Assessment of Performance of Modern Bridges in the 1999 Chi-Chi, Taiwan Earthquake

1999年9月21日的集集地震对整个台湾中部的交通系统造成了广泛的破坏和中断。震中地区的桥梁经历了严重的地面运动，在许多情况下，大断层偏移。 对地震中桥梁的彻底调查将有助于降低美国公路系统的地震风险。 这两个国家使用类似的桥梁结构系统，并在台湾，大断层运动预计在美国西部本项目涉及收集数据损坏和倒塌的桥梁在台湾和分析数据，以评估桥梁性能。 该项目的任务是：（1）记录桥梁的损坏情况;（2）将断层运动和强地面运动记录与观察到的损坏情况联系起来;（3）开发选定桥梁的非线性动力分析模型，以评估性能和损坏模式;（4）确定影响性能的因素;（5）为美国桥梁抗震设计规范提出建议;（6）为具体的研究需要提出建议;（7）在报告中和万维网上公布研究结果，包括进入数据库。 特别值得调查的是1980年以后建造的桥梁，包括茂罗市高架桥和吉卢斜拉桥。

The 21 September 1999 Chi-Chi earthquake caused widespread damage and disruption to the transportation system throughout central Taiwan. Bridges in the epicentral region experienced severe ground motion and in many cases large fault offset. The thorough investigation of bridges in the earthquake will help reduce the seismic risk of the highway system in the United States. The two countries use similar structural systems for bridges and, as in Taiwan, large fault movement is expected in the western U.S. This project involves collecting data on damaged and collapsed bridges in Taiwan and analyzing the data to evaluate bridge performance. The tasks of the project are to: (1) document damage of bridges; (2) correlate fault movement and strong ground motion records with observed damage; (3) develop models for nonlinear dynamic analysis of selected bridges to assess performance and damage modes; (4) identify the factors affecting performance; (5) develop recommendations for U.S. specifications for seismic design of bridges; (6) develop recommendations for specific research needs; (7) publish findings in a report and on the World Wide Web, including access to databases. Of particular interest for investigation are bridges built after 1980, including the Mao-loh-shi viaduct bridge and the Ji-lu cable-stayed bridge.