Experimental Study on Shear Capacity of Reinforced Concrete Beams with Corroded Longitudinal Reinforcement.

Sun-Jin Han,Hyo-Eun Joo,Soo-Yeon Seo,Kang Kim,Inwook Heo,Seung-Ho Choi

doi:10.3390/ma12050837

Abstract

In this study, shear tests were conducted to investigate the effects of longitudinal reinforcement corrosion on the shear capacity of reinforced concrete (RC) members with transverse reinforcement. To this end, a total of eight test specimens were fabricated, and the corrosion rates and anchorage details of rebars were set as test variables. In addition, an accelerated corrosion technique was used to introduce corrosion into the longitudinal reinforcement without corroding shear reinforcement. The test results indicated that the capacities of the specimens in which tension reinforcement was not properly anchored at the ends of the members decreased rapidly at high corrosion rates, whereas the capacities of the specimens in which tension reinforcement was properly anchored by hooks were similar to or higher than those of the non-corroded specimens, despite bond loss caused by corrosion.

Highlights

In reinforced concrete (RC) structures, reinforcement corrosion is prevented by the strong alkalinity of the concrete cover surrounding the reinforcement [1,2]
Since this study aimed to investigate the effects of longitudinal reinforcement corrosion on the shear capacity of RC members with transverse
The shear tests were performed after the introduction of corrosion into the longitudinal reinforcement reinforcement

Summary

Introduction

In reinforced concrete (RC) structures, reinforcement corrosion is prevented by the strong alkalinity of the concrete cover surrounding the reinforcement [1,2]. If carbon dioxide in the atmosphere results in the carbonation of the concrete cover, or if chloride attacks destroy the passive films on the steel reinforcement, corrosion of reinforcement begins, and the effective sectional area of reinforcement and the bond performance between the reinforcement and concrete drastically decrease [1,2,3]. In this regard, many studies have been conducted on the correlation between the bond performance of reinforcement changed by corrosion and the flexural performance of RC members [4,5,6,7,8,9,10,11,12,13], and several analysis models have been developed so far. Han et al [5]

Objectives

Results

Discussion

Conclusion