Study on Long-term Deflection Control Performance of Long-span Prestressed Concrete Combination Structure Rail Transit Bridges
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Bibliographic Details
| Author(s): |
Ya-ping Lai
(School of Civil Engineering, Chongqing University, Chongqing 400045, China & T.Y.Lin International Engineering Consulting（China）Co., Ltd., Chongqing 401121, China)
Ding Yang (T.Y.Lin International Engineering Consulting（China）Co., Ltd., Chongqing 401121, China) Lin Li (T.Y.Lin International Engineering Consulting（China）Co., Ltd., Chongqing 401121, China) |
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| Medium: | conference paper | ||||
| Language(s): | English | ||||
| Conference: | IABSE Congress: Bridges and Structures: Connection, Integration and Harmonisation, Nanjing, People's Republic of China, 21-23 September 2022 | ||||
| Published in: | IABSE Congress Nanjing 2022 | ||||
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| Page(s): | 223-231 | ||||
| Total no. of pages: | 9 | ||||
| DOI: | 10.2749/nanjing.2022.0223 | ||||
| Abstract: |
Rail transit bridges must meet stringent requirements for deflection control throughout the operation period. To provide a reference for the selection of bridge type and structure for long-span rail transit bridges, this paper conducted a comparative study of four PC(prestressed concrete) combination structure bridge types’ long-term deflection control performance. The structural configurations of the bridge types under research were trial designed using the same arrangement with a main span of 250 m and design parameters, and the Finite Element models for long-term deflection calculations were developed. According to the findings, all of these bridge types exhibit high vertical structural stiffness and excellent long-term deflection control performance, satisfying rail transit's technical requirements. Additionally, Excess weight and prestress loss have a less detrimental effect on arch-assisted girder bridges. |
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| Keywords: |
hybrid system；creep effect；influencing factors； long-term deflection prediction
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| Copyright: | © 2022 International Association for Bridge and Structural Engineering (IABSE) | ||||
| License: | This creative work is copyrighted material and may not be used without explicit approval by the author and/or copyright owner. |
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