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http://dx.doi.org/10.7782/JKSR.2016.19.4.515

Parameter Analysis for Design of Pretension Girder Bridge for Urban Maglev Transit  

Lee, Jae-Ho (Infra & Offshore Research Team, GS E&C)
Kim, Do-Hak (Infra & Offshore Research Team, GS E&C)
Kim, Seung-Hyun (Research Institute, Woosung Engineering and Consultant)
Kim, Sung-Il (Advanced Infrastructure Research Team, Korea Railroad Research Institute)
Publication Information
Journal of the Korean Society for Railway / v.19, no.4, 2016 , pp. 515-525 More about this Journal
Abstract
Parameter analysis of a pretension girder bridge for urban maglev transit was performed to identify the main design parameters and their effect. Girder deflection at mid-span is the most important design criteria of urban maglev transit. Therefore, concrete compressive strength, girder height, girder length, and unbonded tendon length were selected as the design parameters that relate to girder deflection. In addition, tendon layout and unbonded tendon ratios were also considered as design parameters to control the top stress of the pretension girder section at the support. The analysis results show that both the girder height and length are dominant design parameters governing girder deflection, more important than compressive strength and unbounded tendon length. And, sensitivity analysis makes this study suggest design weight value. In terms of stress, a tendon layout that can satisfy the unbounded tendon rule requires an additional tendon or rebar at the upper section to control the tensile stress on top of the section. Therefore, to improve feasibility and constructability in the future, an enhanced unbonded tendon rule considering the load characteristics of the urban maglev system should be studied.
Keywords
Urban maglev transit; Pretension girder; Optimal design; Sensitivity analysis; Unbonded tendon;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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