福州市城市桥梁疲劳荷载研究

Research on the fatigue load spectrum for steel bridge in Fuzhou

通过对福州市城市桥梁交通荷载和运营车辆的装载情况调查,得到由32类日常典型的运营车辆组成的荷载频值谱,以及货运车辆的空载率.根据等效疲劳损伤原理将所得到的荷载频值谱简化为由6辆疲劳荷载模型组成的具有实用性的荷载频值谱.进一步分析得到一辆适宜验算桥面系构件的标准疲劳车辆荷载模型.所得到的疲劳荷载频值谱和疲劳车辆荷载模型,可以供城市钢桥疲劳损伤验算参考.

Through investigating the traffic loads of city bridge and loading conditions of vehicle opera- tors in Fuzhou, obtained a load frequency value spectrum which including 32 types of daily vehicle operators and the empty - loading ratio. According to the theory of equivalent fatigue damage, we can simplified the frequency value spectrum to the practical one by 6 consists of the fatigue load models. After further analysis of vehicle load, we can set up a standard fatigue - loaded vehicle model which is suitable for checking component of deck system. This can be used as references for bridge fatigue dam- age calculation or fatigue design of other steel bridges in Fuzhou.