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Shear critical R/C columns under increasing axial load

Zimos, D.K., Papanikolaou, V.K., Kappos, A. J. ORCID: 0000-0002-5566-5021 and Mergos, P.E. ORCID: 0000-0003-3817-9520 (2020). Shear critical R/C columns under increasing axial load. ACI Structural Journal,

Abstract

Structural elements in old reinforced concrete (R/C) frame buildings are often prone to shear or flexure-shear failure, which can eventually lead to loss of axial load capacity of vertical elements and initiate vertical progressive collapse of a building. An experimental investigation of shear and flexure-shear critical R/C elements subjected to increasing axial load is reported herein. The focus is on the effect of vertical load redistribution from axially failing columns on the non-linear (pre- and post-peak) response of neighboring shear-dominated members. The test results along with an analysis of the recorded deformation, strength, stiffness and energy dissipation characteristics shed light on the performance of sub-standard columns under constant and increasing axial load subsequent, or just prior, to failing in shear, thus providing useful insights into the assessment of existing R/C structures.

Publication Type: Article
Publisher Keywords: Existing structures; Experimental program; Reinforced concrete columns; Shear failure; Axial failure; Vertical load redistribution; Progressive collapse
Subjects: T Technology > TA Engineering (General). Civil engineering (General)
Departments: School of Mathematics, Computer Science & Engineering > Engineering > Civil Engineering
URI: https://openaccess.city.ac.uk/id/eprint/23798
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