Load Path Effect on the Response of Slender Lightly Reinforced Square RC Columns under Biaxial Bending

This paper presents an experimental investigation of the effect load path on force-displacement response, damage patterns, and failure modes slender lightly reinforced concrete (RC) columns. A review available tests, which include columns subjected to multiaxial loading protocols, is first presented. Next, a new campaign 18 column specimens tested under constant axial lateral displacement-controlled paths described. The results tests performed confirm that response biaxial qualitatively quantitatively different from observed for uniaxial paths. foremost qualitative difference mechanisms change mode can as result. This, in turn, leads quantitative differences ultimate collapse deformation, therefore ductility hysteretic dissipation capacity.