elwood模型与试验结果偏差较大,可能与其参数估计公式离散性较大有关;若通过试验结果识别出相关参数,则Elwood模型能较准确模拟桥墩的滞回性能。Leborgne模型相对而言较准确的模拟了弯剪破坏桥墩的滞回曲线。(3)通过2组弯曲破坏桥墩和2组弯剪破坏桥墩振动台试验数值模拟,提出采用Leborgne模型通过数值拟静力试验准备及识别桥墩的滞回性能参数,再通过Elwood模型完成桥墩的非线性时程分析的方法,以实现弯剪破坏桥墩的时间过程分析。弯剪破坏桥墩振动台试验结果初步验证了上述方法的可行性。(4)基于OpenSees开放式平台,考虑桥墩弯剪破坏、支座滑移及脱空因素,建立了回澜立交桥D匝道桥非线性地震反应分析模型,通过输入含汶川地震在内的5组合适地震波,讨论了其地震反应及特征。研究发现在不同地震波下最矮2号桥墩(固接)几乎都发生屈服及进入塑性,当考虑桥墩剪切破坏时,最矮2号桥墩(固接)达到剪切破坏点后,随墩顶位移延性发展桥墩承载力有下降的趋势,弯剪破坏特征显现。分析中桥梁支座大都发生了滑移反应,与震害现象一致,竖向地震波对桥台与交界墩处支座影响较大,但仅El Centro地震波下交界墩处支座有脱空现象。
[Abstract]:Small radius curved girder bridges are widely used in the construction of urban flyovers and highway overpasses. Huilan overpass in Wenchuan earthquake is a typical small radius curved girder bridge, which has been seriously damaged by many scholars. Taking the earthquake disaster of Huilan overpass as the engineering background, using the OpenSees analysis platform and the nonlinear time-history analysis method, the earthquake response and earthquake damage of the bridge are studied in this paper. In order to accurately simulate the flexural shear failure response of the pier, 12 groups of pseudo-static tests of reinforced concrete pier with flexural shear failure and 4 groups of shaking table tests of reinforced concrete pier were completed. On this basis, the OpenSees analysis platform considering the shear effect of bridge pier is established. The main work and progress in this paper are as follows: (1) the history of seismic damage and seismic research of curved girder bridges is described, and the research status of numerical analysis model of bending and shear failure pier based on OpenSees analysis platform is introduced. (2) based on OpenSees open platform, Based on Elwood model and Leborgne model, the numerical analysis model of reinforced concrete pier considering flexural shear failure is established. Through the numerical analysis of 12 groups of reinforced concrete piers subjected to bending and shear failure, it is found that the deviation between Elwood model and test results is large, which may be related to the discreteness of parameter estimation formula. If the relevant parameters are identified from the test results, The Elwood model can accurately simulate the hysteretic performance of the pier. The Leborgne model can simulate the hysteretic curve of the flexural shear failure pier relatively accurately. (3) through two groups of flexural failure piers and two groups of flexural shear failure pier shaking table test numerical simulation. Leborgne model is used to prepare and identify the hysteretic performance parameters of pier by numerical pseudo-static test, and then the nonlinear time-history analysis method of pier is completed by Elwood model, so as to realize the time process analysis of pier subjected to bending and shear failure. The results of the shaking table test of the flexural shear failure bridge pier prove the feasibility of the above method. (4) based on the OpenSees open platform, the factors of pier bending shear failure, bearing slip and void removal are considered. A nonlinear seismic response analysis model for D-ramp bridge of Huilan overpass is established. The seismic response and its characteristics are discussed by inputting 5 groups of suitable seismic waves including Wenchuan earthquake. It is found that under different seismic waves, the shortest pier of No. 2 bridge (fixed joint) almost succumbs and enters plasticity. When considering the shear failure of pier, the shortest pier of No. 2 bridge (fixed joint) reaches the shear failure point. With the development of the ductility of the pier top, the bearing capacity of the pier decreases, and the characteristics of bending and shear failure appear. In the analysis, most of the bridge supports have slippage reaction, which is consistent with the earthquake damage phenomenon. The vertical seismic wave has a great influence on the support at the abutment and the junction pier, but only the support at the junction pier under the El Centro seismic wave has the phenomenon of void.
