Mapping of Inelastic Effects and Structural Behaviour Factors for Eurocode 8: A Case Study for Iceland

Abstract eng:
The objective of this paper is to present a uniform probabilistic hazard representation of inelastic spectral ordinates and structural behaviour factors. The study area selected is the South Iceland Lowland. The analysis is performed within the framework of Eurocode 8. The data set applied are obtained from the ISESD data bank. It contains significant Icelandic earthquakes but is augmented by data from continental Europe and the Middle East. In all cases the selected earthquakes are identified as shallow strike-slip earthquakes. The site conditions dealt with are quantified as rock according to the Eurocode 8 definition. The probabilistic hazard study is carried out using a synthetic earthquake catalogue based on available instrumental and historic earthquake data for the study region. The time span of the historic catalogue is roughly 1,000 years, the instrumental catalogue covers 100 years and the strong-motion database covers about 25 years. The numerical results are presented in terms of inelastic uniform hazard spectra and corresponding structural behaviour factor for the study area. These results can be used as an addition to the zoning maps for Iceland presented at the 13WCEE.

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