Nonlinear Finite Element Analysis of RC Structures Incorporating Corrosion Effects

作者：Gopinath Smitha^*; Murthy A Ramachandra; Iyer Nagesh R

来源：Computers Materials & Continua, 2011, 22(1): 55-71.

• Damage Indicator
• Reinforced Concrete Structures
• Corrosion
• Nonlinear Finite Element Analysis, Chimney

This paper presents the mathematical modeling techniques for nonlinear finite element analysis of RC structure to incorporate uniform corrosion effects. Effect of corrosion has been simulated as reduction in effective cross-sectional area of reinforcing bar, reduction in bonding phenomena and as reduction in material properties of reinforcing bar such as yield strength and elastic modulus. Appropriate constitutive laws for (i) corroded rebar elements and (ii) bond slip with corroded bar have been described. Procedure has been outlined to determine the global damage indicator by secant stiffness based approach. A corroded RC beam has been analysed to validate the proposed model and results have been compared with experimental response. A RC chimney has been analysed by considering the uniform corrosion effects. The result of corroded chimney shows the growth of damage with respect to increase in age of the structure. The results will give an insight for the maintenance and repair measures to be taken during the service life.

• 出版日期2011-3