【学位授予单位】：大连海事大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：U442.55
[Abstract]:Small radius curved girder bridges are widely used in the construction of urban flyovers and highway overpasses. Huilan overpass in Wenchuan earthquake is a typical small radius curved girder bridge, which has been seriously damaged by many scholars. Taking the earthquake disaster of Huilan overpass as the engineering background, using the OpenSees analysis platform and the nonlinear time-history analysis method, the earthquake response and earthquake damage of the bridge are studied in this paper. In order to accurately simulate the flexural shear failure response of the pier, 12 groups of pseudo-static tests of reinforced concrete pier with flexural shear failure and 4 groups of shaking table tests of reinforced concrete pier were completed. On this basis, the OpenSees analysis platform considering the shear effect of bridge pier is established. The main work and progress in this paper are as follows: (1) the history of seismic damage and seismic research of curved girder bridges is described, and the research status of numerical analysis model of bending and shear failure pier based on OpenSees analysis platform is introduced. (2) based on OpenSees open platform, Based on Elwood model and Leborgne model, the numerical analysis model of reinforced concrete pier considering flexural shear failure is established. Through the numerical analysis of 12 groups of reinforced concrete piers subjected to bending and shear failure, it is found that the deviation between Elwood model and test results is large, which may be related to the discreteness of parameter estimation formula. If the relevant parameters are identified from the test results, The Elwood model can accurately simulate the hysteretic performance of the pier. The Leborgne model can simulate the hysteretic curve of the flexural shear failure pier relatively accurately. (3) through two groups of flexural failure piers and two groups of flexural shear failure pier shaking table test numerical simulation. Leborgne model is used to prepare and identify the hysteretic performance parameters of pier by numerical pseudo-static test, and then the nonlinear time-history analysis method of pier is completed by Elwood model, so as to realize the time process analysis of pier subjected to bending and shear failure. The results of the shaking table test of the flexural shear failure bridge pier prove the feasibility of the above method. (4) based on the OpenSees open platform, the factors of pier bending shear failure, bearing slip and void removal are considered. A nonlinear seismic response analysis model for D-ramp bridge of Huilan overpass is established. The seismic response and its characteristics are discussed by inputting 5 groups of suitable seismic waves including Wenchuan earthquake. It is found that under different seismic waves, the shortest pier of No. 2 bridge (fixed joint) almost succumbs and enters plasticity. When considering the shear failure of pier, the shortest pier of No. 2 bridge (fixed joint) reaches the shear failure point. With the development of the ductility of the pier top, the bearing capacity of the pier decreases, and the characteristics of bending and shear failure appear. In the analysis, most of the bridge supports have slippage reaction, which is consistent with the earthquake damage phenomenon. The vertical seismic wave has a great influence on the support at the abutment and the junction pier, but only the support at the junction pier under the El Centro seismic wave has the phenomenon of void.
【学位授予单位】：大连海事大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：U442.55
【参考文献】
相关期刊论文 前10条
1 陈彦江;郝朝伟;闫维明;李勇;;考虑行波效应的高墩刚构桥地震易损性分析[J];世界地震工程;2016年03期
2 李忠献;高营;李宁;;基于结构精细化模拟分析平台的弯剪纤维单元模型[J];建筑结构学报;2016年09期
3 韩建平;晁思思;;考虑轴-弯-剪耦合效应的钢筋混凝土柱滞回性能研究[J];世界地震工程;2016年02期
4 李正英;蒋林均;李正良;;曲线连续梁桥不同减隔震方案对比分析[J];振动与冲击;2016年10期
5 王煦;董军;焦驰宇;;纵向碰撞下FPS隔震曲线桥地震响应分析[J];工程抗震与加固改造;2015年06期
6 张菊辉;管仲国;;匝道桥地震响应影响要素分析[J];桥梁建设;2015年04期
7 张菊辉;管仲国;;立交匝道桥地震响应及合理抗震体系研究[J];振动与冲击;2015年13期
8 陈彦江;王俊华;闫维明;顾大鹏;程永欢;;小半径曲线梁桥抗倾覆性能研究[J];公路;2014年10期
9 孟杰;刘钊;张建东;;汶川地震回澜立交桥震害成因分析[J];振动与冲击;2014年12期
10 高康;袁万城;;拉索摩擦摆支座在曲线梁桥中的抗震分析[J];地震工程与工程振动;2014年03期
相关硕士学位论文 前3条
1 陈灿;弯剪相互作用下钢筋混凝土桥墩抗震非线性数值分析模型[D];大连理工大学;2014年
2 霍q，
本文编号：2338298
本文链接：https://www.wllwen.com/kejilunwen/daoluqiaoliang/2338298.html
