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1989年10月洛马普列塔地震后的一次地震。 从这一破坏性事件中吸取教训的调查项目。 本计画的主旨是研究摇摆效应 地震运动对结构响应的影响。 地面运动的摇摆分量一般是 被认为是小规模的，因此， 影响被忽略。 然而，有一定的 结构的组合条件， 场地位置和地震运动使得 摇摆部件变得重要。 本工程 将研究损伤分布，以确定 摇摆运动造成了建筑物的损坏 这并不是为了解释这些额外的 方面的影响. 将使用整个海湾地区的地质和土壤数据 为了估计在各种不同情况下的摇摆运动贡献， 基于记录的平移运动的位置。 的 生成的数据将用于分析不同的 摇摆响应的结构。 这项研究将使工程师能够合理地确定 摇摆运动在地震安全中的重要性 设计时考虑或不考虑这些因素 额外的地震力。