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Concrete; stirrup; confinement; corrosion; compressive strength.

Stirrups of reinforced concrete members are very prone to corrosion compared with longitudinal reinforcements, resulting from their small concrete covers, which lead to concrete cracking and spalling. Due to the adverse effects of corrosion, this article aims to investigate the amount of reduction in the capacity ofreinforced concrete specimens in different corrosion degrees. For this purpose, an experimental investigation is carried out on 22 reinforced and non-reinforced rectangular prism specimens, of which 12 reinforced specimens are corroded. The test variables contain the corrosion percentage, and the stirrup diameter and spacing. Eventually, all specimens are tested for compressive strength for 90 days. The experimental results show that the reduction of compressive strength depends on the corrosion percentage and stirrup diameter. According to thisconclusion, a new formulation is proposed to express the relationship between compressive strength reduction and its effects.

ALI GOHARROKHI¹ JAMAL AHMADI¹ MOHSEN ALI SHAYANFAR² MOHAMMAD GHANOONI-BAGHA³ KIARASH NASSERASADI¹

1. Department of Civil Engineering, Faculty of Engineering, University of Zanjan, Zanjan, Iran
2. School of Civil Engineering, Iran University of Science and Technology, Tehran, Iran
3. Department of Civil Engineering, East Tehran Branch, Islamic Azad University, Tehran, Iran

Published

February 2020

Manuscript received

24 May 2019

Manuscript revised

28 October 2019

Accepted

15 December 2019

Final version published online

13 February 2020