INVESTIGATION AND ELASTO-PLASTIC ANALYSIS OF AN RC BUILDING IN WHICH MAJOR SLIPPAGE OCCURRED ON THE 1ST FLOOR-SLAB DURING THE 1995 HYOGO-KEN NANBU EARTH-QUAKE

SUMMARY A concrete building with five stories and a basement collapsed due to the Hyogo-ken Nanbu Earthquake on January 1995 in Japan. The collapse was caused by displacement between the structure of the first story and the basement, accompanied by torsion due to the eccentricity of the walls. On the basis of these facts, an elasto-plastic analysis was performed on a model of the frame which took account of slippage of the first floor. It was found that the shear resistance was reduced remarkably by the slippage