Techno Press
You logged in as Techno Press

Structural Engineering and Mechanics
  Volume 41, Number 5, March10 2012 , pages 645-662
DOI: https://doi.org/10.12989/sem.2012.41.5.645
 


Simulation of corroded RC structures using a three-dimensional irregular lattice model
Kunhwi Kim, John E. Bolander and Yun Mook Lim

 
Abstract
    Deteriorative effects of steel corrosion on the structural response of reinforced concrete are simulated for varying degrees of corrosion. The simulation approach is based on a three-dimensional irregular lattice model of the bulk concrete, in which fracture is modeled using a crack band approach that conserves fracture energy. Frame elements and bond link elements represent the reinforcing steel and its interface with the concrete, respectively. Polylinear stress-slip properties of the link elements are determined, for several degrees of corrosion, through comparisons with direct pullout tests reported in the literature. The link properties are then used for the lattice modeling of reinforced concrete beams with similar degrees of corrosion of the main reinforcing steel. The model is successful in simulating several important effects of steel corrosion, including increased deflections, changes in flexural cracking behavior, and reduced yield load of the beam specimens.
 
Key Words
    steel corrosion; reinforced concrete; irregular lattice model; concrete-reinforcement interface; fracture
 
Address
Kunhwi Kim: Department of Civil & Environmental Engineering, Yonsei University, Seoul, Korea
John E. Bolander: Department of Civil & Environmental Engineering, University of California, Davis, USA
Yun Mook Lim: Department of Civil & Environmental Engineering, Yonsei University, Seoul, Korea
 

Techno-Press: Publishers of international journals and conference proceedings.       Copyright © 2024 Techno Press
P.O. Box 33, Yuseong, Daejeon 305-600 Korea, Tel: +82-42-828-7996, Fax : +82-42-828-7997, Email: admin@techno-press.com