【摘要】 中国和美国都即将推出新一代的桥梁抗震设计规范。经过多次修订的美国桥梁抗震规范是一套真正意义上的基于性能要求的结构设计规范,代表了未来结构设计规范的发展方向。《AASHTO桥梁抗震指南》中第一次明确提出了合理抗震体系的概念,并且通过传力路径上的抗震单元以及位移限制和连接措施保证了抗震体系基本特征的实现。从美国规范中汲取经验、吸收先进的研究成果,并对我国的规范进行适当的修订和调整是有着重要意义的。本文在对两本规范中与桥梁抗震体系相关内容进行分析比较的基础上,通过对合理抗震体系的特征和各组成部分进行系统剖析,以期阐明桥梁抗震体系的合理设计,并为我国新抗震规范的修订以及桥梁工程师的抗震设计提供参考。更多还原

【Abstract】 Both of China and America are going to pulish the new bridge seismic design specifications.The American bridge seismic specification which has been revised many times is a real set of structure design specifications on the basis of performance requirement.It represented the developing direction of the structure design specification in the future.The AASHTO Guide Specifications for LRFD Seismic Bridge Design provides the reasonable Earthquake Resistance System explicitly for the first time.It also provides Earthquake Resistance Element on the load path and displacement restraint and connection means to achieve the basic characteristic of Earthquake Resistance System.Therefore,it’s a matter of great significance to draw experience and absorb the advanced research results into our country’s specifications revising work from USA’s.Based on the analysis and comparison work on the two codes as mentioned above about the associated content of earthquake resistance system of bridge structure,the reasonable design of bridge earthquake resistance system is clarified by systemically analyzing the characteristics and components of reasonable earthquake resistance system,and the reference is provided for the revision of new bridge seismic design specifications and the bridge seismic design of bridge engineer of our country.更多还原