Review, Evaluation, and Revision of ATC-20 Postearthquake Building Safety Evaluation Procedures

这是1989年10月洛马普列塔地震后的一个调查项目，旨在从这次破坏性事件中吸取教训。应用技术委员会（ATC）于1989年9月19日发布的ATC-20“震后建筑物安全评估程序”在北加州广泛使用，用于评估1989年10月17日加利福尼亚洛马普里塔7.1级地震中受损的建筑物。来自全州的建筑官员和志愿结构工程师在数千座建筑物上广泛应用了该方法，这为评估该方法的优点和可能存在的缺陷提供了难得的理想机会。​基于这样的经验，本项目将进行一项研究，以审查，评估，并可能修订ATC- 20。具体目标是：(1)记录ATC-20方法的应用；(2)举办研讨会，审查、扩展和评价本文件，并提出改进程序的建议；(3)制定并发布ATC-20报告的附录，其中包括洛马普列塔地震经验总结、项目研讨会结果总结、对“难以确定”的张贴情况的附加说明和澄清，以及为当地建筑官员推荐的管理方案；(4)必要时修订并重新出版《ATC-20报告》和《ATC-20-1现场手册》；(5)举办培训研讨会，概述洛马·普里塔的经验。这项工作将加强地震后建筑物安全评价的方法。

This is a post Loma Prieta earthquake (Oct. 1989) investigation project in learning from this damaging event. The ATC-20 "Procedures for Postearthquake Safety Evaluation of Buildings," published by Applied Technology Council (ATC) on September 19, 1989, were used extensively throughout Northern California to evaluate buildings damaged by the magnitude-7.1 October 17, 1989 Loma Prieta, California, earthquake. The widespread application of the methodology on several thousand buildings by building officials and volunteer structural engineers from throughout the state has provided a rare and ideal opportunity to assess the merits and possible pitfalls of the methodology. Based upon such an experience, this project will conduct a study to review, evaluate, and possibly revise the ATC- 20. The specific objectives are to: (1) document the application of the ATC-20 methodology; (2) conduct a workshop to review, expand, and evaluate this documentation and develop recommendations for improved procedures; (3) develop and publish an addendum to the ATC-20 Report containing a summary of the Loma Prieta earthquake experience, a summary of the project workshop findings, additional instructions and clarifications for "difficult to determine" posting situations, and a recommended management program for local building officials; (4) revise and re-publish, if necessary, the ATC-20 Report and ATC-20-1 Field Manual; and (5) conduct training seminars that include an overview of the Loma Prieta experience. This effort will enhance the methodology for safety evaluation of buildings following an earthquake.