摘要
针对现有钢结构真空管道梁造价高、运输条件受限且安装不便等问题,本文探讨了一种适用于未来长距离运输和车辆条件的组合材料管道梁结构,开展了三种常用跨度管道梁结构的试设计,分析了一联多跨方案对结构刚度和变形的影响。获得研究成果:①分层设计方案可充分发挥结构各自特点,降低施工和运输难度;②通过试设计获得了常用跨度管道梁的关键参数取值,并以某试验线为例,分析了合理跨度选取的各项因素,获得最优经济跨度;③一联多跨方案比选表明联长和跨数的增加可有效提高结构的横、竖向刚度,减小活载变形,对于提升结构运营性能、减少养护工作量有直接作用,但是随着联长的逐渐增加,结构的刚度提升效果将逐渐保持不变;④联长的增加会显著加大纵向温度变形,对轨道结构受力影响较大。研究成果可为真空磁浮高架桥梁的设计提供参考。
Three types of widely used span pipe-beam,made of composite materials,including concrete/steel/glass and for evacuated maglev transportation,were designed.The stiffness and deformation of the self-designed "one-link multi-span" pipe-beam section,comprising pre-constructed upper/lower halves,were mathematically modeled and theoretically analyzed.The influence of the span-length on the longitudinal/vertical rigidity and displacement,thermal-deformation and intrinsic vibration frequency of pipe-beam section was investigated for design optimization.The results show that depending on the span-length,the one-link multi-span is a highly promising scheme.Specifically,as the span-length and span-number increased,the longitudinal/vertical rigidity and longitudinal thermal-deformation increased,resulting in a negative impact on the rail structure;and the dynamic deformation and maintenance cost decreased.The tested and calculated results were in good agreement.We suggest that the self-designed composite pipe-beam be of some technological interest in development of evacuated maglev transportation.
作者
杨国静
颜永逸
宋晓东
YANG Guojing;YAN Yongyi;SONG Xiaodong(China Railway Eryuan Engineering Group Co.,Ltd.,Chengdu 610031,China)
出处
《真空科学与技术学报》
CAS
CSCD
北大核心
2021年第2期145-151,共7页
Chinese Journal of Vacuum Science and Technology
基金
中国中铁股份公司重大专项研发计划项目(2018-专项-02)。
关键词
真空高速磁浮
管道
组合材料
高架桥
结构设计
Evacuated high-speed maglev
Pipe
Composite material
Viaduct
Structural design
作者简介
联系人:杨国静,Tel:(028)68937122,E-mail:445380616@qq.com。
