城市桥梁抗震的中日设计规范比较

摘要:

随着我国人口加速向中心城市和城市群聚集,城市交通问题日益突出。城市桥梁作为城市生命线的重要环节,防灾减灾能力有待提高。通过对中日两国在城市桥梁抗震设计规范进行对比分析,结合日本规范的发展变迁的历程,针对我国城市桥梁抗震方面的特点,找寻提升抗震性能的具体方法。对提高支座的水平承载力,减少滑动支座的使用,构建多道防线的抗震措施,改进墩柱配筋,防止地震时桥梁侧向倾覆等问题进行探讨。

Abstract:

With the acceleration of population aggregation to central cities and urban agglomerations in China, urban traffic problems have become increasingly prominent. As an important part of urban lifeline, the capability of disaster prevention and reduction of urban bridges needs to be improved. Based on the comparative analysis of seismic design codes of urban bridges between China and Japan, combined with the development and change of Japanese codes, and in view of the seismic characteristics of urban bridges in China, the specific methods to improve the seismic performance are found. This paper discusses some problems, such as improving the horizontal bearing capacity of bearings, reducing the use of sliding bearings, constructing seismic measures of multiple lines of defense, improving the reinforcement of pier columns, and preventing the bridges from lateral overturning in earthquake.