Numerical modelling of extended endplate and composite flush endplate connections

摘要

The results of a number of finite element analyses are reported to highlight methods of modelling steel endplate and composite connections. The ANSYS finite element package has been used to develop models using both solid and shell elements for the beam, column and endplates. Test results have been used to calibrate an extended endplate model, and assess the performance of the shell and solid elements. A discussion of the bolt model is included, with details of the moment-rotation curves and the stresses in the endplate. The extended endplate model is developed farther to include the strength contribution of the slab in a composite connection. Methods of providing the stiffness and strength of the reinforcement and shear connection are discussed. The complicated force transfer through the connection is identified using the finite element model. Based on the contact elements the prying forces between the plates are determined. The model is shown to be accurate and numerically stable and suitable for assessing engineering design standards such as EC3 and EC4.