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GEOREF RECORD

Rocking and overturning of precariously balanced rocks by earthquakes

Baoping Shi, Abdolrasool Anooshehpoor, Yuehua Zeng and James N. Brune
Rocking and overturning of precariously balanced rocks by earthquakes
Bulletin of the Seismological Society of America (October 1996) 86 (5): 1364-1371

Abstract

Precariously balanced rocks in seismically active regions may be used to provide constraints on probabilistic estimates of strong ground motion. A computer program is developed to study the rocking response of models of precariously balanced rocks when subjected to various levels of ground accelerations. The computer code, validated by comparing the numerical and experimental results for simple-shaped rigid blocks, is used to study the rocking response of rectangular blocks with various aspect ratios to the El Centro strong ground motion recording of the 18 May 1940 Imperial Valley earthquake. Results show that during earthquakes, the horizontal components of ground motion play a dominant role in overturning rocking objects. The rederived and corrected Housner's equation (1963) could be used to estimate the minimum overturning acceleration of precarious rocks at different frequencies by measuring the quasi-static toppling acceleration in the field.


ISSN: 0037-1106
EISSN: 1943-3573
Coden: BSSAAP
Serial Title: Bulletin of the Seismological Society of America
Serial Volume: 86
Serial Issue: 5
Title: Rocking and overturning of precariously balanced rocks by earthquakes
Affiliation: University of Nevada-Reno, Mackay School of Mines, Seismological Laboratory, Reno, NV, United States
Pages: 1364-1371
Published: 199610
Text Language: English
Publisher: Seismological Society of America, Berkeley, CA, United States
References: 18
Accession Number: 1997-008908
Categories: Seismology
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus.
N32°30'00" - N42°00'00", W124°30'00" - W114°15'00"
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute.
Update Code: 199703
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