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Engineering Research Equipment Grant: Instruments for Observation of Microtremors in the Los Angeles Basin

工程研究设备补助金：洛杉矶盆地微震观测仪器

基本信息

批准号：
8705091
负责人：
Marijan Dravinski
金额：
$ 4.2万
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：
1987
资助国家：
美国
起止时间：
1987-07-01 至 1988-06-30
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=8705091&HistoricalAwards=false
关键词：
Engineering Research Equipment Grant Instruments

项目摘要

The development of reliable design procedures for the design of earthquake resistant structures requires an understanding of the manner in which the surrounding earth material at the site of a structure responds to seismic loading. However, due to the infrequent nature of earthquakes, and to the variability in the geology and physical properties of the soil at different locations, it is virtually impossible to provide such records for every proposed site. This action is to provide equipment to measure the long period microtremors in the entire Los Angeles basin. Microtremors, or microseisms, are small tremors or vibrations of the earth that are generated by natural occurrences such as the pounding of surf on the shore, or road traffic. They are not associated with earthquakes, but may be used, as is proposed here, to understand better the process of ground shaking due to earthquakes. The measured microtremors in the Los Angeles basin will be compared with existing strong ground motion measurements in the basin. Previous studies of microtremor data in Japan strongly suggests that microtremor data can be used to understand the strong motion response at a particular site to a damaging earthquake. The principal investigators are recognized for their expertise in earthquake engineering studies, and have the institutional resources to use effectively the equipment to be purchased.

设计可靠的设计程序，抗震结构需要了解的方式，在建筑物周围的泥土响应地震荷载。然而，由于不经常的性质，地震，以及地质和物理的变化不同地点的土壤性质，实际上不可能为每一个拟议的网站提供这样的记录。这一行动是为了提供设备，以衡量长期整个洛杉矶盆地都有轻微的震动微震动，或微震，是地球的小震动或振动，由自然现象产生，如海浪冲击海岸或公路交通。它们与地震无关，可以用来，正如这里提出的，更好地理解的过程，地震引起的地面震动。在洛杉矶盆地测得的微震将与盆地内现有的强地面运动测量。先前日本的微动数据研究强烈表明，微动数据可以用来理解在一个一个破坏性地震的特定地点。主要研究者因其在以下方面的专业知识而受到认可：地震工程研究，并有机构有效利用所购设备的资源。