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分离式箱梁桥中,由于在偏心荷载作用下每个箱梁的挠度不一致及箱梁的扭转,将引起箱梁联接板中有较大的横向弯曲应力。本文对横向应力采取两步分析方法:首先沿梁长取出单位宽度作为位于刚性支座上无侧移的平面框架计算,然后消除假想支座的影响。在第二步计算中对联接板采用薄板小挠度理论与主梁的变形建立联立方程组求解。整个计算过程编制了电算程序。计算結果与模型试验结果符合较好.
In the split box girder bridge, due to the inconsistent deflection of each box girder and the torsion of the box girder under the eccentric load, it will cause greater transverse bending stress in the box girder joint plate. In this paper, a two-step analysis of transverse stress is taken. Firstly, the unit width along the beam length is taken as the plane frame with no lateral displacement on the rigid support, and then the influence of the virtual support is eliminated. In the second step, the joint plate is solved by using the small deflection theory of thin plates and the deformation of the main girder. The entire calculation process compiled a computer program. The calculated results are in good agreement with the model test results.