利用引桥承担部分水平推力加固的刚架拱桥二次加固设计

Secondary Reinforcement Design for Rigid Frame Arch Bridge with Approach Bridge Bearing Part of Horizontal Thrust

结合工程实际需求,对一座利用引桥T梁承担部分水平推力的刚架拱桥进行病害成因计算分析。结果表明:为承担刚架拱水平推力而在T梁上增加纵向连续支撑梁后,改变了T梁原有的受力形式,导致其横隔板受力增大甚至开裂。针对桥梁产生的病害,对桥梁进行加固设计,为类似工程提供借鉴参考。

In accordance with the actual needs of projects,a rigid frame arch bridge that uses the approach T beam to bear part of the horizontal thrust has been calculated and analyzed for the cause of the disease.The results have shown that the addition of longitudinal continuous support beams to the T beam to bear the horizontal thrust of the rigid frame arch could change the original force form of the T beam,resulting in an increase in the force of the transverse diaphragm and even cracking.In view of the diseases caused by the bridge,the reinforcement design of the bridge has been carried out to provide references for similar projects.