摘要
六边形管廊具有变形受力性能较好、空间利用率高于圆形隧道的优势,然而其在不同类型拼装形式情况下的性能对比及相应的设计参数仍缺乏研究。针对六边形管廊结构,根据相似理论对错缝拼装、通缝拼装以及完整环模型进行了模型加载试验,得到了不同拼装模式下的横向刚度有效率,并利用数值模型进行对比验证。在此基础上,采用数值模型进一步研究了3种拼装模式的弯矩分布规律,并计算出错缝拼装的弯矩传递系数。结果表明:六边形管廊结构错缝拼装以及通缝拼装的横向刚度有效率分别在0.85~0.89和0.62~0.68之间,错缝拼装时的横向刚度显著优于通缝拼装;错缝拼装结构弯矩分布与弯矩传递系数均呈周期性变化,弯矩传递系数在0.18~0.36之间。所得成果可在六边形管廊结构设计中作为取值参考。
The hexagonal tunnel has the advantages of better deformation and mechanical performance,and the space utilization ratio is better than that of the circular tunnel.But it's still a lack of research on the performance comparison and corresponding design parameters under different types of assembly forms.In order to explorer the performances of the transverse effective rigidity ratio of the hexagonal tunnel,stagger-jointed,straight-jointed and uniform models are investigated based on model tests and similarity theories.The experiment results are verified by numerical simulation.On this basis,numerical models are used to further study the bending moment distribution of the three models,and the bending moment transferring coefficient of stagger-jointed structure is calculated.The results show that:The transverse effective rigidity ratio is between 0.85 and 0.89 under stagger-jointed condition,and significantly better than that between 0.62 and 0.68 under straight-jointed condition.The bending moment distribution and bending moment transferring coefficient of staggered joint structure change periodically.The bending moment transferring coefficient is between 0.18 and 0.36.The results can be used as a reference for the design of hexagonal tunnel.
作者
张洪威
程雪松
郭琳
Zhang Hongwei;Cheng Xuesong;Guo Lin(China Railway Shanghai Design Institute Group Co.,Ltd.,Tianjin Branch,Tianjin 300073,P.R.China;School of Civil Engineering,Tianjin University,Tianjin 300072,P.R.China)
出处
《地下空间与工程学报》
北大核心
2025年第5期1729-1739,共11页
Chinese Journal of Underground Space and Engineering
基金
中国铁建股份有限公司科研课题(17-C44)。
关键词
六边形管廊
线加载试验
刚度有效率
弯矩传递系数
hexagonal tunnel
line loading test
stiffness efficiency
bending moment transferring coefficient
