Effects of site characteristics on near-source recordings of strong ground motion
A comprehensive near-source data base has been used to study the effects of site characteristics on recorded ground motion. Various statistical methods, including regression analyses and hypothesis testing techniques, have been complicated by various biases in these data, most notable being the interrelationship of several of the characteristics. These interrelationships cause many characteristics to be highly correlated making the separation of their effects difficult. However, the adherence to a strict set of data selection criteria and appropriate analysis techniques has minimized these problems and allowed a reasonable separation of the major effects. Site effects associated with several ground motion parameters were studied; these parameters include peak horizontal acceleration, peak vertical acceleration, peak horizontal velocity, and several high- frequency ordinates of horizontal pseudo-relative velocity. We have found that all of the ground motion parameters investigated were significantly influenced by one or more of the following characteristics: the geology and topography of the site, the size and embedment of the structure housing the instrument, and the fault mechanism of the earthquake. While the last characteristic is related to the source rather than the site, it was included because of its significant effect on the other site characteristics. 28 references, 2 figures, 3 tables.
- Research Organization:
- Lawrence Livermore National Lab., CA (USA)
- DOE Contract Number:
- W-7405-ENG-48
- OSTI ID:
- 5543389
- Report Number(s):
- UCRL-86248; CONF-8307105-1; ON: DE84001235
- Resource Relation:
- Conference: Workshop on site-specific effects of soil and rock on ground motion and their implications for earthquake resistant design, Santa Fe, NM, USA, 26 Jul 1983
- Country of Publication:
- United States
- Language:
- English
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