Computational simulation of precast beam-to-beam connection subjected to monotonic static load.

Abstract

Precast beam-to-beam connections have recently become feasible for constructing emulative moment resistance connections in frame building systems with optimised design and less complex connection details. In the numerical simulation of the precast reinforced concrete (RC) connection, the definition of the interface behaviour between the precast and post-cast concrete elements, the linking modelling of discontinuous main bars and the proper selection of constitutive material laws are the key factors toward the success of the finite element (FE) application in precast RC connection. Despite the growing research on the numerical simulation of precast connections, most of them tend to either assume a perfect bond or frictional behaviour between precast and post-cast concrete. This could overestimate the results in the first assumption and neglect the adhesive bonding in the second one. Further, less consideration on the main bars’ continuity modelling in the previous FE studies. Therefore, this paper presents a 3D non-linear finite element analysis for precast RC beam-to-beam connection using ABAQUS software, focusing on material property definition, concrete-to-concrete interface interaction, and reinforcing bars continuity. This study aims at determining the structural behaviour of precast beam-to-beam connections under monotonic static load. Results of the FE model showed a good agreement with experimental results in terms of crack patterns and load capacity. Overall, the FE model developed in this study can be adopted as an effective tool in predicting the performance of precast RC frame connections.