Damage Analysis of Ground-Based and Elevated Tanks During the 1989 Loma Prieta Earthquake

1989 年洛马普列塔地震期间地面和高架储罐的损坏分析

• 批准号: 9011159
• 负责人: Medhat Haroun
• 金额: $ 7.01万
• 依托单位: University of California-Irvine
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1990
• 资助国家: 美国
• 起止时间: 1990-05-15 至 1991-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9011159&HistoricalAwards=false
• 关键词: Damage; Analysis; Ground; Based; Elevated

This is a post-event investigation project to learn engineering lessons from the Loma Prieta earthquake (October 1989). The Loma Prieta earthquake induced munerous incidents of damage to both ground-based and elevated tanks, and even to some of the retrofitted tanks. In particular, site amplification of long period ground motion components appears to be the cause of large amplitude sloshing and associated damage to tanks built on Bay Mud. In this project the data collected will be analyzed to evaluate the performance of tank structures. The tasks include: (1) collection of data and documentation of the damage sustained by ground-based water and petroleum storage tanks and by elevated water storage tanks, (2) calculation of the dynamic response of representative tanks and correlation of the computed response with observed damage or lack of damage, (3) study of the effects of site amplification of long period components on the sloshing phenomenon and on rocking motion of tanks founded on Bay Mud, (4) study of the damage to retrofitted tanks to deduce the reasons for the ineffectiveness of the implemented retrofit mechanisms, and (5) comparison of induced seismic forces with those specified by available codes and standards such as API 650, AWWA 100 and UBC. By comparison of the predicted response with actual behavior under earthquake loading, the analytical methods developed for response calculation of tanks will be refined and improved design procedures will be developed.

这是一个事后调查项目， 从洛马普列塔地震（10月）中吸取的工程经验教训 1989年）。 洛马普列塔地震引发了大量的 对地面和高架坦克的损害，甚至对 一些改装过的坦克 特别是，网站 长周期地震动分量出现放大 是大幅度晃动的原因， 损坏建在海湾泥浆上的坦克。 在这个项目中，数据 收集的数据将被分析，以评估坦克的性能 结构. 任务包括：（1）收集数据， 记录地下水造成的损害 和石油储存罐以及高架水储存 坦克，（2）计算的动态响应， 代表性储罐和计算响应的相关性 观察到损坏或没有损坏，（3）研究 长周期分量的场地放大效应 晃动现象和对摇摆运动的坦克的基础上， 湾泥，（4）研究改装坦克的损害， 推断出执行不力的原因， 加固机理;（5）地震作用对比 现有规范和标准规定的力 例如API 650、AWWA 100和UBC。 通过将预测的反应与实际行为进行比较 在地震荷载作用下， 对储罐的响应计算进行细化和完善 将制定设计程序。