Spectral Simulation and Earthquake Site Properties

by Shih-Chi Liu,
Dilip P. Jhaveri,

Serial Information: Journal of the Engineering Mechanics Division, 1969, Vol. 95, Issue 5, Pg. 1145-1168

Document Type: Journal Paper

Abstract: Presented are analytic results of study on site properties and their use in ground-motion prediction and simulation. Spectral simulations of random-type ground motions based on modal contributions are formulated. Linear filters representing ground transfer characteristics of seismic stations are investigated. Single-mode and two-mode stochastic models are developed to permit prediction of random-type ground motions and the induced response statistics of structures. From the viewpoint of stochastic simulation, the autocorrelation function or the power spectral density function derived from the recorded accelerogram can be used to characterize the specific ground motion. By matching the power spectral density function of an existing ground-motion record to that of the appropriate output of a linear single- (or multi-) degree-of-freedom system subject to white noise, the predominant modal ground frequencies and dampings can be determined.

Subject Headings: Ground motion | Power spectral density | Linear functions | Stochastic processes | Site investigation | Filters | Seismic tests | Seismic effects |

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