Experimental and numerical analysis of flexural composite beams with partial use of high strength/high performance concrete

Abstract

The paper summarises the experimental and numerical analysis of flexural capacity and deformability of structural concrete beams prepared as composite members consisting of two concrete layers made of reinforced normal concrete and high-performance concrete (HPC). The reinforced concrete composite beams used in the tests were prepared in full scale with the cross-section of 120 x 200 mm and the effective span of 2950 mm. The basic samples were composed in two layers consisting of highperformance concrete as the top layer, and normal strength concrete. The results of the analyses confirm a significant improvement of structural properties of composite beams in comparison to the beams prepared totally of normal concrete, and in some cases also in comparison with the beam totally made of HPC.

Improving the Structural Behaviour Rc Precast Concrete Beams Made of Recycled Aggregate Concrete

“…On the basis of results of own experimental studies on model beams (Lapko et al 2005;Lapko, Grygo 2010, 2011Grygo et al 2011) some significant differences in the behavior of flexural structural elements made of recycled aggregate concrete (RAC) were confirmed, compared to members made of concrete with natural aggregate. The beams made of RAC cracked earlier and showed greater deflections under comparable loads.…”

Flexural Behaviour of Concrete‐filled Steel Hollow Sections Beams

“…Concrete-filled steel tubular columns showed a large enhancement of loadcarrying capacity as compared to hollow steel tubular columns which also sustain large strains and deformations. Lapko et al (2005) conducted experiments on reinforced concrete composite beam; the tests were prepared in full scale with the cross-section of 120×200 mm and the effective span of 2950 mm. The basic samples were composed in two layers consisting of high-performance concrete as the top layer and normal strength concrete.…”

Influence of SFRC Layer on Deflections and Cracks of Composite RC Slab

“…For the considered slab series, the quantitative effect of strengthening through the SFRC layer on the bending capacity of the slabs was evaluated as the experimental coefficient m [19]:…”