Analysis on Axial Stresses of Crossbars on Aqueduct

Abstract:

By use of finite element method, the axial stresses of crossbars on the top of a simply supported rectangular-sectioned aqueduct were calculated in this paper. Three factors were considered, namely height-width ratio, water depth and crossbars spacing. The results show that, most crossbars are in compression when the height-width ratio of aqueduct cross-section is small, and with the height-width ratio increasing, the axial forces of crossbars change from compression to tension; Under a certain height-width ratio, when water depth is relatively small, most crossbars are in compression, and with the increase of water depth, axial forces of crossbars change from compression to tension; big axial tensile force is harmful to the rectangular cross-section floor (mid-span), but favorable to the side wall bottom. The obtained change rules of axial force and the influence of axial force on aqueduct body stress can be referenced to aqueduct design.

• Periodical: Applied Mechanics and Materials (Volume 238)
• Pages: 329-332
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.238.329
• Online since: November 2012
• Authors: Xin Li Bai, Jiang Yan Li, Bing Ma
• Keywords: Aqueduct, Axial Stress, Crossbar, Height-Width Ratio, Water Depth

References

[1] X. Bai, at el: Research and application of key technologies of the construction of South-to- North water transfer project: research reports on dynamic tracking, temperature loads and dynamic analysis of large-scale aqueduct, North China University of Water Resources and Electric Power, Zhengzhou, (2007).

DOI: 10.17660/ejhs.2020/85.5.8

[2] J. Li, S. He, Influence of crossbars spacing on aqueduct body stress, J. of Water Conservancy & Hydropower Developments, 33 (2005) 34-36.

[3] B. Zhu, Principle and Application of Finite Element Method, China Water Conservancy and Hydropower Press, Beijing, (1998).

[4] R. Ji, Y. Chen, Research on static structure computational method of large rectangle aqueduct with multi-longitudinal beams, J. of Hydroelectric Power, 35 (2005) 80-84.

[5] G. Chao, T. Li, U-shaped thin-shell aqueduct stress analysis based on strain element with the assumption of noncompatible hardening, J. of China rural hydropower, 46 (2005) 50-53.

[6] Y. Zhao, X. Bai, Stress analysis of aqueduct support structure in Dong-Shen water supply reconstruction project, J. of Irrigation and Drainage Water, 21 (2002) 53-56.

[7] X. Bai, H. Huang, Finite element analysis on a continuous prestressed U-shaped thin-shell aqueduct, J. of North China Univ. of Water Conservancy and Electric Power, 22 (2001) 1-4.

[8] H. Zhu, D. Chen: Aqueduct, China Water Conservancy and Hydropower Press, Beijing, (2005).