Research on Stress Level and Stress Limit Value of Prestressed Concrete Bridges under Serviceability Limit States

At present, factors that affecting the concrete crack have been thoroughly researched and applied to actual design, but research of stress limit when the concrete box girder was under multidirectional forced is rare. This paper takes Lan Zhang Tian Bridge as engineering background, using the finite element software to simulate plane and spatial numerical analysis to explore its internal force distribution law under serviceability limit state. The results of concrete stress limits can be used to solve the frequent cracking problem, and views about tension and compressive stress limits in existing code are discussed in this paper.