一、概述连续弯箱梁桥是一空间结构,受力状况复杂。国内外应用分析已经证明,其顶板内的横向弯矩较大且分布不均匀。在现行设计中采用的近似法不能反映横向变形(畸变)及其内力的分布规律,所设计的箱梁截面和钢筋布置往往不符合结构的实际工作状态,出现裂缝的情 I. Overview Continuous curved box girder bridge is a spatial structure, the force situation is complicated. Application analysis at home and abroad has proved that the transverse bending moment in the roof is larger and unevenly distributed. The approximation method adopted in the current design can not reflect the distribution law of lateral deformation (distortion) and its internal force. The designed box girder section and reinforcement arrangement often do not conform to the actual working condition of the structure,