Seismic Capacity Testing and Analytical Modeling of Full-Scale Structural Members for Elementary School and Street-Front mix-used Retailing-Residential Buildings(Part II)

Seismic Capacity Testing and Analytical Modeling of Full-Scale Structural Members for Elementary School and Street-Front mix-used Retailing-Residential Buildings(Part II)

Reinforced concrete(RC) columns which failed due to shear were commonly observed during Chi-Chi earthquake. Especially, the shear failure of RC short columns was one of the major failure modes that caused collapsed buildings. Therefore, this study focuses on the mechanism of shear failure during collapse. Also, the said behavior was compared with the results of shaking table tests of half-scaled specimens to explore the differences between static and dynamic tests. Eight specimens were constructed and tested to study the seismic behavior of short columns. These specimens with different height-to-depth ratios, shear reinforcement detailing, and axial load ratios were subjected to double curvature bending with constant axial forces to understand the behavior of shear and axial failure. Test results showed that the different shear reinforcement detailing resulted to different failure modes and the axial failure took place much early with high axial load ratio. Finally, this study recognizes that the RC short column may possess the gravity-load-carrying capacity even if its lateral-load strength has been lost completely.