基于响应面法的连续刚构地震可靠度分析

英文篇名：Seismic reliability analysis of rigid frame bridge based on response surface method
中文刊名：地震工程与工程振动
英文刊名：Journal of Earthquake Engineering and Engineering Vibration
作者：陈文元 ; 赵雷 ; 钟强文 ; 陈兵
英文作者：CHEN Wenyuan1 ; ZHAO Lei1 ; ZHONG Qiangwen2 ; CHEN Bing1 ; 2(1.Institute of Civil Engineering ; Southwest Jiaotong University ; Chengdu 610031 ; China ; 2.Chengdu Municipal Engineering Desgn and Research Institute ; Chengdu 610065 ; China)
中文关键词：响应面法 ; 地震可靠度 ; 反应谱 ; 随机参数 ; 连续刚构
英文关键词：response surface method ; seismic reliability ; response spectrum ; random parameters ; rigid frame
出版日期：2009-06-15
机构：西南交通大学土木工程学院;成都市市政工程设计研究院;
年：2009
期：03
出版单位：地震工程与工程振动

摘要

地震可靠度是桥梁抗震研究中的重要问题。基于随机分析的响应面理论和规范反应谱法,提出了一种分析具有随机结构参数的桥梁地震可靠度的方法,研究了结构的破坏准则及其极限状态方程,计算了高墩大跨连续刚构桥在地震激励下设计基准期内的动力可靠度。分析时考虑了结构参数和场地土的随机性,分别计算了连续刚构在多遇地震、设防地震和罕遇地震作用下的失效概率,得到了结构在设计基准期内,"三水准设防标准"条件下的地震可靠度。结果表明,该桥设计满足抗震规范要求。
Seismic reliability is very important to the seismic design and the study of the bridge.Based on the theory of the response surface of random vibration and response spectrum method,an algorithm for the seismic reliability analysis of the structures with random parameters is proposed.The structural failure criteria and the equations under their limit states are studied and the dynamic reliabilitiy of the high-pier and long-span rigid frame subjected to seismic excitation in its design basic period is computed.The random of the structure parameters and the site condition of this bridge is taken into account when it's failure seismic reliability is computed for the low-level earthquake,design earthquake and high-level earthquake respectively.According to the "three-level seismic fortification criterion" in the code for seismic design of bridge,the seismic reliabilitiy of the bridge is calculated in their design basic period.The conclusion shows that the design of this bridge meets the demands of the seismic code.

引文

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