ANALYSIS OF CHLORIDE HETEROGENEOUS MIGRATION IN CONCRETE WITH TIME-SPACE CONSISTENT COLLOCATION METHOD

Author(s): Qin Zhang, Li Guo
Paper category: Proceedings
Book title: Proceedings of CONSEC13 Seventh International Conference on Concrete under Severe Conditions - Environment and Loading Volume I
Editor(s): Z.J. Li, W. Sun, C.W. Miao, K.Sakai, O.E. Gjørv, N.Banthia
ISBN: 978-2-35158-124-7
e-ISBN: 978-2-35158-134-6
Publisher: RILEM Publications SARL
Publication year: 2013
Pages: 407-417
Total Pages: 961
Language : English

Abstract: Chloride-induced corrosion of steel reinforcements has been identified as one of the main causes of deterioration in concrete structures. Therefore, analysis of chloride migration in concrete has become interesting topic. According to the nonlinear problem caused by chloride diffusion in concrete with non-homogenous coefficient, a new technique is proposed using the domain decomposition methods and the radial basis function (RBF) collocation methods. We decompose time and space domains simultaneously, and expand the unknown functions in corresponding sub-domain via RBFs. Additionally, the Hermite collocation method with RBF is utilized for solving the heterogeneous diffusion problem with Neumann boundary conditions. The related MATLAB program was complied to realize the developed method. Two numerical examples were performed to evaluate the accuracy and efficiency of the developed model. The results show that the developed method has more distinguished advantages than the finite element method to analyze heterogeneous diffusion problems. The proposed method provided a new numerical method to durability analysis of concrete structures in aggressive environment.

Online publication : 2013
Publication type : full_text
Public price (Euros) : 0.00