NONLINEAR DYNAMIC ANALYSIS FOR „OD” REPETITIVE BLOCK OF FLATS DESIGN PROJECTS

Abstract

The block of flats stock erected between 1963 and 1976 consist of a large palette of functional schemes and constructive solutions mainly resulted from the architectural and urbanity conditions. In that period a great accent were put onto “repetitive design projects” which mean almost 90% of the existing apartment stock. From all these collective buildings more than 60% are represented by cast-in-place RC structural walls structural system, then 28% are represented by large pre-cast RC panels structural systems and about 9% for the RC frame structural system. The foremost parameters of the applied constructive systems in the period of P13 aseismic design code are: layout spans and RC structural elements cross section; total weight of the building; base shear force; RC structural walls shear area; compressive centric axial forces in case of RC frame structural systems; minimum percent for the reinforce area; fundamental periods of vibration and mass participation factors.