Shear strength model for reinforced concrete rectangular hollow columns

• Published in: Engineering structures 2013-11, Vol.56, p.958-969
• Main Authors: Shin, Myoungsu, Choi, Yoon Young, Sun, Chang-Ho, Kim, Ick-Hyun
• Format: Article
• Language: English
• Subjects: Applied sciences; Assessments; Bridge elements; Bridges; Building structure; Buildings. Public works; Column aspect ratio; Construction (buildings and works); Ductility; Exact sciences and technology; Hollow column; Lateral loading; Lateral loads; Mathematical models; Reinforced concrete; Reinforced concrete structure; Reinforcement; Reinforcing steels; Shear strength; Strength of materials (elasticity, plasticity, buckling, etc.); Structural analysis. Stresses
• ISSN: 0141-0296; 1873-7323
• DOI: 10.1016/j.engstruct.2013.06.015

•Concrete shear strength decreased in a linear proportion to column aspect ratio.•Specimens with no web longitudinal bars showed lower concrete shear strengths.•Concrete shear strength was associated more with gross section area than web area.•Cyclic loading caused about 80% of concrete shear strength under monotonic loading.•Negative effect of displacement ductility on column shear strength is quantified. The primary purpose of this paper is to propose an assessment model for concrete contribution to the shear strength of reinforced concrete (RC) rectangular hollow columns subjected to lateral loading. The model was developed based on the test results of this study, as well as other hollow column tests available in literature. A total of thirteen ¼-scale RC rectangular hollow columns, with no transverse reinforcement, were tested under lateral loading in this study. The test variables included column length-to-depth aspect ratio, longitudinal steel ratio, hollow section ratio, web-to-gross section area ratio, and loading pattern. Also, a database of almost all RC hollow column tests available worldwide was assembled and used in quantifying the effect of increasing ductility on the column shear strength. Several popular shear models proposed earlier, all of which were mainly based on tests for columns with solid sections, were reviewed and compared with the developed model.