城市建设与规划

混凝土U型槽隔振屏障对振动波传播的影响研究

孙海宽 (石家庄正太建设发展有限公司;石家庄市建筑设计院有限责任公司), 沙晓东 (石家庄正太建设发展有限公司;石家庄市建筑设计院有限责任公司), 崔民晓 (石家庄正太建设发展有限公司;石家庄市建筑设计院有限责任公司), 张明宪 (石家庄正太建设发展有限公司;石家庄市建筑设计院有限责任公司), 张扬 (石家庄正太建设发展有限公司;石家庄市建筑设计院有限责任公司)

摘要


为研究混凝土U型槽对地基振动传播的隔离效果，文中建立二维有限元数值模型，以频响函数FRF作为评价指标，分析不同填充材料、槽宽和槽深对U型槽隔振性能的影响。通过对比有、无屏障条件下的响应幅值来评价U型槽的隔振效果。结果表明，混凝土U型槽能够有效削弱地基中高频段振动传播，尤其是频率增大至30Hz后，FRF明显降低，隔振效果显著增强；不同填充材料下FRF曲线整体变化趋势相近；槽宽和槽深对隔振效果的影响具有频率选择性，适当的几何尺寸有利于提高主要频段内的振动衰减效果，但过大槽宽或过深槽体并不能有效改善隔振性能。研究结果可为铁路路基及邻近建筑振动控制中沟槽类隔振结构的设计与优化提供参考。

关键词


混凝土U型槽；隔振性能；频率响应；地基振动

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参考


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DOI: https://doi.org/10.33142/ucp.v3i2.19989

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