[1]崔凤坤,杜岳涛,徐 岳,等.基于混合算法的大跨度钢管混凝土拱桥正常使用可靠度评估[J].西安建筑科技大学学报(自然科学版),2016,48(06):874-880.[doi:10.15986/j.1006-7930.2016.06.016]
　CUI Fengkun,DU Yuetao,XU Yue,et al.Reliability evaluation for long-span CFST arch bridges at serviceability limit states based on hybrid algorithm[J].J. Xi’an Univ. of Arch. & Tech.(Natural Science Edition),2016,48(06):874-880.[doi:10.15986/j.1006-7930.2016.06.016]
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基于混合算法的大跨度钢管混凝土拱桥正常使用可靠度评估()
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西安建筑科技大学学报（自然科学版）[ISSN:1006-7930/CN:61-1295/TU]

卷:
48
期数:
2016年06期
页码:
874-880
栏目:
出版日期:
2016-12-31

文章信息/Info

Title:
Reliability evaluation for long-span CFST arch bridges at serviceability limit states based on hybrid algorithm
文章编号:
1006-7930(2016)06-0874-07
作者:
崔凤坤1 ; 杜岳涛1; 徐 岳1; 邵国涛2; 张昊男1
1．长安大学公路学院 陕西 西安710064；2．台州学院建筑工程学院 浙江 台州 318000
Author(s):
CUI Fengkun 1;  DU Yuetao1;  XU Yue1;  SHAO Guotao2;  ZHANG Haonan1
1.School of Highway, Changʹan University, Xiʹan 710064,China; 2. College of Civil Engineering, Taizhou College, Taizhou 318000,China
关键词:
钢管混凝土拱桥; BP神经网络; 正常使用极限状态; 可靠度评估
Keywords:
CFST arch bridge;  BP neural network;  serviceability limit state;  reliability evaluation
分类号:
U442.5
DOI:
10.15986/j.1006-7930.2016.06.016
文献标志码:
A
摘要:
基于《公路钢管混凝土拱桥设计规范》和《钢管混凝土拱桥技术规范》系统的构建了大跨度钢管混凝土拱桥正常使用可靠度评估模型．针对钢管混凝土拱桥功能函数隐式化及高度非线性的问题，将BP神经网络、均匀设计法及改进JC法综合运用，提出了适用于这类复杂结构可靠度分析的混合算法，通过数值算例和实际结构验证了该算法的可行性和准确性．实桥工程评估表明：在正常使用极限状态下，大跨度钢管混凝土拱桥各构件可靠度水平差异较大，主拱应力和挠度可靠指标均远超规范的规定，具有较大的优化空间；横梁和立柱应力可靠指标偏低，应引起设计的注意．


 

Abstract:
Based on the codes entitled separately “Specifications for Design of Highway CFST Arch Bridges” and “Technical Code for CFST Arch Bridges”, the reliability evaluation model is presented for long-span CFST arch bridges at serviceability limit state. Aiming at the implicit and nonlinear characteristics of CFST arch bridges, a hybrid algorithm for calculating the reliability index is proposed with combination the BP neural network, UD design method and JC method comprehensively. The feasibility and accuracy of the hybrid algorithm are proved through the numerical and structural examples. The analysis result of practical engineering indicates that, there is a large difference in the reliability levels of different components for long-span CFST arch bridges during the serviceability limit state. The arch rib can be further optimized due to its reliability indexes of deflection and stress highly exceeding the requirements of codes. While the reliability indexes of stress for cross beam and column of are at lower level, which should be concentrated by designers.

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备注/Memo

备注/Memo:
收稿日期：2016-03-03               修改稿日期：2016-11-12

基金项目：国家自然科学基金资助项目(50808019)；国家留学基金委资助项目(201606560011)

作者简介：崔凤坤(1990—)，男，博士生，主要从事大跨径桥梁可靠度分析及风险评估方面的研究．E-mail: 929599342@qq.com

更新日期/Last Update: 2017-02-04