Numerical Analysis on Vertical Prestress Loss of PC Continuous Prestressed Girder Bridge

Through the numerical simulation of the actual bridge,the study in the Paper shows that the inadequacy or excessive loss of vertical prestress is the main cause of diagonal crack on the web.It is concluded in the Paper that if the webs' transition stops in the adjacent three segments,it will greatly decrease the principal tensile stress loss and in certain extend minimize the mutation of principal tensile stress.