A case study of a large span pre-stressed concrete continuous rigid frame bridge(Ba-Mao-Chong bridge)of GUI DU high speed railway.Finite element program Midas/Civil is used to simulate the construction process and operation phase,the influence of concrete overweight,pre-stressing loss,concrete shrinkage and creep,stiffness loss and other factors that related the long-term deflection of bridge are analyzed.The calculation results show that:(1)The overweight concrete and Bridge deck pavement construction error could cause the bridge long-term deflection increases.(2)The creep coefficient,environment humidity,and other factors on the bridge have significantly influence on long-term mid-span deflection,(3)The beam stiffness reduction could lead to the bridge long-term mid-span deflection increase.
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