Khảo sát thực nghiệm ảnh hưởng của cường độ chịu nén bê tông đến ứng xử uốn của dầm liên hợp thép - bê tông

Abstract

Experimental investigation of effect of concrete compressive strength on bending behevior of steel - concrete composite beams was carried out on two beam specimens with concrete grade of C40 and C60. Perfobond shear connectors were used for beams in order to resist the relative slip and create composite behavior between concrete slab and steel girder with T inverse section. The investigated paramesters included load capacity, deflection, relative slip between concrete slab and steel girder, failure mode of beams. The results showed that concrete compressive strength effected significantly on the deflection, the relative slip between concrete slab and steel girder. The load capacity of composite beam with concrete grade of C60 did not increase significantly in comparison with that of beam with concrete grade of C40, and the failure mode was nearly the same.