A parametric study on shear deflection performance of open web steel joist

Abstract

This paper focuses on doing a parametric analysis to ascertain the shear deflection of an open web steel joist under non-uniform bending utilizing theoretical and numerical studies. The goal of this work is to determine the significance of taking shear deflection into account when dealing with open web steel joists as well as how it interacts with changes in beam parameter variations. Using ABAQUS software, a total of forty finite element models were created. The differences between these models may be seen in the flange and web slenderness ratios, which are derived from the three standard steel design codes. Theoretical shear deflection was calculated using Timoshenko and Gere's equations, and flexural deflection for the point load case was calculated using conventional formulae. Since theoretical equations up to the elastic limit are known, the elastic behaviour of the joists is the focus of the whole research. The result compares the load to the maximum elastic deflection obtained by theoretical and finite element analysis and demonstrates strong collaboration, validating the numerical investigation. Additionally, a plot of load versus deflections was made for fewer models, with and without taking into account shear deflection, demonstrating the significance of this factor. Finally, the variance in shear deflection was shown by plotting the total elastic deflections versus the load for all the models with various values. The study's findings suggest that it is significant to take the impact of shear and determine the shear deflection in the case of structural components such open web steel joists. The analysis further reveals that an open web steel joist's shear deflection is greatly impacted by the parametric variation.