Study on speed-up adaptability and prospects for technological development of simply supported beam bridge of existing high-speed railway
To explore the feasibility of speed-up operation of existing high-speed railway simply supported beam bridge,and clarify the development direction of simply supported beam technology,the technical devel-opment process of high-speed railway simply supported beam bridge in China is summarized.Through com-parative analysis of load effect,simulation calculation and field test,the evaluation method and steps of speed-up adaptability of existing 350 km/h high-speed railway simply supported beam bridge are studied.The results show that the vertical load effect does not exceed the design value when 400 km/h train runs on the existing 350 km/h high-speed railway simply supported beam bridge under actual conditions,and the structure is safe.The operation performance indexes of the existing simply supported beam bridge of 350 km/h high-speed rail-way under the condition of speed increase obtained by simulation calculation and field test meet the require-ments of the specification,and the existing simply supported beam bridge can adapt to the operation condition of 400 km/h.The proposed speed-up adaptability evaluation method and technical development focus of the existing high-speed railway simply supported beam bridge can provide reference for relevant engineering prac-tice and scientific research planning.
国家科技期刊平台
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