高速铁路连续箱梁运营性能检定

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摘要 研究目的:梳理常用跨度连续箱梁运营性能的检定技术,为更好地开展高速铁路常用跨度连续箱梁运营性能检定工作提供技术指导。基于近年来在中国开展的高速铁路桥梁动力性能测试的数据和相关理论研究,对桥梁动力性能实测样本进行统计分析,分别给出250 km/h和350 km/h高速列车运营速度下预应力混凝土连续箱梁运营性能评价参数的建议通常值。
研究结论:(1)明确了3类高速铁路常用跨度连续箱梁运营性能检定的任务,提出了10项连续箱梁运营性能评定的主要技术参数;(2)梁体竖向自振频率取跨度的幂函数,梁体竖向阻尼比为0.5%～2.0%,挠跨比分别为1/5 500～1/3 500和1/6 000～1/4 000,梁端竖向转角分别为0.60‰rad和0.50‰rad,动力系数分别为1.17~1.26和1.20~1.30,跨中竖向和横向振幅分别为0.25～0.80 mm和0.10～0.15 mm,跨中竖向振动加速度为0.25～0.40 m/s²,墩顶横向振幅以墩全高与墩横向平均宽度之比在0.5～4.2范围内为条件选取,无砟轨道相邻梁端两侧的钢轨支点横向相对位移为0.5 mm;(3)本研究成果符合高速铁路桥梁实际状态,可为桥梁运营性能检定规范修订提供借鉴和参考。

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	王巍
	孟鑫
	王一干
	周政
	王冬猛

关键词 ：连续箱梁, 运营性能, 评定参数, 通常值, 高速铁路

Abstract：Research purposes: The verification technology of operation performance of continuous box beam with common span is sorted out, in order to provide technical guidance for better operation performance verification of continuous box beam with common span of high-speed railway. Based on the data of the dynamic performance test of high-speed railway bridges in China in recent years and the relevant theoretical research, the measured samples of bridge dynamic performance are statistically analyzed, and the recommended ordinary values of the operation performance evaluation parameters of prestressed concrete continuous box beams at the operating speeds of 250 km/h and 350 km/h are given.
Research conclusions:(1) The tasks of operation performance verification of three types of continuous box beam with common span of high-speed railway are defined, and 10 main technical parameters for operation performance evaluation of continuous box beam are put forward. (2)The vertical natural frequency is determined by the power function of span, the vertical damping ratio is 0.5% to 2.0%, the ratio of deflection to span is 1/5 500 to 1/3 500 and 1/6 000 to 1/4 000 respectively, the vertical rotation angle at beam end is 0.60‰rad and 0.50‰rad respectively, the dynamic factor is 1.17 to 1.26 and 1.20 to 1.30 respectively, the vertical and lateral amplitude at midspan of beam is 0.25 to 0.80 mm and 0.10 to 0.15 mm respectively, the vertical vibration acceleration at midspan of beam is 0.25 to 0.40 m/s², the lateral amplitude at pier top is chosen as the ratio of the height of pier and the lateral average width of the pier in the range of 0.5 to 4.2, the relative lateral displacement of rail support on both sides of adjacent beam end of ballastless track is 0.5 mm. (3) The research results are in line with the actual state of high-speed railway bridges, which can provide support for the revision of bridge operating performance verification specifications.

Key words： continuous box beam operation performance evaluation parameters ordinary value high speed railway

收稿日期: 2022-03-16

PACS:

U446.1

基金资助:中国国家铁路集团有限公司科技研究开发计划项目(P2021T013);中国铁道科学研究院集团有限公司科研项目(2020YJ087)

作者简介: ** 王巍,1987年出生,男,副研究员。

引用本文:

王巍, 孟鑫, 王一干, 周政, 王冬猛. 高速铁路连续箱梁运营性能检定[J]. 铁道工程学报, 2023, 40(1): 47-52.
WANG Wei, MENG Xin, WANG Yigan, ZHOU Zheng, WANG Dongmeng. Operation Performance Verification of Continuous Box Beam in High Speed Railway. Journal of Railway Engineering Society, 2023, 40(1): 47-52.

链接本文:

https://tdgcxb.crec.cn/CN/ 或 https://tdgcxb.crec.cn/CN/Y2023/V40/I1/47

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