Glass fiber reinforced gypsum (GFRG) panels are used as walls and slabs with reinforced concrete (RC) infilled in their cavities. The behavior prediction of RC infilled GFRG walls under lateral load requires proper modelling techniques. In the present study, a simplified analytical model is proposed for the estimation of lateral load-displacement behavior of GFRG walls with RC infill. The model uses the moment-curvature relations developed using the proposed algorithm assuming linear strain variation along the width of the wall. The effect of interfacial slip is also accounted for in the present formulation by applying a correction factor to initial stiffness. The predicted values showed reasonable match when compared with experimental results.
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