Shake Table Tests on Reinforced Concrete Short Columns Failing in Shear

Abstract eng:
RC short columns are prone to pure shear failure due to insufficient transverse reinforcement, but there has been very limited research found in the literature on pure shear failure of short columns. As such, this study conducted shaking table tests on 4 specimen frames to investigate full-range structural behavior of RC short columns until complete collapse. A 10% low axial load was applied using lead packets, and ground motion record TCU082ew from the 1999 Chi-Chi earthquake was employed to excite the specimen frames. Through comparison with its companion full-scale cyclic test results, this study finds that shear strengths of short columns from dynamic tests are higher than those from cyclic tests. The existing predictive models are inclined to underestimate shear strengths of short columns, which is especially true for columns with nonductile detailing. In addition, the backbone model of ASCE/SEI 41-06 update for short columns also proves conservative.

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