中文核心期刊
CSCD来源期刊
中国科技核心期刊
RCCSE中国核心学术期刊
重庆交通大学学报（自然科学版）

重庆交通大学学报（自然科学版） ›› 2013, Vol. 32 ›› Issue (增1): 769-771.DOI: 10.3969/j.issn.1674-0696.2013.sup.1.10

• 桥梁结构安全评价 • 上一篇    下一篇

钢管混凝土拱面内稳定的时变可靠度分析

蒋伟，吕大刚   

  1. 哈尔滨工业大学土木工程学院，黑龙江哈尔滨150090
  • 收稿日期:2013-03-14 修回日期:2013-05-21 出版日期:2013-06-30 发布日期:2015-03-12
  • 作者简介:蒋伟(1982—)，男，山东济宁人，博士研究生，主要从事桥梁可靠度与设计理论研究。E-mail:jiangwei_hit@126.com.
  • 基金资助:
    国家自然科学基金重大研究计划项目( 90715021) ; 国家自然科学基金项目( 50678057)

Time-Dependent Ｒeliability Analysis on In-Plane Stability of Concrete-Filled Steel Tubular Arches

Jiang Wei，Lv Dagang   

  1. School of Civil Engineering，Harbin Institute of Technology，Harbin 150090，Heilongjiang，China
  • Received:2013-03-14 Revised:2013-05-21 Online:2013-06-30 Published:2015-03-12

PDF

摘要： 为研究不确定性对钢管混凝土拱面内徐变稳定承载力的影响，建立了其时变的极限状态函数，并将时间离散- 综合法和一次可靠度法相结合，得到了钢管混凝土拱面内稳定可靠指标随时间的变化曲线，以及相应的灵敏度指 标。计算结果表明:混凝土徐变引起的钢管混凝土拱面内稳定承载力的退化使得其可靠性显著降低;不同随机变量 的灵敏度差异明显，其中钢管外径的影响最大，然后依次是钢的弹性模量、混凝土的弹性模量、钢管壁厚以及混凝土 徐变系数;徐变对钢管混凝土拱面内稳定的影响较大，设计时应予以考虑。

关键词: 钢管混凝土拱, 时变可靠度, 时间离散-综合法, 一次可靠度法, 面内稳定, 混凝土徐变

Abstract: To investigate the influences of uncertainties on the in-plane creep stable bearing capacity of CFST arches，the time-dependent limit state function was established． The time discretized-integrated approach and the one-time reliability method were combined，therefore，the curve of the in-plane stability reliability indices changed with the time and corresponding sensitivity indices of CFST arches were obtained． The results show that: with the deterioration of in-plane stable bearing capacity caused by concrete creep，the reliability of CFST arches decreases significantly; the outer diameter of the steel tubular has the most important influences on reliability index and it is followed by the elastic modulus of steel，the elastic modulus of concrete，the thickness of steel tubular and the creep coefficient of concrete; the effects of concrete creep on in-plane stability of CFST arches are significant，which should be considered in design．

Key words: concrete-filled steel tubular arch ( CFST arch) , time-dependent reliability, time discretized-integrated approach; one-time reliability method, in-plane stability, concrete creep

中图分类号: