Author(s)

Bin Liu, Tian Wang and Yong Liu

Corresponding Author

Yong Liu

ABSTRACT

In order to study vehicular fatigue load spectrum for highway bridges，based on the vehicle data collected from the weight-in-motion (WIM) system on a certain bridge in Foshan city, Guangdong, the characteristic parameters, such as vehicle weight, wheelbases of vehicles and total weight and so on, are statistical analyzed. The vehicle is first simplified to ten types by the axis number and axis group type. Then, the axis weight, the wheelbases and weight of vehicles and lane parameters are analyzed in detail. Finally, vehicular fatigue load spectrum and Lane transverse distribution coefficient is decided based on the equivalent fatigue damage theory. The results indicated that the scheme proposed to determine vehicular fatigue load spectrum on highway bridges based on data acquisition of WIM system is accurate and effective, and can be directly used for the evaluation of the remaining fatigue life of the bridge in Foshan city, Guangdong. This proposed scheme could be further used to provide efficient reference for fatigue design and evaluation of the fatigue life of highway bridges under such a similar vehicle load, and to provide scientific guideline for the standard establish on vehicular fatigue load spectrum for highway bridges.

KEYWORDS

Highway bridge; fatigue load spectrum; vehicle model; weight-in-motion system