摘要
通过研究恶劣天气对桥梁构件疲劳累积的影响，利用基于米勒准则的疲劳损伤模式计算了台风载荷下和正常交通载荷下的疲劳累积率，分别比较了桥梁结构的关键构件在台风期间和正常天气下时域内和频域内的应变响应，指出台风载荷对疲劳损伤累积的影响远远超过了正常交通载荷的影响。
The article aims to investigate the effect of typhoon loading on the fatigue damage accumulation in steel long-span bridges. The fatigue damage models based on Miner＇ s law is applied to calculate the increment of fatigue damage due to the action of the typhoon and normal traffic. The comparison of strain response in time domain and frequency domain during the typhoon and normal traffic is carried out respectively. The increment of fatigue damage generated by hourly stress spectrum for the maximum loading may be much greater than that by daily stress spectrum for normal traffic loading.
出处
《山西建筑》
2006年第21期282-283,共2页
Shanxi Architecture
关键词
疲劳累积率
大跨桥梁
应变时程
fatigue damage increment, long-span bridge, strain histories
