中承式钢管混凝土拱桥弹塑性地震时程分析

doi:10.13229/j.cnki.jdxbgxb201406016

吉林大学学报(工学版) ›› 2014, Vol. 44 ›› Issue (6): 1633-1638.doi: 10.13229/j.cnki.jdxbgxb201406016

中承式钢管混凝土拱桥弹塑性地震时程分析

云迪¹, 刘贺², 张素梅³

1.吉林建筑大学土木工程学院,长春 130118;
2.吉林农业工程职业技术学院,吉林四平 136000;
3.哈尔滨工业大学土木工程学院,哈尔滨 150090

收稿日期:2014-03-23 出版日期:2014-11-01 发布日期:2014-11-01
作者简介:云迪(1975-),女,副教授.研究方向:组合结构.E-mail:
基金资助:
国家自然科学基金项目(51308254)

Elastic-plastic time-history analysis of half-through CFST arch bridge

YUN Di¹, LIU He², ZHANG Su-mei³

1.School of Civil Engineering, Jilin Jianzhu University, Changchun 130118, China;
2.Jilin Vocational Technical College of Agricultural Engineering, Siping 136000, China;
3.School of Civil Engineering, Harbin Institute of Technology, Harbin 150090, China

Received:2014-03-23 Online:2014-11-01 Published:2014-11-01

摘要/Abstract

摘要： 借助ANSYS软件,采用动态增量法IDA(Incremental dynamic analysis)方法,以El-centro波为基本地震波,对一大跨中承式钢管混凝土拱桥进行了不同峰值加速度地震作用下的三维弹塑性时程分析。引入包括拱肋节点位移、位移延性系数及应变能在内的多个响应指标,并依据B-R准则最终确定了本文算例在地震作用下的动力稳定极限承载力,研究了大跨钢管混凝土拱桥的抗震性能及其在强震作用下的破坏机理,对大跨钢管混凝土拱桥的抗震设计给出指导。研究表明,大跨钢管混凝土拱桥在强震作用下的动力破坏是结构位移和塑性发展共同作用的结果,结构位移最大处发生于拱顶附近,塑性发展程度最深的杆件位于拱脚附近,峰值加速度对于结构构件进入弹塑性工作阶段后的变形能力无显著影响;并得出评价分析大跨钢管混凝土拱桥抗震性能及其在大震作用下的破坏机理时采用刚度、延性等多项指标更为必要和全面的结论。

关键词: 土木建筑结构, 钢管混凝土, 拱桥, 弹塑性时程分析, 动力稳定性

Abstract: Elastic-plastic time-history analysis on a large span half-through Concrete-Filled Steel Tubular (CFST) arch bridge was conducted using ANSYS. Taking the acceleration record of El-Centro earthquake as the originally inputted wave, a series wave of different peak accelerations was produced. Then, the relationship between peak acceleration and following responses, such as the maximal displacement, strain energy of elements and ductility factor, were obtained. Finally, the dynamic stability ultimate bearing capacity and the aseismic behavior of the CFST arch bridge were determined. The analysis results have some theoretical significance to aseismic design of CFST bridges. The analysis shows that dynamic bucking of the structure is resulted from the development of both displacement and plasticity of the arch rib. The maximum displacement indubitably occurs near the arch crown and plasticity development always begins from the spring. It is concluded that the application with various responses is more necessary and reasonable in the research of aseismic behavior and dynamic stability of large span CFST arch bridges.

Key words: civil architectural structure, CFST, arch bridge, elastic-plastic time-history analysis, dynamic stability

中图分类号:

TU378

云迪, 刘贺, 张素梅. 中承式钢管混凝土拱桥弹塑性地震时程分析[J]. 吉林大学学报(工学版), 2014, 44(6): 1633-1638.

YUN Di, LIU He, ZHANG Su-mei. Elastic-plastic time-history analysis of half-through CFST arch bridge[J]. 吉林大学学报(工学版), 2014, 44(6): 1633-1638.

参考文献

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中承式钢管混凝土拱桥弹塑性地震时程分析

Elastic-plastic time-history analysis of half-through CFST arch bridge

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