【摘要】 以洋安大桥主桥5跨预应力混凝土变截面连续箱梁桥为背景,对其横向应力分别采用传统的平面框架法和空间有限元法进行分析比较,结果表明大部分关键截面平面框架法得到的横向应力远大于空间有限元法,在实际设计计算中须谨慎使用平面框架法。更多还原

【Abstract】 <Abstrcat>Take a five span prestressed concrete box girder bridges of Yang An Bridge as a example,the transverse internal force is calculated by two different methods,respectively the conventional plane frame method and the spatial finite element method.The result of most caculation shows that the transverse internal stresses obtained by the plane frame method are much larger than those by the spatial finite element method in a majority of crucial position.So it is recommended that it should be cautious to use the plane frame method in actual design of box girder bridge.更多还原