Earthquake Engineering Needs And Seismic
Hazard Assessment
Author(s)
J.-U. Klügel & L. Mualchin
Abstract
We present a detailed discussion on the needs of hazard assessment for different
applications of earthquake engineering and risk assessment. This discussion
includes design and risk assessment issues. We define the requested information
from seismic hazard analysis as an input to a meaningful and economical
engineering analysis. This provides the basis for a detailed review of the main
methods of contemporary seismic hazard analysis: (1) traditional Probabilistic
Seismic Hazard Analysis (PSHA) as used in building codes of many countries,
(2) scenario-based seismic hazard analysis or neo-deterministic seismic hazard
analysis (NDSHA) as the principal alternative, and (3) the state of the art
physics-based deterministic method.
We demonstrate that only the physics- and scenario-based seismic hazard
analysis method that combines (a) contemporary seismic waveform modelling,
(b) an in-depth geological and seismo-tectonic analysis of the region of interest,
and (c) empirical information is able to provide the complete set of input
information for economical earthquake engineering analysis that allows to
combine improved seismic performance of both the structures and components
with reasonable design costs. We show that the scenario-based seismic hazard
method can easily be adapted/extended for risk assessment as required in
assurance applications by developing state of the art probabilistic data models
that are in compliance with observational data assembled in earthquake
catalogues.
The paper includes a practical example of the scenario-based approach for the
development of the design basis of a critical infrastructure and the risk
assessment for a seismically induced production loss of a nuclear power plant
located in Switzerland.
We recommend that DSHA and NDSHA must be used for engineering
design.
Keywords
seismic hazard analysis, seismic design, seismic risk analysis, earthquake engineering
Related Book
Other papers in this volume
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