Pushout Tests on Headed Studs and PBL Shear Connectors Considering External Pressure
Publication: Journal of Bridge Engineering
Volume 25, Issue 1
Abstract
In composite structures, the shear keys, that is, the headed studs or the perfobond rib shear connectors (PBL shear connectors), are typically subjected to external pressure, owing to the self-weight of the pavement and safeguards, for example. These loads may exert some influence on the shear behavior of such shear keys. To investigate the shear behavior of the headed studs and PBL shear connectors under external pressure, eight specimens were tested, and the slip-load curve and crack developments were obtained. According to the test results, the external pressure significantly contributed to the stiffness and strength of the headed studs owing to the friction effect. The relative improvement for the PBL shear connectors was not very obvious owing to its huge basic capacity. For the PBL shear connectors, the external pressure resulted in the slight relative enhancement of the load-carrying capacity regardless of the friction force. Employing the confining concrete strength improved the prediction of the PBL shear connectors, and the estimation error was reduced to less than 0.3%.
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Acknowledgments
This study was supported by the National Key Research and Development Program of China (Grant No. 2016YFB1200401), the National Natural Science Foundation of China (Grant Nos. 51708466 and 51878564), the Sichuan Science and Technology Program (Grant Nos. 2018GZ0052 and 2019YFH0139), and Fundamental Research Funds for the Central Universities (Grant No. 2682017CX002).
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Published In
Journal of Bridge Engineering
Volume 25 • Issue 1 • January 2020
Copyright
©2019 American Society of Civil Engineers.
History
Received: Jan 21, 2019
Accepted: Jul 24, 2019
Published online: Oct 22, 2019
Published in print: Jan 1, 2020
Discussion open until: Mar 22, 2020
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