Evaluation of the resistant capacity for reinforced concrete pier cap affected by Alkali Silica Reaction and repaired effect on the beam by steel-plate-bonding by numerical analysis

Abstract

Many Reinforced Concrete (RC) piers of Hanshin Expressway have been damaged by Alkali Silica Reaction (ASR). Hanshin expressway has repaired these piers by bonding steel plates. In this study, the load resistant capacity for RC beam affected by ASR and repaired beam by steel-plate-bonding by using 3-Dimensional non-linear Finite Element Method analysis (3D FEM). In this analysis, the influence of ASR on the load resisting mechanism or capacity was clarified by using 3D FEM that modeled the each physical phenomenon such as the degradation of adhesion between steel plate and concrete, elastic coefficient of concrete and the fracture of reinforcing bar. Furthermore, the repair effect of RC pier cap by using steel-plate-bonding method is also evaluated by the 3D FEM, considering the steel plates and epoxy resin elements.