摘要
为了改善当前规范中不考虑多种灾害效应组合的现状,分析了多灾害桥梁设计理论的发展,总结了当前面临的挑战主要在于随机概率函数的获取、非正态函数的正态化以及荷载组合系数的优化。介绍了基于概率论的多种灾害作用下桥梁的设计框架、用失效概率理论进行多灾组合以及生命周期风险评估方法等。针对多灾害桥梁设计方法的发展进行了展望,需不断完善桥梁极端事件极限状态公式,着重考虑多种极端荷载的时变特性和其产生的级联危害。
In order to improve the current situation in which multiple disaster effect combinations are not considered in the current specification,the development of multiple-hazard bridge design theory was analyzed,and the current challenges that lie mainly in the acquisition of stochastic probability functions,the normalization of non-normal functions and optimization of load combination coefficient were summarized. The design framework of bridges under multiple disasters based on the theory of probability,the application of failure probability theory for the combination of multiple hazards and life cycle risk assessment methods were introduced. Finally,the development of multiple-hazard bridge design method was prospected. It is necessary to continuously improve the limit state formula of bridge extreme events,and to consider the time-varying characteristics of various extreme loads and the cascading hazards generated.
作者
马婧
周应新
汪永林
袁万城
党新志
Ma Jing;Zhou Yingxin;Wang Yonglin;Yuan Wancheng;Dang Xinzhi(State Key Laboratory of Disaster Reduction in Civil Engineering,Tongji University,Shanghai 200092,China;Yunnan Wuyi Highway Constraction Headquarters,Kunming 650300,China)
出处
《建筑结构》
CSCD
北大核心
2018年第S2期948-952,共5页
Building Structure
基金
土木工程防灾国家重点实验室基金项目(SLDRCE14-B-14)
国家自然科学基金项目(51478339
51778471)
关键词
多灾害
极端荷载
荷载组合
失效概率
桥梁抗震
multiple-hazard
extreme load
load combinations
failure probability
seismic response of bridge
