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contributor authorJinquan Zhong
contributor authorPaolo Gardoni
contributor authorDavid Rosowsky
date accessioned2017-05-08T21:43:13Z
date available2017-05-08T21:43:13Z
date copyrightFebruary 2010
date issued2010
identifier other%28asce%29em%2E1943-7889%2E0000083.pdf
identifier urihttp://yetl.yabesh.ir/yetl/handle/yetl/60524
description abstractCorrosion-induced cracks in reinforced concrete (RC) structures degrade the stiffness of the cover concrete. The stiffness degradation is mainly caused by the softening in the stress-strain relation in the cracked concrete. Limited efforts have been made to model the cracking and the corresponding effects on the cover concrete, despite of its importance in assessing and modeling the behavior of RC structures. This paper proposes a stiffness degradation factor to model the stiffness degradation of the cover concrete subject to cracking. The proposed factor is computed in terms of the cracking strain corresponding to the maximum opening of the concrete cracks based on an energy principle applied to a fractured RC structure. The time to cracking of the cover concrete is then determined as the time from the corrosion initiation needed by the crack front to reach the outer surface of the cover concrete. The proposed stiffness degradation factor and the method to compute the time to cracking are illustrated through two numerical examples. The times to cracking of the cover concrete that are predicted using the proposed method are in agreement with the measured values from laboratory experiments.
publisherAmerican Society of Civil Engineers
titleStiffness Degradation and Time to Cracking of Cover Concrete in Reinforced Concrete Structures Subject to Corrosion
typeJournal Paper
journal volume136
journal issue2
journal titleJournal of Engineering Mechanics
identifier doi10.1061/(ASCE)EM.1943-7889.0000074
treeJournal of Engineering Mechanics:;2010:;Volume ( 136 ):;issue: 002
contenttypeFulltext


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