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A new shear stud connector for composite steel-concrete beams
This report presents the preliminary results of an experimental and analytical study designed to develop a new shear connector for composite steel-concrete beams. The innovative characteristic of this stud proposition patented by Spit, lies in the design features of the connector's base, which presents a special cold formed shape. The push-out test has been employed to assess the shear strength as well as the load-slip characteristics of the Spit connector. A remarkable ductile behavior has been observed in all of the push-out tests. These results have been compared with those issues from a three-dimensional FEM analysis. From these results, it is clear that the geometrical peculiarity of the Spit shear connector induces a remarkable improvement on the strength of composite connection device to undergo large deformations (while maintaining its load-carrying capacity) accomplish the requirements for a plastic design. Therefore, a total or partial-interaction plastic theory could be used in the composite design of slabs and beams having this new kind of shear connector. On the other hand, the spit connector can be fast fastened even under wet weather conditions which prohibits welding of conventional shear studs. As both, the mechanical strength and ductility of composite beams are improved, more efficient and economical composite beams can be obtained with this innovator shear stud. Additional tests are needed to be carried out to establish a proper design equation for this new connector and also, to find out the influence of the shear connector spacing, of cyclic loading and of concrete strength.
A new shear stud connector for composite steel-concrete beams
This report presents the preliminary results of an experimental and analytical study designed to develop a new shear connector for composite steel-concrete beams. The innovative characteristic of this stud proposition patented by Spit, lies in the design features of the connector's base, which presents a special cold formed shape. The push-out test has been employed to assess the shear strength as well as the load-slip characteristics of the Spit connector. A remarkable ductile behavior has been observed in all of the push-out tests. These results have been compared with those issues from a three-dimensional FEM analysis. From these results, it is clear that the geometrical peculiarity of the Spit shear connector induces a remarkable improvement on the strength of composite connection device to undergo large deformations (while maintaining its load-carrying capacity) accomplish the requirements for a plastic design. Therefore, a total or partial-interaction plastic theory could be used in the composite design of slabs and beams having this new kind of shear connector. On the other hand, the spit connector can be fast fastened even under wet weather conditions which prohibits welding of conventional shear studs. As both, the mechanical strength and ductility of composite beams are improved, more efficient and economical composite beams can be obtained with this innovator shear stud. Additional tests are needed to be carried out to establish a proper design equation for this new connector and also, to find out the influence of the shear connector spacing, of cyclic loading and of concrete strength.
A new shear stud connector for composite steel-concrete beams
Ein neuer Scherbolzen für Verbundträger aus Betonstahl und Beton
Arroyo Matus, R. (author) / Jullien, J.F. (author)
1996
7 Seiten, 12 Bilder, 5 Quellen
Conference paper
English
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