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Advances in Concrete Construction
  Volume 7, Number 1, February 2019, pages 11-22

Numerical simulation approach for structural capacity of corroded reinforced concrete bridge
Xuhong Zhou, Xi Tu, Airong Chen and Yuqian Wang

Abstract     [Full Text]
    A comprehensive assessing approach for durability of reinforced concrete structures dealing with the corrosion process of rebar subjected to the attack of aggressive agent from environment was proposed in this paper. Corrosion of rebar was suggested in the form of combination of global corrosion and pitting. Firstly, for the purposed of considering the influence of rebar\'s radius, a type of Plane Corrosion Model (PCM) based on uniform corrosion of rebar was introduced. By means of FE simulation approach, global corrosion process of rebar regarding PCM and LCM (Linear Corrosion Model) was regressed and compared according to the data from Laboratoire Matériaux et Durabilite des Constructions (LMDC). Secondly, pitting factor model of rebar in general descend law with corrosion degree was introduced in terms of existing experimental data. Finally, with the comprehensive numerical simulation, the durability of an existing arch bridge was studied in depth in deterministic way, including diffusion process and sectional strength of typical cross section of arch, crossbeam and deck slab. Evolution of structural capacity considering life-cycle rehabilitation strategy indicated the degradation law of durability of reinforced arch bridges.
Key Words
    reinforced concrete structures; diffusion; corrosion; durability; service life
Xuhong Zhou, Xi Tu: Key Laboratory of New Technology for Construction of Cities in Mountain Area, Chongqing University, Ministry of Education, Chongqing, China
Airong Chen: Department of Bridge Engineering, Tongji University, Shanghai, China
Yuqian Wang: China-Road Transportation Verification & Inspection Hi-Tech Co. Ltd., Beijing, China

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