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Dynamic Behavior of a Prestressed Concrete Bridge with a Switching Crack Subjected to Moving Trains
Author
Source
Mathematical Problems in Engineering
Issue
Vol. 2016, Issue 2016 (31 Dec. 2016), pp.1-12, 12 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2016-09-01
Country of Publication
Egypt
No. of Pages
12
Main Subjects
Abstract EN
Concrete bridges chronically exposed to the natural environment are vulnerable to cracking.
Under prestressing forces, the crack may close, but it will open under large dynamic loads, such as heavy trains.
So the crack state can switch during the vibration.
This paper investigates the nonlinear dynamic behavior of the prestressed concrete bridge with such a switching crack subjected to moving trains.
Firstly, the finite element method is adopted to formulate the motion equations of train-bridge system while the crack state remains constant.
Then the displacement components are analyzed to investigate the effect of static loads at the switching instant.
Finally, an iterative algorithm is adopted to calculate the nonlinear responses.
The proposed method is verified by the calculation of an actual prestressed concrete bridge, and the results show that the crack switching can increase the peak of the bridge displacement during the vibration, cause an obvious nonlinearity between the displacement and the vehicle mass, and make the displacement become more variable with the train velocity.
American Psychological Association (APA)
Fu, Chunyu. 2016. Dynamic Behavior of a Prestressed Concrete Bridge with a Switching Crack Subjected to Moving Trains. Mathematical Problems in Engineering،Vol. 2016, no. 2016, pp.1-12.
https://search.emarefa.net/detail/BIM-1112040
Modern Language Association (MLA)
Fu, Chunyu. Dynamic Behavior of a Prestressed Concrete Bridge with a Switching Crack Subjected to Moving Trains. Mathematical Problems in Engineering No. 2016 (2016), pp.1-12.
https://search.emarefa.net/detail/BIM-1112040
American Medical Association (AMA)
Fu, Chunyu. Dynamic Behavior of a Prestressed Concrete Bridge with a Switching Crack Subjected to Moving Trains. Mathematical Problems in Engineering. 2016. Vol. 2016, no. 2016, pp.1-12.
https://search.emarefa.net/detail/BIM-1112040
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1112040