Analytical Study on Internal Force Transfer of Perfobond Rib Shear Connector Group Using a Nonlinear Spring Model
Publication: Journal of Bridge Engineering
Volume 22, Issue 10
Abstract
The perfobond rib (PBL) shear connector group composed of multiple layers of PBL shear connectors has been proven to be one of the most effective load-transferring components and is widely used in cable-stayed bridges. In this study, an analytical method was developed to analyze the internal force transfer of a PBL shear connector group, based on the nonlinear equivalent stiffness of key components, which include the shear connectors, perforated steel plate, and concrete base. Explicit analytical expressions of the internal force distribution among different layers of shear connectors were derived and validated against experimental results. Uneven force distributions resulting from the different equivalent stiffnesses of different layers of shear connectors were demonstrated. Key factors influencing the load distribution include the stiffness of the perforated steel plate, concrete base, and shear connectors. The unevenness of the load distribution was found to gradually decrease with the development of plastic deformation of the shear connectors. The proposed method offers an efficient and practical approach to investigating the mechanical behavior of a PBL shear connector group and quantifying its property of uneven internal force distribution.
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Acknowledgments
This study was funded by the National Natural Science Foundation of China (Grants 51578455, 50908192, 51178394, and 51408506), the Fundamental Research Funds for the Central Universities (Grant 2682014CX078), and the National Science and Technology Support Program of China (Grant 2011BAG07B03).
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Published In
Journal of Bridge Engineering
Volume 22 • Issue 10 • October 2017
Copyright
© 2017 American Society of Civil Engineers.
History
Received: Nov 28, 2016
Accepted: May 12, 2017
Published online: Aug 11, 2017
Published in print: Oct 1, 2017
Discussion open until: Jan 11, 2018
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