Performance of Concrete Parking Garages in January 17, 1994 Northridge Earthquake

9411759霍金斯在1994年1月毁灭性的北岭地震中，许多预应力建筑类型的停车场发生了意想不到的破坏。 这种损坏揭示了严重的问题，即这种结构在重力和横向负载阻力方面的设计是否充分。 从研究地震反应或从事后现场调查收集的破坏数据中可以吸取重要的工程经验教训。 在预应力/预制混凝土行业和贸易协会的协助下，首席调查员进行了全面的实地调查，并收集了一套相当完整的有关停车场结构及其损坏的相关数据/信息。 该项目将能够进行深入研究，以解决以下一些关键问题：（1）确定观察到的损坏的原因并确定共同特征，（2）确定现有车库的地震风险，（3）建议必要的建筑法规修改。 由于预期学习的重要性，这一探索性研究项目的小额赠款得到了支持，作为国家减少地震灾害计划震后调查活动的一部分。 ***

9411759 Hawkins During the devasting Northridge earthquake in January 1994, unexpected damage occurred to many parking garages of various prestressed construction types. Such damage revealed serious questions as to the design adequacy in terms of gravity as well as lateral load-resistance of such structures. Important engineering lessons could be learned from studying the earthquake response or damage data collected from post-event field investigations. The Principal investigator, with assistance provided by the prestressed/precast concrete industry and trade association, conducted a comprehensive field investigation and has collected a rather complete set of relevant data/information pertaining to parking garage structures and their damage. This project will enable an indepth study to be carried out to address some of the critical issues as follows: (1) to determine reasons for observed damages and identify common features, (2) to determine seismic risk to existing garages and (3) to recommend necessary building code changes. This Small Grant for Exploratory Research project is supported, due to the importance of the anticipated learning, as a part of the National Earthquake Hazards Reduction Program's Post- earthquake investigation activity. ***