中文摘要：

从承载能力极限状态出发,推导出结构承载力与偏心距e呈单调递减关系,引入偏心距系数的概念——e/[e0],通过比较加固前后控制截面的偏心距系数,进行加固设计方案比选及加固效果评价,并依托工程实例进行了说明,以期对圬工拱桥加固设计方案比选和加固效果评价提供借鉴和参考。

英文摘要：

From the ultimate limit state,it is deduced that the structure of the bearing capacity and eccentricity monotonically is a decreasing relationship,then the concept of eccentricity factor-e/[e0]is introduced,eccentricity factors of the control section before and after reinforced are compared,thereinafter the reinforcement design solutions and effect are compared and evaluated.Based on an engineering example descriptions are made which could provide reference for similar projects in future.