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[1]陈旭勇,樊建平.概率模型参数区间变化的在役桥梁可靠性评估[J].武汉工程大学学报,2010,(09):35-37.[doi:10.3969/j.issn.16742869.2010.09.010]
　CNEN Xu yong,FAN Jian ping.Reliability assessment of existing bridges in interval parameters of stochastic model[J].Journal of Wuhan Institute of Technology,2010,(09):35-37.[doi:10.3969/j.issn.16742869.2010.09.010]
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概率模型参数区间变化的在役桥梁可靠性评估(/HTML)
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《武汉工程大学学报》[ISSN:1674-2869/CN:42-1779/TQ]

卷:
期数:
2010年09期
页码:
35-37
栏目:
资源与土木工程
出版日期:
2010-09-30

文章信息/Info

Title:
Reliability assessment of existing bridges
in interval parameters of stochastic model
文章编号:
16742869(2010)09003503
作者:
陈旭勇1; 樊建平2
1.武汉工程大学环境与城市建设学院,湖北 武汉 430074;
2.华中科技大学土木工程与力学学院,湖北 武汉 430074
Author(s):
CNEN Xuyong1; FAN Jianping2
1.School of Environment and Civil Engineering,Wuhan Institute of Technology,Wuhan 430074,China;
2.School of Civil Engineering & Mechanics,Huazhong University of Science and Technology,Wuhan 430074,China
关键词:
在役桥梁; 可靠性评估; 随机变量; 区间变量
Keywords:
the existing bridge;  reliability evaluation;  random variable;  interval variable
分类号:
U445
DOI:
10.3969/j.issn.16742869.2010.09.010
文献标志码:
A
摘要:
建立了随机变量参数区间变化的在役桥梁可靠性评估模型,从而验证参数的小变化对在役桥梁可靠性评估的影响.通过实践工程表明,随机变量参数的小偏差,对评估结果影响较大,若以工程界接受的5%的偏差为例,计算发现,最大失效概率是最小失效概率的6 248.8倍.因此,在役桥梁中,概率分布不明确时,不能按设计参数进行可靠性评估,而应根据实测资料进行概率分布统计.由于受经费及测量手段的限制,很难得到精确的概率分布函数,建议采用区间变量的非概率可靠性进行在役桥梁的评估.
Abstract:
The paper establishes existing bridge reliability evaluation model of random variable parameters with interval changes to verify influences of small changes of parameters on reliability evaluation of existing bridge. Practical projects show that small deviation of random variable parameters is of great influence on evaluation results. To take the 5% deviation accepted by the engineering field as an example, calculation results show that the max failure probability is 6 248.8 times of the min failure probability. Therefore, for existing bridge, if the probability distribution is not clear, reliability evaluation shall not be made based on designed parameters but refer to measured data. Due to limitation of funds and measuring methods, it is difficult to obtain exact probability distribution functions. Therefore, we suggest using nonprobability reliability of interval variables to evaluate existing bridge.

参考文献/References:

［1］Freudenthal A M.The safety of structures［J］.Trans,ASCE,1947,112:39.
［2］Cornell CA.A probabilitybased code［J］.ACI Structural Journal,1969,66(12):2032.
［3］Rackwitz R,Fiessler B.Structural reliability under combined Random load sequences［J］.J Computers & Structures,1978(9):5869.
［4］Ellishakoff I.Essay on uncertainties in elastic and viscoelastic structures:from A M Freudenthals criticisms to modern convex modeling［J］.J Computers & Structures,1995,56(6):871895.
［5］BenHaim Y.A nonprobabilistic concept of reliability［J］.Structural safety,1994,14(4):227245.
［6］郭书祥,冯立富.随机模型参数不确定时结构失效概率的区间估计［J］.空军工程大学学报:自然科学版,2003,4(2):8486.
［7］中华人民共和国交通部.GB/T 502831999公路工程结构可靠度设计统一标准［S］.北京:中国计划出版社,1999.

相似文献/References:

[1]郭慧鹏,陈旭勇*,许峙峰,等.一种桥梁实测小样本数据的区间优化方法——灰自助抽样与灰色系统理论相结合[J].武汉工程大学学报,2021,43(06):649.[doi:10.19843/j.cnki.CN42-1779/TQ.202106008]
　GUO Huipeng,CHEN Xuyong*,XU Zhifeng,et al.Interval Optimization Method for Small Sample Data of Bridge —— Measurements：Combination of Grey Bootstrap and Grey System Theory[J].Journal of Wuhan Institute of Technology,2021,43(09):649.[doi:10.19843/j.cnki.CN42-1779/TQ.202106008]

备注/Memo

备注/Memo:
龚晓宁收稿日期:20090513基金项目:国家自然科学基金资助项目(10972084)作者简介:陈旭勇(1979),男,湖北武汉人,博士.研究方向:桥梁的评估与改造加固、大跨度桥梁的计算分析.通讯作者:樊建平(1957),男,教授,博士生导师.研究方向:桥梁的评估与改造加固、大跨度桥梁的计算分析.
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