桥梁系统地震易损性分析的混合Copula函数方法

宋帅; 钱永久; 吴刚

doi:10.6052/j.issn.1000-4750.2015.12.1030

桥梁系统地震易损性分析的混合Copula函数方法

1.
西南交通大学土木工程学院, 四川, 成都 610031;
2.
东南大学交通学院, 江苏, 南京 210096

基金项目: 国家自然科学基金项目（51178395）

详细信息

作者简介:
宋帅(1987-),男,河南人,博士生,主要从事桥梁易损性研究(E-mail:shuaissw@126.com)

通讯作者:
钱永久(1963-),男,湖北人,教授,博士,博导,主要从事既有结构的检测与加固研究(E-mail:yjqian@sina.com);吴刚(1988-),男,江西人,博士生,主要从事桥梁结构抗震研究(E-mail:wugang523@126.com)

中图分类号: U441;U442.55
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- 文章访问数: 379
- HTML全文浏览量: 34
- PDF下载量: 168
出版历程
- 收稿日期: 2015-12-27
- 修回日期: 2016-05-28
- 刊出日期: 2017-01-24

MIXED COPULA FUNCTION METHOD FOR SEISMIC FRAGILITY ANALYSIS OF BRIDGE SYSTEM

1.
School of Civil Engineering, Southwest Jiao tong University, Chengdu, Sichuan 610031, China;
2.
School of Transportation, Southeast University, Nanjing, Jiangsu 210096, China

摘要

摘要: 为了在桥梁系统易损性分析中考虑构件地震需求之间相关性的影响，采用贝叶斯加权平均方法构造混合Copula函数，将构件地震需求之间的相关结构和各构件的边缘分布函数进行分离；结合增量动力分析，建立了桥墩、支座等单个构件的易损性曲线及联合分布函数，提出了考虑构件地震需求相关性的桥梁系统易损性分析方法。结果表明：混合Copula函数能够准确描述构件地震需求间上、下尾相关并存的非对称相关结构，简化构件地震需求联合分布函数的建模过程；与Monte Carlo抽样方法相比，二者得到的桥梁系统易损性吻合良好，且混合Copula函数方法避免了大量的数值抽样，显著提高系统易损性分析的计算效率。
- 桥梁工程 /
- 系统易损性 /
- 混合Copula函数 /
- 贝叶斯加权平均 /
- 非线性相关结构
Abstract: In order to consider the impacts of seismic demand dependence among structural components in the seismic fragility analysis of bridge system, a mixed Copula function is constructed by using Bayesian Model Average method, and then the dependence structure is separated from the marginal distribution functions of components. In combination with incremental dynamic analysis, the fragility curves and joint distribution functions of piers and bearings are developed. And a method for calculating the fragility of bridge system is proposed, which takes the seismic demand dependence among structural components into consideration. The results indicate that mixed Copula function can accurately depict the asymmetric dependence between the upper and lower tail distributions of the seismic demands of bridge components and simplify the modeling procedure of joint probability distribution function. A comparison between the system fragility curves obtained by the proposed method and those derived using Monte Carlo method shows good agreement. In addition, the computational efficiency is significantly improved by the mixed Copula function method because it significantly reduces the number of numerical samples.
- bridge engineering /
- seismic fragility of system /
- mixed Copula function /
- Bayesian Model Average /
- nonlinear dependence structure

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参考文献(27)

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文章访问数: 379
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桥梁系统地震易损性分析的混合Copula函数方法

作者简介: 宋帅(1987-),男,河南人,博士生,主要从事桥梁易损性研究(E-mail:shuaissw@126.com)

通讯作者: 钱永久(1963-),男,湖北人,教授,博士,博导,主要从事既有结构的检测与加固研究(E-mail:yjqian@sina.com);吴刚(1988-),男,江西人,博士生,主要从事桥梁结构抗震研究(E-mail:wugang523@126.com)

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MIXED COPULA FUNCTION METHOD FOR SEISMIC FRAGILITY ANALYSIS OF BRIDGE SYSTEM

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目录

作者简介:
宋帅(1987-),男,河南人,博士生,主要从事桥梁易损性研究(E-mail:shuaissw@126.com)

通讯作者:
钱永久(1963-),男,湖北人,教授,博士,博导,主要从事既有结构的检测与加固研究(E-mail:yjqian@sina.com);吴刚(1988-),男,江西人,博士生,主要从事桥梁结构抗震研究(E-mail:wugang523@126.com)