Abstract
Through the finite element software abaqus, the finite element model of prefabricated segmental box girder with one joint and three spans(42m+66m+ 42m)in the section from the airport expressway to XinZheng is established. It is demonstrated that the stress of the box girder and the stress between joints are in the safe range during the symmetrical splicing construction of middle piers. By changing the value of the pre-stress, the influence of pre-stress on the mechanical performance of the box girder in the construction stage is discussed.As a result, during the construction process, the roof pre-stress has a bigger impact on the construction stage than the web pre-stress, and it is proposed that the loss of pre-stress should be reduced during the construction stage.
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