基于混合模拟法的连续刚构桥静力可靠度分析
详细信息 本馆镜像全文    |  推荐本文 | | 获取馆网全文
摘要
为对大跨连续刚构桥在多维随机因素作用下的安全性进行有效评估,将Monte-Carlo法与响应面法相结合,建立基于混合模拟法的结构可靠度分析方法。该方法首先利用MonteCarlo法对结构进行若干次循环分析,以此计算出各随机变量的可靠性灵敏度因子,再将灵敏度较高的输入变量继续作为随机变量,利用响应面法拟合出结构的功能函数,最后利用Monte-Carlo法求解出显式化功能函数的可靠指标。采用混合模拟法与概率网络估算法相结合计算承载能力极限状态下连续刚构桥的可靠度,以广西百色市江坝右江特大桥为例进行分析,结果表明,承载能力极限状态下,中跨跨中截面抗弯失效模式是该桥上部结构静力体系可靠度的控制失效模式。
To effectively evaluate the safety of long span continuous rigid-frame bridge under the action of multivariate random variables,the Monte-Carlo method was combined with the response surface method and a structural reliability analysis method based on the hybrid simulation method was established.In the analysis method,the Monte-Carlo method was firstly used to carry out several times of repeated analysis of the structure and according to the analysis,the reliability sensitivity factors of all random variables were calculated.Then the input variables with higher sensitivity factors were continuously treated as the random variables and the response surface method was used to fit the performance functions of the structure.Finally,the Monte-Carlo method was again used to calculate the reliability indices of the explicit performance functions.By way of example of Jiangba Youjiang River Bridge in Baise City,Guangxi,the reliability of the continuous rigid-frame bridge in the ultimate bearing capacity state was calculated,using the hybrid simulation method combined with the probability network estimation method.The results of the calculation demonstrate that in the ultimate bearing capacity state,the bending failure mode of the midspan section of the central span is the controlled failure mode of the static system reliability of the superstructure of the bridge.
引文
[1]Li Xian-min,Wang Meng-shu,Liang Yan-hui.Research into Design and Construction Key Technologies of Prestressed Concrete Continuous Rigid Frame Bridge[J].Journal of Bridge Engineering,2011,16(2):248-258.
    [2]马显红,余毅.高墩大跨连续刚构桥施工控制参数敏感性分析[J].桥梁建设,2012,42(3):57-62.(MA Xian-hong,YU Yi.Analysis of Parameter Sensitivity of Construction Control of High-Rise Pier and Long Span Continuous Rigid-Frame Bridge[J].Bridge Construction,2012,42(3):57-62.in Chinese)
    [3]李华,王道斌,曾庆元.大跨度连续刚构桥预应力混凝土箱形梁极限承载力力分析[J].中国公路学报,2000,13(1):38-43.(LI Hua,WANG Dao-bin,ZENG Qing-yuan.Analysis of the Ultimate Beaing Capacity for Prestressed Concrete Box Beam of Long-Span Continuous RigidFrame Bridge[J].China Journal of Highway and Transport,2000,13(1):38-43.in Chinese)
    [4]林新元,高晓华,张峰.基于组合模型的连续刚构施工期开裂分析[J].桥梁建设,2010,(4):43-46.(LIN Xin-yuan,GAO Xiao-hua,ZHANG Feng.Analysis of Cracking in Continuous Rigid-Frame Structure in Construction Period Based on Combined Element Model[J].Bridge Construction,2010,(4):43-46.in Chinese)
    [5]刘扬,丁欣海,鲁乃唯.基于自适应MC法大跨连续刚构桥施工控制可靠度研究[J].交通科学与工程,2012,28(4):25-31.(LIU Yang,DING Xin-hai,LU Nai-wei.Research on Reliability of Construction Control of Long-Span Continuous Rigid Frame Bridge Based on Adaptive MC Method[J].Journal of Transport Science and Engineering,2012,28(4):25-31.in Chinese)
    [6]刘扬,鲁乃唯.基于响应面法的连续刚构桥梁体系可靠度分析[J].交通科学与工程,2010,26(4):24(LIU Yang,LU Nai-wei.Analysis on System Reliability of Rigid-Frame Bridge Based on Response Surface Method[J].Journal of Transport Science and Engineering.2010,26(4):24-29.in Chinese)
    [7]孙传智,李爱群,缪长青,等.大跨混凝土刚构桥参数识别和标高控制动态可靠度评估[J].东南大学学报(自然科学版),2012,42(1):104-108.(SUN Chuan-zhi,LI Ai-qun,MIAO Chang-qing,et al.Parameter Identification and Dynamic Reliability Evaluation of Evaluation Control for Long-Span Concrete Rigid-Frame Bridge[J].Journal of Southeast University(Natural Science Edition),2012,42(1):104-108.in Chinese)
    [8]陈文元,赵雷,钟强文,等.基于响应面法的连续刚构地震可靠度分析[J].地震工程与工程振动,2009,29(3):45-50.(CHEN Wen-yuan,ZHAO Lei,ZHPNG Qiang-wen,et al.Seismic Reliability Analysis of Rigid Frame Bridge Based on Response Surface Method[J].Journal of Earthquake Engineering and Engineering Vibration,2009,29(3):45-50.in Chinese)
    [9]张伟.结构可靠性理论与应用[M].北京:科学出版社,2009.(ZHANG Wei.Theory and Application of Structural Reliability[M].Beijing:Science Press,2009.in Chinese)
    [10]Zhao Yan-Gang,Tetsuro Ono.Moment Methods for Structural Reliability[J].Structural Safety,2001,23(1):47-75.
    [11]李洪双,吕震宙,赵洁.基于加权线性响应面法的支持向量机可靠性分析方法[J].工程力学,2007,24(5):67-71,46.(LI Hong-shuang,LU Zhen-zhou,ZHAO Jie.A Support Vector Method for Reliability Analysis Based on Weighted Linear Response Surface Method[J].Engineering Mechanics,2007,24(5):67-71,46.in Chinese)
    [12]张建仁,刘扬,许福,等.结构可靠性理论及其在桥梁工程中的应用[M].北京:人民交通出版社,2002.(ZHANG Jian-ren,LIU Yang,XU Fu,et al.Structural Reliability Theory and Its Application to Bridge Engineering[M].Beijing:China Communications Press,2002.in Chinese)
    [13]李扬海,鲍卫刚,郭修武,等.公路桥梁结构可靠度与概率极限状态设计[M].北京:人民交通出版社,1997.(LI Yang-hai,BAO Wei-gang,GUO Xiu-wu,et al.Reliability and Probability Limit State Design of Highway Bridge Structures[M].Beijing:China Communications Press,1997.in Chinese)

版权所有:© 2023 中国地质图书馆 中国地质调查局地学文献中心