ULTIMATE FLEXURE STRENGTH AND SHEAR STRENGTH OF DOUBLE-COMPOSITE I-GIRDER UNDER HOGGING BENDING MOMENT

In double-composite continuous girder bridges, the lower concrete flange is installed on the lower steel flange at intermediate supports. In this paper, the ultimate hogging bending moment and shear capacities of the double-composite girders are investigated experimentally. Two double-composite specimens classified into compact sections are used in bending moment experiment to investigate the effect of concrete crushing on the bending moment capacity. One specimen with lower concrete slab is employed for a shear test. The bending moment and shear capacities for double-composite girders are proposed on the basis of these experimental results.