Study on the structural behavior of flush beam for slim concrete floor

Abstract

The structural behavior of the composite flush beam for slim floor as a whole has been investigated. The deformation behavior of the structural members steel beams with trapezoidal cross sections and specially punched webs were developed as composite beams in slim floors. The estimation of the flexural stiffness and bending capacity of composite slim beams is rather complicated, because the influence of many factors should be taken into account. These factors include variable section dimensions, profile of the beam, stiffness of the beam and interaction between steel and concrete. In this paper, analytical investigations have been conducted to investigate the deflection behavior of flush beam specimens under monotonic loading. A design procedure is developed for composite slim floor flush beams based on cross-sectional analysis, and the flexural properties of the slim floor beams are evaluated. From elastic linear analytical investigation, it was found that the deflection of delta beam is 48% less than the conventional I-beam; moreover, the stiffness of the delta beam is 49.8% higher than the I-beam.