Stiffness Characteristics Modelling of RC Frame Structures According to Eurocode 8

Abstract

Eurocodes are contemporary design codes based on the state of the art last decade engineering knowledge and experience. However, some provisions and requirements contained in Eurocode 8 are not sufficiently explained or appropriately defined for practical application. To mention the few of them are: the effective stiffness of structural elements, RC frame masonry infill and soil structure interaction that may have considerable influence in changing the structural response. In order to investigate the influence of different parameters to earthquake structural response, a comparative modal, spectral and nonlinear static push-over analysis of a 5 story 3 bay RC plane frame was analyzed for 6 parameter variations. The presented analysis results show major influence of these parameters in changing the structural vibration period which is reflected consequently in changes of: design seismic force, determined displacements and calculated ductility of the structure under consideration.