Author:
Yao Sisi,Peng Biao,Wang Luyao,Chen Hengda
Abstract
AbstractContinuous rigid-frame bridges are widely used, but the large deflection in the mid-span during operation has always been their disease. This problem is generally solved by setting the finished bridge pre-camber. There are many calculation methods for pre-camber, and the effects are different. In this paper, based on a large number of design parameters of continuous rigid-frame bridges obtained from the investigation, 18 finite element analysis models of different span combinations were established, and 30 sets of valid data were obtained under the action of multi-factor. The results show that the shrinkage and creep of concrete is the most important factor for the mid-span deflection of continuous rigid frame bridges, and the deflection amount has an obvious functional relationship with the span. The effect of prestress loss on mid-span deflection is second, and stiffness reduction has little effect on mid-span long-term deflection. In this paper, the least-squares method is used to perform polynomial fitting, and the fitting formula for the mid-span finished bridge pre-camber is finally obtained. The applicability of the calculation formula is proved by comparing it with the specification solution, the empirical solution, and the measured value.
Funder
Shaanxi Provincial Department of Transportation Science and Technology Project
Technology Innovation Center for Land Engineering and Human Settlements, Shaanxi Land Engineering Construction Group Co.,Ltd and Xi'an Jiaotong University
project of Shaanxi Provence Land Engineering Construction Group
Publisher
Springer Science and Business Media LLC
Reference28 articles.
1. Specification for design of highway reinforced concrete and prestressed concrete bridges and culverts. Ministry of Transportation of the People, Republic of China, Beijing, China Communications Press. JTG 3362–2018.
2. Zhang, Y.B., & Liu, D.P. Research on setting of pre-camber of long-span continuous rigid frame bridge with high piers. International Conference on Civil Engineering and Building Materials. Kunming, China. July. 821, 255–260 (2011).
3. Sousa, H., Bento, J. & Figueiras, J. Construction assessment and long-term prediction of prestressed concrete bridges based on monitoring data. Eng. Struct. 52, 26–37 (2013).
4. Shao, J. H., Duan, M. J., Yang, W. & Li, Y. Z. Research on the critical technique of synchronous rotation construction with large angle for T-shape curve rigid frame bridge. Sci. Rep. 12, 35087118. https://doi.org/10.1038/s41598-022-05403-8 (2022).
5. Liu, Y., Zheng, C., Ba, H.Q., Xu, G.L., Li, C. & Xie, Q.Y. Analysis on the influence factors of construction linear control of continuous rigid structure bridge. 3rd International Symposium on Architecture Research Frontiers and Ecological Environment. Zhangjiajie, China. Dec. 237, 20434741 (2020).
Cited by
2 articles.
订阅此论文施引文献
订阅此论文施引文献，注册后可以免费订阅5篇论文的施引文献，订阅后可以查看论文全部施引文献