Analysis of Increased Shears and Overturning Moments in Structures by Ground Rocking During Loma Prieta, October 17,1989 Earthquake

1989 年 10 月 17 日洛马普列塔地震期间地面摇动对结构增加的剪切力和倾覆力矩的分析

• 批准号: 9003600
• 负责人: Mihailo Trifunac
• 金额: $ 8.7万
• 依托单位: University of Southern California
• 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: 1990-03-15 至 1992-02-29
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9003600&HistoricalAwards=false
• 关键词: Analysis; Increased; Shears; Overturning; Moments

This is a post Loma Prieta earthquake (Oct. 1989) investigation project in learning from this damaging event. The gist of this project is to study the effect of rocking motion of the earthquake to the structural response. The rocking component of ground motion is generally considered to be small in magnitude and therefore its effects are neglected. There are however certain situations where the combined conditions of structures, site location, and earthquake motions are such that the rocking component becomes important. In this project, the damage distribution will be studied to determine where the rocking motion contributed to the damages of the buildings which were not designed to account for these additional effects. Geology and soil data of the entire bay area will be used to estimate the rocking motion contributions at various sites based on the recorded translation motions. The generated data will then be used to analyze different structures for rocking response. This study will enable engineers to determine rationally the importance of rocking motion in the seismic safety of structures designed with or without consideration of such additional earthquake forces.

这是洛马·普埃塔（Loma Prieta）地震（1989年10月）的调查项目，从这一有害事件中学习。 该项目的要旨是研究地震对结构反应的摇摆运动的影响。 通常认为地面运动的摇摆成分在大小上很小，因此其效果被忽略了。 但是，在某些情况下，结构，位置位置和地震运动的组合条件使得摇摆成分变得重要。 在该项目中，将研究损伤分布，以确定摇摆运动在哪里造成了建筑物的损害，而这些建筑物的损害并非旨在考虑这些其他效果。 整个海湾地区的地质和土壤数据将根据记录的翻译动作来估计各个地点的摇摆运动贡献。 然后，生成的数据将用于分析不同结构的摇摆响应。 这项研究将使工程师能够合理地确定摇摆运动在具有或不考虑此类额外地震力的结构的地震安全性中的重要性。