An IBC approach for seismic microzoning at Cap-Haitien (Haiti)

Didier Bertil (1) , Agathe Roulle (1) , Gildas Noury (1) , Claude Prépetit (2) , Ronaldine Gilles (3) , Rochenel Sylvain (4) , Julio Jean-Philippe (5)

1 BRGM - Bureau de Recherches Géologiques et Minières (BRGM)
2 BME, Bureau des Mines et de l'Energie, Port-au-Prince, Haïti
3 LNBTP - Laboratoire National du Bâtiment et des Travaux Publics
4 LNBTP - Laboratoire National du Batiment et des Travaux Publics
5 LNBTP - Laboratoire National du Batiment et des Travaux Publics

A seismic microzoning was performed for Cap Haitien city in Haiti. This city is as much exposed to seismic hazard as Port-au-Prince struck by the January 2010 earthquake. Many complementary investigations in geology, geophysics and geotechnics were needed to define areas of homogeneous soil response. The cross-analysis of this information allowed us to distinguish five soil classes with lithological site effects. The soil columns responses were simulated through a 1D non-linear analysis using CyberQuake software. Design response spectra were produced with the shape defined for ASCE 7-05/IBC(2009) code and specific amplification factors Fa and Fv. The seismic microzoning highlight that the majority of the urban area is located on soft soil or very soft soil with strong lithological site effects over large areas.

Keywords: earthquake; microzoning; site effects; Haïti

Domains: Geophysics [physics.geo-ph]; Geophysics [physics.geo-ph]; Global Changes

Didier Bertil, Agathe Roulle, Gildas Noury, Claude Prépetit, Ronaldine Gilles, et al.. An IBC approach for seismic microzoning at Cap-Haitien (Haiti). 2nd European conference on earthquake engineering and seismology : 2ECEES 2014 Joint event of the 15th European Conference on Earthquake engineering & 34th General Assembly of the European Seismological Commission, Aug 2014, Istanbul, France. ⟨hal-01016499⟩