Forecast Of Strong Ground Motion Field Near
The Fault For Earthquake Disaster Reduction
In Urban Areas
Author(s)
L. Haiming, T. Xiaxin, S. Xiaodan & L. Ping
Abstract
Earthquake disasters are caused mainly from the damage and collapse of
engineering structures, and the latter is mainly made by strong ground motion
during the event. As city areas and scales of engineering structures are getting
larger and larger in recent years, more than ever before, the forecast of strong
ground motion field is emphasized. From a case study at Lanzhou city of China,
a new developed approach is introduced in this paper. A hybrid source model
that combines Asperity model with a K squire model is adopted. The high
frequency motion is synthesized by random procedure and low frequency motion
is calculated by a simplified numerical Green Function procedure, the two are
combined in time domain after high and low pass filtered separately. Finally, the
application of the result in the disaster reduction of the city is suggested.
Keywords: forecast, ground motion field，hybrid source model, random
synthesis, numerical green function.
1 Introduction
In the development of modern cities, more and more large horizontal dimension
structures, such as long span structures, fly-over crossings and buried pipelines
have been built up in urban areas. Damage of those structures in an earthquake
will cause large losses to the city. Thus, disaster risk assessments and reductions
for cities, especially for those located near or above active faults, are emphasized
in earthquake engineering field. Engineering countermeasures for the risk must
Keywords
forecast, ground motion field，hybrid source model, random
synthesis, numerical green function.
Related Book
Other papers in this volume
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