【摘要】 简述预应力折线形铰接钢拱主动加固拱桥的应用背景、加固方式和加固原理.基于有限元分析,从偏心距、弯曲能、控制截面内力等方面具体讨论各主要加固参数对加固效果的影响,分析得出铰座数量、铰座位置、预加力大小等对加固效果的影响程度和影响规律,以期为使用该法加固拱桥的工程设计提供依据.更多还原

【Abstract】 This paper introduces the application background,strengthening procedure and mechanical principle for the method of prestressing piecewise hinged steel arch ribs.Based on the finite element analysis,the effects of the main design parameters on the strengthening of arch bridges are discussed from the aspects of eccentricity,bending energy and internal force of the control sections.The rule and extent of how the the hinge number,the hinge position and the prestressing force influence the strengthening of existent arch bridges are obtained,so as to provide an engineering design basis for the rehabilitation of arch bridges.更多还原