Experimental and Analytical Studies on Reinforced Concrete Buildings with Seismically Vulnerable Beam- Column Joints




1 Introduction

1.1 MOTIVATION

Numerous reinforced concrete (RC) buildings designed prior to 1970s still exist in the western United States and in other seismically active regions worldwide. These older RC buildings were usually designed for gravity load only or with little consideration of seismic forces and detailing. Accordingly, insufficient shear reinforcement was provided in columns and beam-column joint regions. To assess the risk of such seismically vulnerable RC buildings, significant experimental and analytical research activities have been conducted to investigate the capacity of shear-critical columns and to predict their axial failure [Lynn 2001; Sezen 2002; Elwood and Moehle 2003; Ghannoum 2007; Shin 2007].


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