SEISMIC RISK SCENARIOS FOR MéRIDA, VENEZUELA
This paper presents a seismic risk assessment on the buildings of Méida, Venezuela. It consists of a global hazard and vulnerability evaluation. The tectonic frameworks as well as the seismogenic zones are taken from other investigations. Zonified Probabilistic Seismic Hazard Analyses from other studies are used in the hazard model, selecting the performance based seismic design extreme events, i.e. frequent (Ms = 5.35; PGA = 0.15;I (EMS) = VI-VII), and very rare (Ms = 7.65; PGA = 0.45; I (EMS) = X) scenario events. The ground motion parameters are estimated by means of a specially attenuation law for western Venezuela. PGAs are used for a number of representative site response analyses. The obtained maximum amplification periods and the corresponding amplification factors are used to carry out a microzonation of the Méida plateau. Possible induced effects such as liquefaction and landsliding are estimated by the HAZUS?Earthquake Loss Estimation Methodology. The vulnerability of the buildings is assessed through a Building Typology Matrix based method (RISK-UE LM1), where in the case of Méida a specific Typology Matrix is obtained. This approach provides Damage Probability Matrices for each of the scenario events and typologies, where expected damage distribution may be estimated. The seismic vulnerability of the city is high. For the frequent event the mean damage grades are Grade 0 and Grade 1, on the other hand, for the very rare event mean damage grades are Grade 3 and Grade 4. GIS ArcViewR software is used to display damage and risk scenarios.
Seismic risk scenarios vulnerability assessment hazard assessment damage probability matrices.
A. Castillo L. G. Pujades i Beneit F. Almansa
Dept. of Construction Technology , University of The Andes, Mérida, Venezuela Department of Geotechnical Engineering and Geosciences, Technical University of Catalonia,Barcelona, Dept. of Structures in Architecture, Technical University of Catalonia, Barcelona, Spain
国际会议
14th World Conference on Earthquake Engineering(第十四届国际地震工程会议)
北京
英文
2008-10-12（万方平台首次上网日期，不代表论文的发表时间）