预应力混凝土连续箱梁桥腹板主拉应力的计算与分析

Calculation and Analysis of the Principal Tensile Stress of the Web Plate for the Prestressed Concrete Continuous Box Girder Bridge

以湖北随岳中汉江特大桥南岸堤桥为工程背景,采用有限元软件对该桥控制截面施工阶段以及运营阶段的箱梁腹板进行主拉应力的计算和分析。结果表明,主拉应力值都在规范允许值之内,为该桥在施工及运营过程中腹板是否产生斜裂缝以及结构使用的安全可靠性提供了理论依据。

It takes the south bank bridge of the Hubei Suiyuezhong Hanjiang bridge as the engineering background, applies the finite element software to calculating and analyzing the principal tensile stress of the control section of the box girder web plate in the construction stage and using stage. The result indicates that the principal tensile stress is in the allowable values of criterion, and offers the theory basis of whether the ramp cracks exists and the structure is safe in the：construction and using stage.