Seismic performance of a double core RC structure

Abstract

The paper presents the conception and the seismic performance analysis of the double core RC structure for the new Transylvanian Business Centre in Sibiu, Romania. The height regime of the building is ground floor plus fifteen stories (the building is 50 m height), with two more underground levels. The earthquake resistant structure consists in two reinforced concrete cores, regular developed on the entire height of the building, and shear walls placed at the ground, first and second floors, more wide in the horizontal plane. The bearing structure is ensured by a flat slab structure. Seismic performance is assessed on the ground of European provisions for medium ductility members. The following parameters are considered: structural material properties, reinforcing systems and reinforcing ratios, confinement of concrete, insurance of the plastic potential zones, control of the axial force intensity, shear and twisting resistance and rigidity, story drifts limitation, redistribution of the internal forces and ductility in the plastic potential zones. The response spectra analysis procedure was used to approximate the dynamic response of the structural model. Modal results were combined through the Complete Quadratic Combination. Specific non-linear analyses were made through a numerical approach.