An Experimental Study on Load-Carrying Capacity of Rc Members by Alkali-Silica Reaction

Tatsuki, Shinichi; Tsuyoshi, Takeshi; Ishibashi, Toshiyuki; Matsuda, Yoshinori; Imai, T.

doi:10.2208/jsceje.63.166

Cited by 5 publications

(1 citation statement)

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“…The shear capacity of RC members with cracks introduced by reinforcing bar corrosion or ASR (alkali-silica reaction) may be greater than that of sound members (Okada et al 1988;Toongoenthong and Maekawa 2004;Tatsuki et al 2007). This is mainly due to the development of the tied arch effect caused by the reduction of the bond between concrete and main reinforcement.…”

Section: Experiments Of High Strength Rc Beams Subjected To High Temperature Heatingmentioning

confidence: 99%

Remaining Shear Capacity of Fire-Damaged High Strength RC Beams after Moist Curing

Higuchi

Iwama

Maekawa

2021

ACT

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This study presents an analytical method for estimating the remaining shear capacity of reinforced concrete (RC) beams subjected to high temperature heating and verifies it by experiments. We focused on the mechanism by which the remaining shear capacity of members self-recovers in a humid environment after slow cooling. The authors confirmed that the infiltration of water vapor in the air into concrete after heating caused rehydration of quicklime (CaO) produced by high-temperature heating and self-recovery of material strength. Based upon material experiments, the mechanical model of calcium hydroxide formation by rehydration of quicklime was incorporated into the multi-scale analysis. Using the proposed model of this study, the effect of damage on the remaining strength of damaged members was also investigated. It was confirmed that the series of high temperature heating, slow cooling, moisture absorption, selfhealing, and remaining shear capacity could be reproduced by the multi-scale analysis.

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Section: Experiments Of High Strength Rc Beams Subjected To High Temperature Heatingmentioning

confidence: 99%