Overall Vehicle Load Response Characteristic of Multi span Cable stayed Bridge Under Stochastic Traffic Flow

Abstract:

A case study was made of a three pylon cable stayed bridge to investigate the overall vehicle load response of multi span cable stayed bridge under stochastic traffic flow by resorting to the advanced vehicle load research technology, and the differences between the actual and design load responses were also compared. Results show that the current bridge criterion (JTG D60—2004) overvalues the vehicle load response for multi span cable stayed bridge; parameters such as traffic condition and traffic properties of average daily traffic volume and truck ratio affect the response indirectly; different load effects present different sensitiveness to stochastic traffic flow. The results indicate the current load model cannot reflect the actual vehicle load responses in load value as well as loading range, thus, multi parameter and multi level performance based design can be taken into consideration to establish load model reflecting actual traffic condition.