Finite element simulation of precast moment resisting reinforced concrete beam-column joint subjected to monotonic load

Abstract

This paper investigated the structural behaviour of a monotonically loaded reinforced concrete (RC) beam-column joint with the precast moment-resistant connection situated distant from the face of the column. This study used ABAQUS software to perform the three-dimensional (3D) non-linear finite element (FE) analysis. The non-linear behaviour of the concrete and steel materials, the concrete-to-concrete interface behaviour and the bond-slip behaviour, were mainly focused on in this paper as they are key factors for modelling precast beam-column joints. Three approaches were used to simulate the concrete-to-concrete contact: cohesive and friction model, friction model only, and a thin layer of concrete with reduced strength. The FE results are verified by comparing them to the previously published experimental results of the precast beam-column joint under monotonic load in terms of the load–displacement curve and crack pattern. The FE results based on the three different modelling methods of the concrete-to-concrete interface were able to replicate the load–displacement response and crack patterns observed in the experimental test with an adequate level of accuracy. However, a slight difference in the predicted crack distribution among the three FE models was noticed. Overall, the FE model developed in this study, along with its modelling strategy, can be utilized as a useful tool for predicting the behaviour of precast structures with various design parameters.