Published in Scientific Papers. Series "Journal of Young Scientist", Vol. 2
Written by Marius GRUIA
Romanian earthquakes since 1940 and 1977 have produced severe damages to a significant number of RC framed buildings whose plans were characterized predominantly by irregularities like flexible diaphragms, structural discontinuities or L or H shapes, among others. These conceptual characteristics contributed in a decisive way to the damage or collapse of buildings designed and built according to old seismic codes.On the other hand, European and internationalexperience of the past strong earthquakes during last decades shows that, in many urban areas besides many old building, there is a number of modern RC buildings that do not meet the requirements of additionally improved Codes for seismic resistant design. The paper presentssome types of structural interventions on buildings and solutions for determine the dynamic building response. On basis of dynamic response recorded for buildings, a methodology for analyzing the structural behavior of this typology of buildings by adequatesoftware for 3D seismic analyzing is presented. For this purpose non-destructive and geodynamic methods were used. The non-destructive methods are based on auscultation, ultrasound and percussion with Schmidt hammer, and the geodynamic methods are based on the GEODAS equipment with Microwave software.The results proved that the mass and stiffness is not always beneficial and also emphasizes the role of geometry on dynamic response of building.
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