Risk-targeted maps for Romania

被引:0
|
作者
Radu Vacareanu
Florin Pavel
Ionut Craciun
Veronica Coliba
Cristian Arion
Alexandru Aldea
Cristian Neagu
机构
[1] Technical University of Civil Engineering Bucharest,Seismic Risk Assessment Research Center
来源
Journal of Seismology | 2018年 / 22卷
关键词
Seismic hazard; Fragility curves; Probability of collapse; Share; Uncertainty;
D O I
暂无
中图分类号
学科分类号
摘要
Romania has one of the highest seismic hazard levels in Europe. The seismic hazard is due to a combination of local crustal seismic sources, situated mainly in the western part of the country and the Vrancea intermediate-depth seismic source, which can be found at the bend of the Carpathian Mountains. Recent seismic hazard studies have shown that there are consistent differences between the slopes of the seismic hazard curves for sites situated in the fore-arc and back-arc of the Carpathian Mountains. Consequently, in this study we extend this finding to the evaluation of the probability of collapse of buildings and finally to the development of uniform risk-targeted maps. The main advantage of uniform risk approach is that the target probability of collapse will be uniform throughout the country. Finally, the results obtained are discussed in the light of a recent study with the same focus performed at European level using the hazard data from SHARE project. The analyses performed in this study have pointed out to a dominant influence of the quantile of peak ground acceleration used for anchoring the fragility function. This parameter basically alters the shape of the risk-targeted maps shifting the areas which have higher collapse probabilities from eastern Romania to western Romania, as its exceedance probability increases. Consequently, a uniform procedure for deriving risk-targeted maps appears as more than necessary.
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页码:407 / 417
页数:10
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