Analytical Study on Seismic Response of Reinforced Concrete Buildings Considering P-Δ Effect

Abstract

When the building responses by earthquakes, the additional overturning moment the gravity load of the building produces as horizontal displacement increases. This influence called P-Δ effect is generally remarkable when the base shear coefficient is small. The purpose of this paper is to investigate the P-Δ effect on the horizontal deformation of ordinary high-rise buildings by earthquake response analysis using three types of input seismic motions (sweep wave, earthquakes specified in the notification and recorded seismic waves), and to derive response evaluation formula considering the P-Δ effect. The induced evaluation formula induced theoretically showed excellent compatibility with analytical response results.