东南大学学报（自然科学版）2024，Vol.54Issue(4)：799-806,8.DOI:10.3969/j.issn.1001-0505.2024.04.001
既有高速铁路简支梁桥提速适应性研究与技术发展展望
Study on speed-up adaptability and prospects for technological development of simply supported beam bridge of existing high-speed railway
摘要
Abstract
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.关键词
高速铁路/简支梁/更高速度/提速/适应性评估Key words
high-speed railway/simply supported beam/higher speed/speed up/adaptability assessment分类
交通工程引用本文复制引用
蔡超勋,卢春房,李克冰..既有高速铁路简支梁桥提速适应性研究与技术发展展望[J].东南大学学报（自然科学版）,2024,54(4):799-806,8.基金项目
国家重点研发计划资助项目(2022YFB2603400)、中国国家铁路集团有限公司科技研究开发计划资助项目(P2021G053)、中国铁道科学研究院集团有限公司科研资助项目(2022YJ175). （2022YFB2603400）
