|
|
|
| Influences of Random Deviations in Cable Tension Force on the Stress State of a Composite Girder Cable Stayed Bridge Without Backstays |
| LIU Shi-ming1,3, JU Ming-jie2, LIU Yong-jian3 |
1. School of Civil Engineering and Communications, North China University of Water Resources and Electric Power, Zhengzhou Henan 450045, China;
2. Dongguan Transport Investment Group Co., Ltd., Dongguan Guangdong 523120, China;
3. Key Laboratory for Bridge Detection and Reinforcement Technology of Ministry of Transport, Chang'an University, Xi'an Shaanxi 710064, China |
|
|
|
|
Abstract Considering the limitations in construction technology, deviations in the initial tension force of cables often exist. Herein, we established an analytical model through the finite-element analysis software ANSYS to study the influences of random deviations in cable tension force on the stress of pylon, beam, and cable, as well as the deformation of pylon and beam and the structural reliability of the construction of Dongguanshuidao bridge. This bridge is a composite-girder cable-stayed bridge without backstays. In our model, Monte Carlo method and Latin hypercube important sampling technique were used. Sensitivity factor and percentage of structural response were analyzed, and reliability analysis of the control-section stress was carried out. Results showed the following. First, the stress of pylon, beam, and cable, as well as the deformation of the pylon and beam, presented significant asymmetry. The related sensitivity factors had high disparities; among them, the standard deviation of stress and deformation in the side span of the beam and pylon were the least impacted by the initial cable force. Second, the initial cable force had the most influence on the final cable force of the cable, and the related number was consistent. The error level of the initial cable force was controlled according to the guidelines for the design of a highway cable-stayed bridge.
|
|
Received: 11 December 2019
|
| Fund:Supported by the National Natural Science Foundation of China (Nos. 51178051, 51508189); Key Laboratory for Bridge Detection and Reinforcement Technology of Ministry of Communications, Chang'an University (No. 2014G150200) |
|
Corresponding Authors:
LIU Shi-ming
E-mail: sokd_0@163.com
|
|
|
|
[1] HU Fang-jian, LI Guo-ping. Influences of Deviation of Gravity and Cable Tension Force on Construction State of Cablestayed Concrete Bridges[J].Journal of Tongji University:Natural Science Edition,2012,42(2):191-197. (in Chinese)
[2] SU Cheng, FAN Xue-ming. Stochastic Analysis of Yamen Bridge at Erection Stage in Consideration of Variant Material and Loading Parameters[J]. Bridge Construction, 2003(1):62-65. (in Chinese)
[3] SHI Zhi-yong, LI Xin-ran, ZHOU Xiong-wei, et al. Research on Ultimate Bearing Capacity for Long-span Cable-stayed Bridges due to Construction Deviation during Erection[J]. Structural Engineers, 2008,24(3):145-151. (in Chinese)
[4] PANG Jian. Stochastic Analysis and Reliability Analysis of Shrinkage and Creep Effects for Long-span Prestressed Concrete Cable-stayed Bridge[D].Guangzhou:South China University of Technology,2010. (in Chinese)
[5] XIANG Xu-xia, JIN En, CHEN De-wei. Response Analysis of Cable-Stayed Bridges Due to Random Deviation of Stay Cable Tension[J]. Structural Engineers, 27(1):154-160. (in Chinese)
[6] GUAN Hua, SHANGGUAN Xing. Static Random Analysis of Concrete Cable-stayed Bridges Due to Construction Error[J]. Journal of China & Foreign Highway, 2013,33(1):159-163. (in Chinese)
[7] ZHOU Xiong-wei. Research on Ultimate Bearing Capacity for Long-span Cable-stayed Bridge due to Construction Error[D]. Shanghai:Tongji University,2007. (in Chinese)
[8] LIU Shi-ming, LIU Yong-jian, JU Ming-jie. Construction Optimization of Curved-pylon and Curved-girder Cable-stayed Bridge without Back Stay[J]. Journal of Highway and Transportation Research and Development, 2015,32(11):68-74,80. (in Chinese)
[9] LIU Shi-ming, ZHAO Shun-bo, LI Xiao-ke. Analysis of Static,Dynamic and Seismic Performance of Long Span Irregular-Shape Pedestrian Cable-Stayed Bridge[J]. Bridge Construction,2012, 42(4):45-50. (in Chinese)
[10] LIU Shi-ming, LIU Yong-jian. Analysis of Parameter Sensitivity for Curved-pylon and Curved-girder Cable-stayed Bridge without Back-stay[J]. Journal of Highway and Transportation Research and Development,2014, 31(2):54-59. (in Chinese)
[11] JU Ming-jie. Mechanical Performance Analysis on Curved-pylon and Curved-girder Cable-stayed Bridge without Backstay[D]. Xi'an:Chang'an University,2011. (in Chinese)
[12] LI Xiao-ke, LIU Shi-ming, YANG Zhu-lin. Design Instance Analysis of Prestressed Concrete Continuous Box-girder Bridge[M].Beijing:China Electric Power Press,2015:24-27. (in Chinese)
[13] CHEN Zhao-shuan. Research on Probabilistic Method of Construction Monitoring and Control of Prestressed Concrete Cable-stayed Bridges[D]. Nanjing:South China University of Technology,2012. (in Chinese)
[14] JIN Lu, ZHANG Zhuang-nan,WANG Chun-gang, et al. Monte Carlo-based Analysis Method Considering Random Intial Imperfections[J]. Engineering Mechanics, 2012,29(S2):93-96. (in Chinese) |
|
|
|
2020, Vol. 14 
