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Appl. Sci. 2018, 8(7), 1136; https://doi.org/10.3390/app8071136

Fatigue Behavior of Prestressed Concrete Beam for Straddle-Type Monorail Tracks

1
Department of Bridge Engineering, School of Civil Engineering, Southwest Jiaotong University, Chengdu 610031, China
2
Key Laboratory of High-speed Railway Engineering of the Ministry of Education, Southwest Jiaotong University, 111 Section of the Northbound 1, Second Ring Rd., Chengdu 610031, China
3
Department of Civil and Environmental Engineering, University of Michigan, 500 S State St, Ann Arbor, MI 48109, USA
4
Sichuan Jiaoda Inspection and Consulting Engineering Company Limited, Chengdu 610031, China
*
Author to whom correspondence should be addressed.
Received: 24 June 2018 / Revised: 6 July 2018 / Accepted: 9 July 2018 / Published: 13 July 2018
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Abstract

Monorail transportation systems are widely built in medium and small cities, as well as hilly cities, because of their excellent performance. A prestressed concrete track beam is a key load-carrying structural component and guideway subjected to repeated traffic load. The fatigue behavior of the prestressed concrete beam is critical for the safety of the transportation system. This paper presents the results of an experimental study on the fatigue behavior of a prestressed concrete beam in terms of stiffness degradation and strain change. The displacement and rotation of the beam of concrete and reinforcement were examined, respectively. A three-dimensional finite element model was established to help understand the development of the mechanical behavior. No crack was observed throughout the test. Both concrete and bars behaved in their linear-elastic stage throughout the test, and the bond between them performed well. View Full-Text
Keywords: straddle-type monorail transportation; prestressed concrete beam; model test; fatigue; stiffness degradation straddle-type monorail transportation; prestressed concrete beam; model test; fatigue; stiffness degradation
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).
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Pu, Q.; Wang, H.; Gou, H.; Bao, Y.; Yan, M. Fatigue Behavior of Prestressed Concrete Beam for Straddle-Type Monorail Tracks. Appl. Sci. 2018, 8, 1136.

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