Bearing strength of concrete for difference heights of concrete blocks

摘要

Bearing strength of concrete is important design criteria to transmit load safely to concrete supports especially in column-foundation, corbel, bridge pedestal, support anchorage, post-tension member and other types of structure supports. Most of existing formula for concrete bearing is mainly related to its compressive strength and steel-to-concrete area ratios. Effect of different heights of concrete supports on concrete bearing is not clearly explained. Therefore, this paper is carried out to investigate the effect of concrete bearing for different heights of concrete blocks under the compression load. The confinement effects of concrete bearing on different height is also determined. Experimental results indicate that the confinement effect and bearing strength of concrete are decreased with increasing of concrete blocks heights due to slenderness effects.