EVALUATION OF SHEAR STRENGTH OF HIGH STRENGTH CONCRETE CORBELS USING STRUT AND TIE MODEL (STM)

The Strut and Tie Model (STM) has been used as an emerging analysis tool for the design of disturbed regions and non- flexural members in concrete structures, where ordinary flexural theory cannot be adopted. Double-corbels are typical non-flexural members and the shear arm length to depth ratio at the critical section is often less than 1. STM has been mostly used for the design of normal strength concrete double-corbel. In this research nine double- corbels of high strength concrete have been analyzed on the basis of STM, for assumed external loads and geometry. These corbels were later tested in the laboratory to compare the theoretical and actual failure loads. The experimental values have been observed to be quite close to the theoretical values of shear strength of the corbels on the basis of STM. The research therefore attempts to verify STM as an alterative design method for the high strength concrete double-corbels.