A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Seismic hazard and uncertainty analysis of Honduras
Abstract Honduras is situated on the western part of the Caribbean tectonic plate. There are no known major faults within the country, however seismic activity along the plate boundaries have significant effect along its border regions. The severity of ground shaking in Honduras has not been previously assessed for use in earthquake design codes, regional planning and disaster mitigation. The objectives of this paper are (1) to evaluate the seismic hazard in Honduras for structural analysis and design purposes; and (2) to obtain estimates on the effects of uncertainties in the various parameters of the hazard forecast model. The seismic hazard in Honduras is presented in terms of an iso-acceleration map. Such a map is developed for a return period of peak ground acceleration of 500 years. The highest hazard is observed in the southwestern and western regions of the country which are closest to the junction of the Benioff Zone, the Caribbean Plate Boundary and the Shallow Focus Volcanic province. In that region peak ground accelerations reach values of 0.5 g with a return period of 500 years. The lowest seismicity is found in the eastern and northeastern parts of the country where peak ground accelerations are as low as 0.1 g for a return period of 500 years. In addition to the seismic hazard maps, probabilities of exceedance of peak ground acceleration are computed for 11 cities in Honduras. These provide the basis for site-specific hazard analysis at each location. Sensitivity analysis of various model parameters show that forecasted peak ground accelerations are affected the most by the uncertainty in the attenuation relationship. Peak ground acceleration values are least sensitive to various fault rupture relationships when the site is far from the seismic source. However, an increase in the difference of predicted hazard is observed when sites are in close proximity of a fault or a seismic source. The overall results are considered to be conservative since for most model parameters the more conservative values are used.
Seismic hazard and uncertainty analysis of Honduras
Abstract Honduras is situated on the western part of the Caribbean tectonic plate. There are no known major faults within the country, however seismic activity along the plate boundaries have significant effect along its border regions. The severity of ground shaking in Honduras has not been previously assessed for use in earthquake design codes, regional planning and disaster mitigation. The objectives of this paper are (1) to evaluate the seismic hazard in Honduras for structural analysis and design purposes; and (2) to obtain estimates on the effects of uncertainties in the various parameters of the hazard forecast model. The seismic hazard in Honduras is presented in terms of an iso-acceleration map. Such a map is developed for a return period of peak ground acceleration of 500 years. The highest hazard is observed in the southwestern and western regions of the country which are closest to the junction of the Benioff Zone, the Caribbean Plate Boundary and the Shallow Focus Volcanic province. In that region peak ground accelerations reach values of 0.5 g with a return period of 500 years. The lowest seismicity is found in the eastern and northeastern parts of the country where peak ground accelerations are as low as 0.1 g for a return period of 500 years. In addition to the seismic hazard maps, probabilities of exceedance of peak ground acceleration are computed for 11 cities in Honduras. These provide the basis for site-specific hazard analysis at each location. Sensitivity analysis of various model parameters show that forecasted peak ground accelerations are affected the most by the uncertainty in the attenuation relationship. Peak ground acceleration values are least sensitive to various fault rupture relationships when the site is far from the seismic source. However, an increase in the difference of predicted hazard is observed when sites are in close proximity of a fault or a seismic source. The overall results are considered to be conservative since for most model parameters the more conservative values are used.
Seismic hazard and uncertainty analysis of Honduras
Kiremidjian, Anne S. (author) / Shah, Haresh C. (author) / Sutch, Patricia L. (author)
1982-01-01
12 pages
Article (Journal)
Electronic Resource
English
Uncertainty about the uncertainty in seismic hazard analysis
| Online Contents | 2004
Uncertainty about the uncertainty in seismic hazard analysis
| British Library Online Contents | 2003
Uncertainty Analysis on Seismic Hazard Evaluation
| British Library Conference Proceedings | 1995
Uncertainty analysis in seismic hazard evaluations
| British Library Conference Proceedings | 1993
Uncertainty about the uncertainty in seismic hazard analysis
| Elsevier | 2003