全部 标题 作者
关键词 摘要

OALib Journal期刊
ISSN: 2333-9721
费用:99美元

查看量下载量

相关文章

更多...

基于混合算法的大跨度斜拉桥可靠度评估

, PP. 72-79

Keywords: 桥梁工程,斜拉桥,混合算法,神经网络,可靠指标,安全评估,参数敏感性

Full-Text   Cite this paper   Add to My Lib

Abstract:

为研究大跨度预应力混凝土(PC)斜拉桥的可靠度评估问题,提出了适用于大跨度PC斜拉桥这类复杂结构可靠性分析的混合算法。该方法综合运用了有限元分析(FEA)、径向基函数(RBF)神经网络、遗传算法(GA)和MonteCarlo重要抽样(MCIS)方法,并对算法中的关键步骤(RBF神经网络的初始样本点设计方法、MCIS的抽样中心点位置等)进行了改进,使结构分析模块与可靠度计算模块智能结合。利用数值算例的可靠度分析对该算法的有效性进行了验证。最后,以一座主跨为420m的双塔PC斜拉桥为工程背景,进行了正常使用极限状态下的可靠度分析。参数分析表明在汽车荷载作用下,该斜拉桥的主梁跨中位移超限失效概率比最长斜拉索强度失效概率高;汽车荷载的均值和标准差是影响斜拉桥可靠度的重要因素;随着汽车荷载均值系数的增大,主梁跨中位移超限失效的可靠指标下降的趋势较为显著。

References

[1]  CHENG J,LI Q S,XIAO R C. A New Artificial Neural Network-based Response Surface Method for Structural Reliability Analysis
[2]  [J ]. Probabilistic Engineering Mechanics,2008,23 (1): 51-63.
[3]  WANG Y,LI Z X,LI A Q. Combined Use of SHMS and Finite Element Strain Data for Assessing the Fatigue78 Reliability Index of Girder Components in Long-span Cable-stayed Bridge [J]. Theoretical and Applied Fracture Mechanics,2010,54 (2): 127-136.
[4]  CHENG J,XIAO R. Probabilistic Free Vibration and Flutter Analyses of Suspension Bridges [J]. Engineering Structures,2005,27 (10): 1509-1518.
[5]  武芳文,赵雷. 混凝土斜拉桥主梁静力可靠度分析[J]. 铁道学报,2006,28 (3): 87-91.WU Fang-wen,ZHAO Lei. Static Reliability Analysis ofthe Main Girder of Concrete Cable-stayed Bridge [J].Journal of the China Railway Society, 2006, 28(3): 87-91.
[6]  JTJ027—96,公路斜拉桥设计规范[S].JTJ027—96,Design Specifications of Highway Cablestayed Bridge [S]
[7]  张清华,卜-之,李乔. 斜拉桥结构可靠度分析的混沌混合算法[J]. 中国公路学报,2008,21 (3): 48-52.ZHANG Qing-hua,BU Yi-zhi,LI Qiao. Hybrid Chaos Algorithm of Structural Reliability Analysis of Cable-stayed Bridge [J]. China Journal of Highway and Transport,2008,21 (3): 48-52.
[8]  TANG,Q Y, ZHANG C X. Data Processing System(DPS) Software with Experimental Design, Statistical Analysis and Data Mining Developed for Use in Entomological Research [J]. Insect Science,2013,20(2): 254-260.
[9]  李向京,胡云昌. 基于遗传算法-神经网络混合训练技术的结构近似可靠分析方法[J]. 土木工程学报,2000,33 (5): 40-45.LI Xiang-jing,HU Yun-chang. Study on the Approximate Structural Reliability Analysis Method Based on GA-NN Combined Technology [J]. China Civil Engineering Journal,2000,33 (5): 40-45.
[10]  GONG Q,ZHANG J,TAN C,et al. Neural Networks Combined with Importance Sampling Techniques for Reliability Evaluation of Explosive Initiating Device [J].Chinese Journal of Aeronautics,2012,25 (2): 208-215.
[11]  桂劲松,康海贵. 结构可靠度分析的全局响应面法研究[J]. 建筑结构学报,2004,25 (4): 100-105.GUI Jin-song,KANG Hai-gui. The Study of the Whole Response Surface Method for Structural Reliability Analysis
[12]  [J ]. Journal of Building Structures, 2004, 25(4): 100-105.
[13]  沈惠申,王宇新. 斜拉桥主梁静动力可靠性分析[J]. 中国公路学报,1996,9 (1): 59-65.SHEN Hui-shen,WANG Yu-xin. Static and Dynamic Analysis of Girders of Cable-stayed Bridges [J]. China Journal of Highway and Transport,1996,9 (1): 59-65.
[14]  张建仁,刘扬. 遗传算法和人工神经网络在斜拉桥可靠度分析中的应用[J]. 土木工程学报,2001,34(1): 7-13.ZHANG Jian-ren, LIU Yang. Reliability Analysis of Cable-stayed Bridge Using GAS and ANN [J]. China Civil Engineering Journal,2001,34 (1): 7-13.
[15]  BIONDINI F, FRANGOPOL D M,MALERBA P G.Uncertainty Effects on Lifetime Structural Performance of Cable-stayed Bridges [J]. Probabilistic Engineering Mechanics,2008,23 (4): 509-522.
[16]  陈铁冰,王书庆,石志源. 计入结构几何非线性影响时斜拉桥可靠度分析[J]. 同济大学学报: 自然科学版,2000,28 (4): 407-412.CHEN Tie-bing, WANG Shu-qing, SHI Zhi-yuan.Reliability Analysis of Cable-stayed Bridges Consider in Geometrical Non-linearity
[17]  [J ]. Journal of Tongji University: Natural Science Edition,2000,28 (4):407-412.
[18]  程进,肖汝诚. 斜拉桥结构静力可靠度分析[J]. 同济大学学报: 自然科学版,2004,32 (12): 1593-1598.CHENG Jin,XIAO Ru-cheng. Static Reliability Analysis of Cable-stayed Bridges [J]. Journal of Tongji University:Natural Science Edition,2004,32 (12): 1593-1598.
[19]  CHENG J,LI Q S. Reliability Analysis of a Long Span Steel Arch Bridge Against Wind-induced Stability Failure During Construction [J]. Journal of Constructional Steel Research,2009,65 (3): 552-558.
[20]  HOHENBICHLER M, RACKWITZ R. Sensitivity and Importance Measures in Structural Reliability [J]. Civil Engineering Systems,1986,3 (4): 203-209.
[21]  KONG X,WU D J,CAI C S,et al. New Strategy of Substructure Method to Model Long-span Hybrid CablestayedBridges under Vehicle-induced Vibration [J].Engineering Structures,2012,34: 421-435.

Full-Text

Contact Us

service@oalib.com

QQ:3279437679

WhatsApp +8615387084133