Temporal and in Earthquake Ground Motion at a Single Point
Publication: Journal of Engineering Mechanics
Volume 128, Issue 5
Abstract
This paper describes a continued study on three-dimensional temporal characteristics of earthquake ground motions at a single point. Based on an instantaneous tangential and normal acceleration decomposition of ground acceleration trajectory, a ground motion can be partitioned into a finite sequence of staggered time intervals of acceleration and deceleration. A formulation is developed to estimate speed and angular changes over a partitioned interval in terms of rates of positive and negative tangential and normal acceleration. Based on these concepts, general ground motion properties, peak ground acceleration, peak ground velocity, and peak ground displacement are examined. Several Northridge earthquake records are studied in detail. It is found that the highest peak of ground acceleration in these records corresponds to a high peak of deceleration, and a velocity maximum often precedes the peak of acceleration.
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Information & Authors
Information
Published In
Journal of Engineering Mechanics
Volume 128 • Issue 5 • May 2002
Pages: 502 - 510
Copyright
Copyright © 2002 American Society of Civil Engineers.
History
Received: Jul 1, 1999
Accepted: Oct 31, 2001
Published online: Apr 15, 2002
Published in print: May 2002
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