Pandit, Poornachandra and Gogogi, Indrani and Babunarayan, K S (2011) Effect of Corrosion on Performance of Reinforced Concrete structure using Pushover analysis. International Journal of Earth Sciences and Engineering, 4 (6). pp. 885-888. ISSN 0974-5904

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Abstract

In Reinforced concrete structures, the safety and serviceability is a time-dependent variation of the structural response due to degradation phenomena. This degradation process may be induced by diffusive attack of environmental aggressive agents such as chloride and sulphate ions, or by carbonation phenomenon, alkali-aggregate reaction, etc. In reinforced concrete, the most serious deterioration mechanisms are those leading to reinforcement corrosion, which may occur only after depassivation due to carbonation of concrete cover, penetration of chloride ions, or a combination of both. In this paper an attempt is made to study the performance of RC structure due to corrosion of the rebars analytically. A Pushover analyses present in Structure Analysis Program (SAP)-2000 is used for the analysis. The Pushover tool is nonlinear static analysis tool and is very sensitive to strength of steel. The analysis is done on the bare frame when exterior beams and columns are corroded. From the results it is seen that there will be reduction of load bearing capacity and also structural ductility for all the tests considered. Also the shift in failure mechanism from ductile to brittle type is seen for some of the cases. From the results it is concluded that the corrosion is an important phenomena need to be incorporated analytically in the design of structures

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