Author : Md Manik Mia
Publisher :
ISBN 13 :
Total Pages : 128 pages
Book Rating : 4.:/5 (113 download)
Book Synopsis Investigation of Load-Slip Behavior and Fatigue Life of Headed Shear Stud Connector by : Md Manik Mia
Download or read book Investigation of Load-Slip Behavior and Fatigue Life of Headed Shear Stud Connector written by Md Manik Mia and published by . This book was released on 2017 with total page 128 pages. Available in PDF, EPUB and Kindle. Book excerpt: The use of composite structures in highway bridges has become a widespread practice and for developing composite action between steel beam and concrete slab, shear connectors are widely used. These shear connectors transfer the longitudinal shear forces developed at the interface between concrete slab and steel beam. Among different types of shear connectors, headed shear stud is most commonly used in practice. The strength and ductility of these connectors greatly influence the capacity of composite structures. In bridges, these shear studs are subjected to rapidly fluctuating stresses which may result in fatigue failure during the lifetime of the structure. Thus, the fatigue resistance of shear studs in composite beams is significant for the safe of whole structure and needs to be well investigated. The aim of this research work is to investigate the load-slip behavior and fatigue life of headed shear studs and assess the strength and fatigue requirements of current Canadian Standard, CSA S6-14. A three-dimensional finite element (FE) model of push out test is developed using commercial software package ABAQUS for predicting both fatigue life and static strength of headed shear studs. The FE model included both geometric and material nonlinearities. For fatigue life prediction both fatigue crack initiation life and crack propagation life are estimated. Excellent correlation against the test results for both fatigue life and static strength of shear stud is found. After validation, an extensive parametric study has been performed to investigate the effects of different parameters on load-slip behavior and fatigue life of shear stud connectors. Results from the FE analysis were also compared with current code of practices, such as European code (EC4), American code (AASHTO LRFD), Canadian code (CSA S6-14). The parametric study showed that both AASHTO and CSA S6-14 usually overestimate the static strength of headed shear stud connectors. The design provisions of European code, EC4 is found to give conservative estimation of shear capacity of headed shear stud. For fatigue life of shear stud a significant underestimation was found in case of AASHTO LRFD, while notable amount of overestimation was observed in case of CSA S6-14 demanding more study in this area. Currently, there is no provision available for fatigue life of shear studs when they are subjected to tension. This research project also examines the applicability of the current Canadian fatigue curves for design of shear studs when they are subjected to tension.