Structural behaviour of normal strength and ultra high strength reinforced concrete with and without fibres under biaxial loading

摘要

Reinforced normal strength concrete (NSC) panels with and without fibres and ultra high performance concrete (UHPC) panels have been investigated experimentally under biaxial compression-tension loading. At this the effects of lateral tensile stress and cracking on the compression strength were investigated. Based on the experimental results, a proposal for the reduction of the compression strength of the cracked reinforced non-fibred and steel fibre concrete versus the applied tensile strain was developed. In addition, the stress-strain-relationship valid for uniaxial loading has been modified for biaxial compressive-tensile loading. Detailed reports about these tests are given by Fehling et. al. (2007a) and (2007b).