The Effect of Geological Site Conditions on Earthquake Intensity : Seismic Zonation

地质场地条件对地震烈度的影响：地震分区

• 批准号: 9015903
• 负责人: John Wiggins
• 金额: $ 8.48万
• 依托单位: J H Wiggins Company
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1991
• 资助国家: 美国
• 起止时间: 1991-01-01 至 1992-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9015903&HistoricalAwards=false
• 关键词: Effect; Geological; Site; Conditions; Earthquake

This research addresses the relationship between surface geology, as described in geological maps, with the earthquake strong ground motions recorded at a site. The motivation is to make more precise the general observation that structures built on rock sites experience the least damage and those on soft soil the greatest damage during an earthquake. The aim is to address a scale which falls between "macrozonation" - seismic regionalization - and "microzonation", that is, site specific intensity modification. The Whittier Narrows earthquake of October 1, 1987 and the Loma Prieta earthquake of October 17, 1989 produced the largest suite of strong ground motion records (accelerograms) ever taken in just two events. In addition, many accelerograms have been recorded on a variety of soil and rock conditions during other earthquakes. This study examines this extensive data library to correlate the intensity characteristics of each instrument site with characteristics of surface geology, as described on surface geology maps. This correlation has application in determining priorities for the rehabilitation of structures, in land use planning, and in determining probable maximum loss estimates prepared for insurers, bankers and business.

这项研究解决了表面之间的关系 地质学，如地质图所示， 在一个地点记录到的地震强烈地面运动。 的 动机是使一般观察更加精确， 建在岩石上的建筑 而软土地基上的损伤最大， 地震 其目的是解决一个规模，其中福尔斯下降 在“宏观区划”--地震区划--和 “微地带化”，即对特定地点的密度进行修改。 1987年10月1日惠蒂尔海峡地震， 1989年10月17日洛马普列塔地震 最大的强震记录 （加速度图）只在两个事件中拍摄。 此外，本发明还提供了一种方法， 许多加速度记录在各种土壤上 以及其他地震时的岩石状况 本研究 检查这个广泛的数据库， 每个仪器位置的特性， 地表地质，如地表地质图所示。 这种相关性可用于确定 在土地使用规划中， 确定可能的最大损失估计， 保险公司、银行家和企业。