Experimental Investigation on Bending Performance of Steel-Concrete Composite Slim Beams

In this paper, the mechanical behavior of steel-concrete composite slim beams was investigated by experiments, and the influence of sectional dimension of steel beams on the bending stiffness and flexural capacity of composite slim beams was evaluated. Test results show that good cooperative performance can be achieved in steel-concrete composite slim beams and the relative slip between steel and concrete is very small. The steel-concrete slim beam presents considerable deformation ability beyond the service stage, which indicates that the composite slim beam has good ductility. In addition, sectional dimension of steel beams is proved to have significant influence on both the bending stiffness and flexural capacity of composite slim beams.

Loading Capacity of Simply Supported Steel-Concrete Composite Slim Beams

A steel-concrete composite slim beam, with its steel section encased in a concrete slab, provides a composite steel-concrete floor construction with minimum depth and high fire resistance. It has become popular in multi-storey steel buildings throughout Europe in recent years and also been used in some projects in China. For the structural engineer, it is critical to understand the behavior of composite slim beam in the sagging moment region. In this paper, the bending capacity and flexural stiffness of the composite slim beams in sagging moment region are investigated theoretically. Meanwhile, the stiffness and bending capacity are given by Finite Element Analysis (FEA). The experiment of a simply supported beam has been carried out in order to validate the theoretical results.