摘要
车辆荷载反复作用下的疲劳损伤是影响钢桥运营安全和耐久性能的重要控制因素。新桥疲劳设计和既有桥梁评估应采用疲劳荷载。目前我国的桥梁规范还没有疲劳车辆荷载的取值规定。本文详细阐述了我国桥梁疲劳车辆荷载的疲劳设计状况和研究现状,系统介绍了几个发达国家桥梁疲劳车辆荷载的规范规定及其最新研究进展。本文还就建立适合我国国情的基于动态车辆称重WIM(Weigh-in-Motion)数据的车辆疲劳荷载模型或荷载谱作了初步的探讨性研究。
Fatigue phenomenon caused by numerous repeated cyclic stresses due to traffic loading is one of the main dominant factors that affects the fatigue reliability and durability of highway steel bridges. It is the fatigue loading, not the design loading at the worst cases that should be considered for evaluating existing bridges and new bridge fatigue design. At present, there are no any specifications about fatigue loading in China for the design of steel bridges. In this paper, the progress in study of fatigue loading for highway bridges in China and abroad is introduced. The development of the fatigue-load spectrum and fatigue-load model for the situation of China from measurements of WIM （Weigh-in-Motion） data is discussed.
出处
《建筑钢结构进展》
2009年第2期35-39,共5页
Progress in Steel Building Structures
基金
中国博士后科学基金(20070420661)
浙江省自然科学基金(Y1080011)
上海博士后科学基金(07R214132)
浙江高校青年教师资助计划
浙江林学院科学研究发展基金
关键词
钢桥
车辆荷载
疲劳荷载
WIM
steel bridge
traffic loading
fatigue loading
WIM
