在公路桥梁的抗震设计过程当中,相关的设防指标是其中的关键性环节,深入的对其进行研究和分析,将是对桥梁抗震性的有力保障。文章将针对这一方面的内容展开论述,详细的分析了桥梁抗震设计的设防指标,对其中的一些重、难点进行了细致的阐述,力求更进一步的加强实践当中的操作和应用,为相关技术的进步做出积极的贡献。 In the process of seismic design of highway bridges, the related fortification index is one of the key links in the study. After thorough research and analysis, it will be a strong guarantee for the seismic performance of bridges. This article will discuss the contents of this aspect, detailed analysis of the fortification indicators of the bridge seismic design, some of the heavy and difficult to elaborate, and strive to further strengthen the practice of the operation and application for the relevant technology Make a positive contribution to the progress made.