Abstract
A series of full-scale pushed out tests were performed on the Perfobond rib shear connector. The tests were designed to examine the performance of the Perfobond rib shear connector under different rib hole sizes and shapes, reinforcing bar sizes, rib thicknesses, as well as the presence of lateral forces. It has been revealed from the test results that the rib hole size and reinforcement diameter may not act independently, and the influence of one’s size is actually dependent on the size of the other one. The lateral forces also affect the performance of the shear connector; for example, the capacity of the shear connector would be larger under compression than under tension. The existence of transverse pretension stress accelerated the cracking of concrete, leading to the strength and stiffness of concrete, perforated plate, and reinforcing rebars unable to fully exert their effect. In addition, the constraint effect of transverse stress improved the strength and stiffness of concrete and delayed the concrete cracking, bringing the strength and stiffness of concrete, perforated plate, and reinforcing rebars into full play, and resulting in a significant improvement in the shear capacity of Perfobond rib shear connectors.
Highlights
Steel–concrete composite girders are widely used because of their superior durability and accelerated construction time
The Perfobond rib shear connector serves as an option because it has advantages over the traditional shear studs of very minimal slip under service condition and being able to maintain the connection between the slip and the live load under the associated fatigue threshold
Pu is average valuevalue of theofshear bearing capacity of theofsingle-hole shear shear connector, which is obtained by dividing the total shear bearing capacity the connector, which is obtained by dividing the total shear bearing capacity of the of porous porous shear connector by the number of shear connectors; δ is the average value of the u average value of the correshear connector by the number of shear connectors; δu is the corresponding sponding slip.slip
Summary
Steel–concrete composite girders are widely used because of their superior durability and accelerated construction time. The Perfobond rib (Perfobond Leiste in German [1]) shear connector represents a type of shear connector that is perforated and reinforced with steel bars to utilize the dowel action to provide more reliable shear resistance than the traditional stud shear connectors in composite construction. The Perfobond rib shear connector was introduced in 1987 by a German consulting firm as the result of the construction of the 3rd Caroni River Bridge in Venezuela [1]. The Caroni River Bridge was designed to take a heavy live load and that live load over time may result in connection fatigue issues if traditional shear studs were to be used. The Perfobond rib shear connector serves as an option because it has advantages over the traditional shear studs of very minimal slip under service condition and being able to maintain the connection between the slip and the live load under the associated fatigue threshold
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