大跨桥梁持续环境荷载的时变效应与服役性能评估  

Time-Varying Effects and Service Performance Evaluation for Long-Span Bridges Under the Effects of Continuous Environmental Loads

作　　者：伊廷华[1] 王浩[2] 丁幼亮[2] 安永辉[1] 任亮 Yi Tinghua;Wang Hao;Ding Youliang;An Yonghui;Ren Liang(School of Civil Engineering,Dalian University of Technology,Dalian 116023;School of Civil Engineering,Southeast University,Nanjing 210096)

机构地区：[1]大连理工大学土木工程学院,大连116023 [2]东南大学土木工程学院,南京210096

出　　处：《中国基础科学》2019年第6期44-48,共5页China Basic Science

基　　金：973计划项目2015CB060000。

摘　　要：大跨桥梁是交通运输网络的关键结点,桥梁结构自建成伊始就暴露在持续环境荷载的耦合作用下。不同于极端环境荷载作用下的骤变破坏机理,桥梁结构在持续环境荷载作用下的性能衰变往往不容易引起工程与管理人员的重视,桥梁的临界破坏点更是难以把控。着眼于重大桥梁基础设施全寿命设计安全性的国家973计划青年科学家项目"大跨桥梁持续环境荷载的时变效应与服役性能评估",为揭示持续环境荷载作用下大跨桥梁的形变—损伤—破坏—倒塌的基本发展规律提供重要理论支撑。Long-span bridges are the key nodes of the transportation network. The bridge structure has been exposed to the coupling effects of multiple continuous environmental loads since its construction completed. Different from the sudden failure mechanism of structure under the effects of extreme environmental loads, the performance decay of bridge structures under the effects of continuous environmental loads is often not easy to attract the attention of engineering and management personnel. Moreover, the critical failure point of bridges is difficult to capture. The National 973 Program "Time-varying effects and service performance evaluation for long-span bridges under the effects of continuous environmental loads" focuses on the life-cycle design safety of major bridge infrastructures. It provides important theoretical support for revealing the deformation, damage, destruction, and collapse law of long-span bridges under the effects of continuous environmental loads.

关 键 词：大跨桥梁 持续环境荷载 时变效应 服役性能 

分 类 号：TU1[建筑科学—建筑理论]