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箱梁在偏心荷载作用下产生刚性转动和截面歪扭，箱梁在局部横向弯曲时产生横向弯曲应力，通过箱梁应力分析，采用SAP程序和桥梁综合计算程序可对横向弯曲应力和横向预应力束的配置进行计算。
The box girder produces rigid rotation and cross-section distortion under the eccentric load. The box girder produces transverse bending stress in the local transverse bending. Through the stress analysis of the box girder, the SAP program and the bridge comprehensive calculation program can be used to calculate the transverse bending stress and transverse prestress Beam configuration is calculated.