Local Optimization Analysis of Bailey Beam Bracket Based on Multiscale Model

Abstract:

In the construction of high-speed railway bridge, the stress of Bailey beam is much higher than that of other parts due to the large local compressive stress and bending moment at the fulcrum. To solve this problem, this paper proposes a structural measure of adding double I-steel cushion between Bailey beam and top beam to alleviate the larger stress at the fulcrum and make the support more uniform. Based on the Bailey beam support system of cast-in-situ high-speed railway bridge of Lianshui County super large bridge, the multi-scale finite element model of Bailey beam support is established by ABAQUS general finite element software, and the influence law of structural parameters of double-jointed I-steel cushion on support stress is analyzed. The research shows that the rigidly of the double-jointed I-beam cushion should not be too large or too small. When the length is appropriate, it can effectively alleviate the problem of excessive stress at the fulcrum of Bailey beam, and is a safe, economical and simple new structural measure.

• Periodical: Key Engineering Materials (Volume 815)
• Pages: 229-234
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.815.229
• Online since: August 2019
• Authors: Qin Tian*, Cheng Hao Hang, Zi Xin Wan, Yun Peng Zou
• Keywords: Bailey Beam Support, High-Speed Railway Bridges, Local Optimization, Multi-Scale Model

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