Non-linear Analysis of Concrete Elements Using Fiber Section Modelling

Reinforced and unreinforced concrete elements exhibit non-linear behaviour, and modelling such elements is crucial for structural design. Modelling of these members is computationally intensive and challenging due to many factors like non-linear material properties. The present study aims to implement a non-linear analysis of reinforced and unreinforced concrete elements using displacement-based fiber section modelling. In the numerical program, the load-deformation of the RC column and solid concrete masonry prism under axial compression were predicted using the proposed fiber model. The validation of the proposed model was done for masonry prism specimens.The load-deformation values from the fiber model were compared with experimental values obtained from the compression test. The results show that predicted values from the fiber model were in close agreement with the experimental values. The developed fiber model is useful for infill wall modelling and probabilistic analysis of RCC members accounting material non-linearity. The paper attempts to predict the load carrying capacity of reinforced and unreinforced concrete elements under axial compression using fiber section modelling.