EFFECT OF INNER RING STIFFENER ON THE STRENGTH OF CONNECTION BETWEEN STEEL BEAM AND CONCRETE-FILLED SQUARE TUBE COLUMN

Abstract

Experimental and analytical studies have been carried out to estimate the yield and ultimate strength of steel beam to concrete-filled square tube column reinforced with inner ring stiffener. The strength capacities of the connections can be estimated by the superposition of the capacity of column flange which is calculated with the Yield Line Theory and that of inner ring stiffener. The analytical yield and ultimate strengths agree comparatively well with the experimental yield and ultimate strengths respectively.