Title: Experimental Study on Scale Effect of Eccentrically Compressed Reinforced Concrete Columns Strengthened with Carbon Fiber-Reinforced Polymer

Author(s): Jianhui Si, Yuan Zhou, Zhaobao Zeng, Kai Li, Jiannan Hu, Zewei Liu, and Xinchao Ding

Publication: Structural Journal

Volume: 121

Issue: 5

Appears on pages(s): 77-87

Keywords: carbon fiber-reinforced polymer (CFRP) strengthened columns; reinforced concrete square column; size effect; small eccentric compression

DOI: 10.14359/51740854

Date: 9/1/2024

Abstract:
Strictly following the similarity principle of specimen size, eccentricity, and carbon fiber-reinforced polymer (CFRP) strengthening layers, three groups of reinforced concrete square columns with different scales were designed. Experimental studies on eccentric compression of unstrengthened columns and CFRP-strengthened columns were carried out. The failure characteristics of specimens of various sizes were obtained, as well as the bearing capacity, ductility coefficient, lateral deflection, CFRP, and steel bar strain were analyzed. The test results showed an improved ductility, stiffness, and bearing capacity of eccentrically compressed reinforced concrete columns, strengthened with CFRP. However, the strengthening effect is inversely proportional to the size of the specimen and has a more obvious size effect.