Finite element prediction of reverse channel connections to tubular columns behavior

Abstract

This paper attempts to introduce a standardized moment-rotation function for reverse channel flush end-plate connection (RCC). This function is expressed in terms of the geometric parameters for the purposes of either predicting the connection behavior or incorporating the behavior into a frame analysis computer program. With this objective a parametric study was carried out, based on modeling of 140 RCC under monotonic loading by using the general finite element package ABAQUS. Out of the six currently available functions, the Kishi–Chen and Richard–Abbott models were proved appropriate for fitting experimental M–ϕ data for RCC. The two functions were successfully used in this parametric study to express the relationships for 140 specimens, where the analytical and predicted data are in very good agreement. However, the results of the fitted functions indicate that the dimensionless form of Richard–Abbott function provides more accuracy than Kishi–Chen function. Furthermore, the comparison of Eurocode 3 model with numerical M–ϕ curves illustrated a significant overestimation of the knee region behavior for most of the cases, particularly for RCC with low initial stiffness.