2023 Volume 21 Issue 5 Pages 421-435
In this paper, the applicability of two deformation indices related to displacement of concrete members proposed by the authors has been verified for full-scale RC members with shear or bending failure under bilateral loads. These two indices, namely "thickness increment of RC member" assuming out-of-plane shear failure, and a newly proposed index, "relative displacement on compressive edge in RC member", which assumes in-plane shear failure and out-of-plane bending failure, are mainly discussed in this paper.
As a result, it was revealed that the deformation indices could estimate the failure mode of RC columns with shear failure or bending failure under horizontal bilateral loads. In addition, it was confirmed that one of the indices reached the limit value at about 90% or more of the maximum load, and that the element size dependence was small. It was also found that this index can reasonably evaluate the load carrying capacity as much as or better than the existing strain indices.