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Dynamic Stability of a Railroad Bridge Using Bi-prestressing Technology  

Choi, Sanghyun (Department of Railroad Facility Engineering, Korea National University of Transportation)
Lee, Changsoo (Department of Civil Engineering, University of Seoul)
Lim, Jaehoon (Railroad Convergence Technology Center, Korea National University of Transportation)
Lee, Seungjoon (Civil Engineering Technology Group, POSCO E&C)
Yang, Sungdon (Civil Engineering Technology Group, POSCO E&C)
Publication Information
Journal of the Society of Disaster Information / v.9, no.2, 2013 , pp. 188-194 More about this Journal
Abstract
As the high speed railroad line increases, researches on developing a more economic high speed railroad bridge system have been actively conducted. In this paper, a new type of prestressed concrete girder based on the bi-prestressing technique, which can introduce additional prestress, is presented. The additional prestress can be introduced using a wedge-shaped pin bar into the upper part of the girder section. The applicability of the new girder technique to the high speed railroad bridge is verified via the dynamic stability analysis. Dynamic moving load analyses using the KTX train load are conducted on bridge systems with the span lengths of 30m, 35m, and 40m, respectively. The results of the analysis show that all bridge systems satisfy the limits prescribed in the design specifications to ensure structural stability, driving safety, and ride quality.
Keywords
bi-prestressing; wedge; pinbar; railroad bridge; dynamic stability;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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