Simulation Of Earthquake Ground Motion
For Generation Of Artificial Accelerograms
Author(s)
J. A. Abdalla & Y. M. Hag-Elhassan
Abstract
The determination of strong ground motion acceleration-time history is vital for
the evaluation of the dynamic response of existing structures and also for the
earthquake resistant design of new structures. The determination of such strong
ground motion records is usually obtained by using accelerometers to record the
strong motion parameters in the event of earthquakes. The lack and scarcity of
accelerometers for recording strong ground motion acceleration-time history in
some seismically vulnerable mega-cities necessitates the use of simulation for
artificial generation of these records. This paper simulates ground motion
acceleration-time history using stochastic processes. The ground acceleration is
modelled as a Gaussian stationary process and the non-stationary acceleration-time
history is obtained by applying an envelope or shape function to the
stationary process. The power spectral density used for this process is a function
of the earthquakes’ magnitudes, epicentral distances, and sites soil condition.
The generated acceleration-time history can be used to assess the vulnerability of
existing buildings to earthquakes and also for the earthquake resistant design of
new buildings.
Keywords: artificial accelerogram, simulation of ground motion, stochastic
processes.
1 Introduction
Earthquakes are among the most destructive natural disasters. The life and
economic loss which may result from a severe earthquake striking a densely
populated area, is a direct consequence of damage and collapse of buildings.
There are several densely populated mega-cities that are located in a soft deposit
Keywords
artificial accelerogram, simulation of ground motion, stochastic
processes.
Related Book
Other papers in this volume
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