Model Test and Optimal Design of the Joint in a Sunflower Arch Bridge
Publication: Journal of Bridge Engineering
Volume 24, Issue 2
Abstract
The sunflower arch bridge is a new type of reinforced concrete arch bridge that has been developed recently. Because of the complex constructional details, the stress distribution at the joint between the main arch and spandrel arch is very complicated. To explore the mechanical behavior of this new type of arch bridge, particularly the stress state at the joint of the arch, a 1:5-scaled model of a segment for a sunflower arch bridge was tested. The displacements and stresses at key locations of the tested model were recorded. The experimental results showed that the displacements of the main arch and spandrel arch under dead loads were notably small, which indicated that the global stiffness of the arch was sufficiently large. Moreover, the maximum tensile stress at the end of the spandrel arch subjected to dead loads was larger than the tensile strength of the concrete; therefore, the concrete in these regions is vulnerable to cracking. To avoid cracks at the end of the spandrel arch, an optimized design scheme was proposed for the joint using a steel I-beam to replace the concrete at the end of the spandrel arch. Design parameters were also suggested through a comprehensive parametric investigation based on finite-element analysis (FEA).
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Acknowledgments
This research was financially supported by the National Natural Science Foundation of China (51678169), the Pearl River S&T Nova Program of Guangzhou (201605061406434), the Technology Planning Project of Guangdong Province (2016B050501004), and the Scholarship of the Chinese Scholarship Council (201708440154). Moreover, the Guangdong Province Communications Planning & Design Institute that designed the background bridge is also acknowledged.
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Published In
Journal of Bridge Engineering
Volume 24 • Issue 2 • February 2019
Copyright
© 2018 American Society of Civil Engineers.
History
Received: May 14, 2018
Accepted: Aug 9, 2018
Published online: Dec 7, 2018
Published in print: Feb 1, 2019
Discussion open until: May 7, 2019
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