W. Phillip Yen  （美国国家公路联邦总署，华盛顿，美国）

[摘要]  本文通过一系列全面综合的抗震研究项目，简要介绍了美国在交通结构物的抗震防护领域取得的研究进展。这个项目由1991年的交通权益法案( TEA)启动，历经三个交通权益法案(TEA)时代，研究任务的投入累计达3600万美元。项目重点关注三个基本问题：第一，适用于所有新建公路项目的抗震设计最新规范；第二，适用于所有现存公路建设项目的抗震加固手册；第三，启动系统风险分析项目，评估运用网络系统方法设计的道路系统的地震损失。良好的预防措施是减少或规避公路设施地震损失最重要的因素。
[关键词]  抗震设计；桥梁工程；抗震加固；抗震研究；地震损失评估
中图分类号：TU997    文献标识码：A  文章编号：1002-848X(2012) Sl-0009-05

Earthquake hazard mitigation of transportation structures
W. Phillip Yen
 ( Federal Highway Administration, Washington D C, USA )

Abstract: It is to briefly introduce the efforts in the US in earthquake hazard mitigation of transportaUon structures through a thorough and comprehensive seismic research program. This program initiated in the 1991's Transportation Equity Acts (TEA) and has been working through three TEAs and funded more than $36 millions in research tasks. The program focuses on three fundamental issues, which includes:1)a state-of-the-art's specifications in seisnuc design for all new lughway constructions;2)a state-of-the-practice'8 manuals in seisrmc retrofitting for all existing highway constructions; 3)a systematic risk analysis program to estimate the earthquake loss of the roadway system using network system approach. The most important factor to reduce or mitigate the earthquake loss of the lughway infrastructure is through a well preparedness, including those above three items.
Keywords: earthquake design; bridge engineering; seismic retrofitting; seisnuc research; earthquake loss estimations

    参考文献
[ 1 ]  AASHTO. Bridge seismic design guide specifications [S].
[ 2 ]  FHWA. Seismic retrofitting manual for highway structures-part I Mdges [M]. FHWA-HRT-06-032, Mclean, VA.
[ 3 ] REDAR,S 2: Methodology and software for seisnuc risk analysis of highway systems [M]. MCEER Publication in 2006.