采用有限元软件对某大跨径连续刚构桥进行空间理论计算,分析了体外预应力索加固后的桥梁应力、承载力、挠度变化规律,并和加固前的原桥线形进行对比分析,计算结果和现场实际监测结果基本吻合,验证采用考虑桥梁的纵向抗弯加固效应的计算方法和空间钢束布置方法的合理性,研究计算方法可供同类工程参考借鉴。 The finite element software was used to calculate the spatial rigidity of a long-span continuous rigid-frame bridge. The stress, load-carrying capacity and deflection of the bridge after reinforcement were analyzed and compared with those of the original bridge before reinforcement The results are basically in line with the actual monitoring results in the field. The calculation method considering the longitudinal bending reinforcement effect of the bridge and the rationality of the spatial steel beam arrangement method are used to verify the method. The research and calculation methods are of reference for similar projects.