Experimental behavior and analysis of steel-laminated concrete (RC and UHPC) composite girders

This paper experimentally and numerically investigated the flexural behavior of steel-laminated concrete composite girders. The laminated concrete deck consists of a reinforced concrete (RC) layer and an ultra-high-performance concrete (UHPC) layer, and the resulting steel-laminated concrete composite girder is referred to as S-RC-UHPC girder. Experimental tests were first conducted to compare the flexural behavior of three composite girders, i.e., steel-reinforced concrete (S-RC) girder, steel-ultra high performance concrete (S-UHPC) girder, and S-RC-UHPC girder. The test results confirm the validity of using S-RC-UHPC girders. Detailed 3D finite element (FEM) model is then developed and benchmarked. The benchmarked model can be used to further investigate the flexural behavior of S-RC-UHPC girders.