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Title: Modeling of concrete cracking due to corrosion process of reinforcement bars

The reinforcement corrosion in Reinforced Concrete (RC) is a major reason of degradation for structures and infrastructures throughout the world leading to their premature deterioration before design life was attained. The effects of corrosion of reinforcement are: (i) the reduction of the cross section of the bars, and (ii) the development of corrosion products leading to the appearance of cracks in the concrete cover and subsequent cover spalling. Due to their intrinsic complex nature, these issues require an interdisciplinary approach involving both material science and structural design knowledge also in terms on International and National codes that implemented the concept of durability and service life of structures. In this paper preliminary FEM analyses were performed in order to simulate pitting corrosion or general corrosion aimed to demonstrate the possibility to extend the results obtained for a cylindrical specimen, reinforced by a single bar, to more complex RC members in terms of geometry and reinforcement. Furthermore, a mechanical analytical model to evaluate the stresses in the concrete surrounding the reinforcement bars is proposed. In addition, a sophisticated model is presented to evaluate the non-linear development of stresses inside concrete and crack propagation when reinforcement bars start to corrode. The relationships betweenmore » the cracking development (mechanical) and the reduction of the steel section (electrochemical) are provided. Finally, numerical findings reported in this paper were compared to experimental results available in the literature and satisfactory agreement was found.« less
Authors:
 [1] ;  [1] ;  [1] ;  [2] ;  [2]
  1. Department of Chemical Engineering, Materials and Production, University of Naples “Federico II”, Napoli, Piazzale V. Tecchio 80, I-80125 Italy (Italy)
  2. Department of Structures for Engineering and Architecture, University of Naples “Federico II”, Via Claudio 21, I-80125 Napoli (Italy)
Publication Date:
OSTI Identifier:
22475503
Resource Type:
Journal Article
Resource Relation:
Journal Name: Cement and Concrete Research; Journal Volume: 71; Other Information: Copyright (c) 2015 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; COMPARATIVE EVALUATIONS; CORROSION PRODUCTS; CRACK PROPAGATION; CRACKS; ELECTROCHEMISTRY; FINITE ELEMENT METHOD; HARDNESS; PITTING CORROSION; REDUCTION; REINFORCED CONCRETE; SERVICE LIFE; STEELS; STRESSES; WEAR RESISTANCE