首页|基于弹性地基叠合梁模型的混凝土预制构件生产线轨道变形规律研究

基于弹性地基叠合梁模型的混凝土预制构件生产线轨道变形规律研究

Study on deformation laws of track in precast concrete production line based on elastic foundation beam model

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研究了预制构件生产线轨道布置的安全性问题,特别是CRTS Ⅱ型无砟轨道在预制构件荷载作用下的变形.通过弹性地基叠合梁解析法和有限元模拟,分析了不同荷载条件对轨道位移分布的影响规律.结果表明:构件荷载在特征长度范围内对轨道端部位移影响显著,随着荷载向梁内移动,位移逐渐减小并趋于稳定.研究还发现,地基土层条件和轨道刚度是影响轨道变形的主要因素,轨道变形位移量与地基压缩模量和混凝土结构层抗弯刚度呈负相关关系.
It investigates the safety concerns regarding track layout in the prefabricated component production line,particularly the deformation of the CRTS Ⅱ ballastless track subjected to the load of prefabricated components.Through the analytical approach of the elastic foundation composite beam and finite element simulation,the influence rules of various load conditions on the track displacement distribution are examined.The outcomes reveal that the component load exerts a considerable influence on the displacement at the end of the track within the characteristic length range.As the load shifts towards the interior of the beam,the displacement gradually reduces and tends to stabilize.It further discovers that the conditions of the foundation soil layer and the track stiffness are the primary factors influencing the track deformation.The magnitude of the track deformation displacement is inversely correlated with the compressive modulus of the foundation and the flexural stiffness of the concrete structure layer.

composite beam on elastic foundationnumerical simulationfoundation settlementproduction line

陈文尹、吴灿、吴庆发、祝平华、韩旭超、刘坤、杨旭

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中铁四局集团有限公司,安徽 合肥 230000

中铁四局集团第五工程分公司,江西九江 332000

广西柳梧铁路有限公司,广西南宁 530000

哈尔滨工业大学土木工程学院,黑龙江哈尔滨 150090

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弹性地基叠合梁 数值模拟 地基沉降 生产线

2024

混凝土
中国建筑东北设计研究院有限公司

混凝土

CSTPCD北大核心
影响因子:0.844
ISSN:1002-3550
年,卷(期):2024.(12)