PARAMETRIC ANALYSIS OF THE BUILDINGS BEHAVIOUR UNDER EARTHQUAKES IN CONTEXT OF VRANCEA SEISMICITY.

There are three components of the seismic risk assessment: seismic hazard, vulnerability of structures and elements at risk. Seismicity of Vrancea is characterized by a source process and some spectral characteristics of this intermediate-depth source in a narrow epicentral and hypocentral region. Frequency content of the Vrancea ground motions shows significant differences in source mechanisms, a directivity between events, an asymetric distribution of the ground motion, soil condition with long predominant period of ground vibration, Tg=1.4-1.6s, in Bucharest. Objective of the present paper is to present a parametric analysis of the building behaviour under earthquakes in context of Vrancea seismicity. In order to get the building's future performance, a parametric analysis from qualitative and quantitative point of view was made. Qualitative evaluation is based on the inspection and on the examination of the building, being characterized by inductive approach to data gathering, interpretation, and reporting. For structural analysis using the response spectra both software ROBOT and SAP2000 were used. Quantitative evaluation aims mainly at determining the conventional capacity to the seismic loads of the inspected building and determining the structure's stiffness to lateral displacement. [ABSTRACT FROM AUTHOR]