铁路连续组合钢箱梁桥振动与噪声试验研究

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摘要 研究目的：为研究钢-混凝土连续组合梁桥在铁路重载作用下桥梁的振动与噪声响应,以某客运专线一座跨度为（40+50+40）m的铁路钢-混凝土连续组合梁桥为工程背景,开展了结构振动与噪声现场实测试验。本试验共记录到了16辆不同编组列车通行工况下的有效数据,列车通行速度在160~210 km/h范围内。以此为基础,本文分析探讨了铁路组合梁桥结构振动与噪声的特性,以期为铁路组合结构桥梁的声振响应研究与工程应用提供数据参考。
研究结论：（1）本研究涉及的组合结构桥梁车致振动的优势频率范围为30~2 000 Hz,结构竖向振动峰值频率出现在100 Hz,横向振动峰值频率出现在63 Hz;（2）近轨30 m范围内场点A计权噪声声压级的优势频率范围为63~1 250 Hz;（3）钢腹板局部振动响应突出,加速度有效值可达6~10 m/s²,显著高于结构的竖向及横向振动;（4）铁路边界场点噪声声压级可达75~78 dB(A);（5）本研究成果可为铁路钢混组合梁桥工程及研究提供实测数据支撑。

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	顾奕伟
	文望青
	聂鑫
	曾甲华
	姜越鑫

关键词 ：高速铁路, 钢-混凝土组合梁, 动力性能, 结构噪声, 试验研究

Abstract：Research purposes: To study the vibration and noise response of steel-concrete continuous composite beam bridges under railway heavy loads, a railway steel-concrete continuous composite beam bridge with a span of (40+50+40) m on a certain passenger dedicated line was used as the engineering background to conduct on-site testing of structural vibration and noise. The valid data for 16 trains of different formations under operating conditions has been recorded, with train speeds ranging from 160 to 210 km/h. Based on the valid data, the characteristics of vibration and noise of railway composite beam bridges were analyzed and discussed. This research can provide data reference for the research and engineering application of acoustic and vibration response of railway composite structure bridges.
Research conclusions: (1)The results showed that the dominant frequency range of vehicle-induced vibration of the composite bridge was 30 to 2 000 Hz, the peak frequency of vertical vibration of the bridge appeared at 100 Hz, and the peak frequency of transverse vibration of the bridge appeared at 63 Hz. (2) The dominant frequency range of A-weighted sound pressure level at each field point in the test was 63 to 1 250 Hz. (3) The local vibration response of the steel web in the steel-concrete composite bridge was prominent, and the acceleration effective value can reach 6 to 10 m/s², significantly higher than the vertical and transverse vibration of the bridge. (4) The noise pressure level of the railway boundary field point can reach 75 to 78 dB(A). (5) The research results can provide measured data support for railway steel-concrete composite beam bridge engineering and research.

Key words： high-speed railway steel-concrete composite girder dynamic behavior structure-borne noise test study

收稿日期: 2023-06-25

PACS:

基金资助:中国国家铁路集团有限公司科技研究计划重大课题（K2019G004）; 中国国家铁路集团有限公司科技研究计划重大课题（K2018G017）

作者简介: ** 顾奕伟,1995年出生,男,工程师。

引用本文:

顾奕伟, 文望青, 聂鑫, 曾甲华, 姜越鑫. 铁路连续组合钢箱梁桥振动与噪声试验研究[J]. 铁道工程学报, 2024, 41(11): 42-46.
GU Yiwei, WEN Wangqing, NIE Xin, ZENG Jiahua, JIANG Yuexin. Experimental Study on Vibration and Noise of Continuous Composite Box Girder of Railway Bridge. Journal of Railway Engineering Society, 2024, 41(11): 42-46.

链接本文:

https://tdgcxb.crec.cn/CN/ 或 https://tdgcxb.crec.cn/CN/Y2024/V41/I11/42

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