玄武岩纤维复合材料被动网立柱抗弯性能研究  

A Study on Bending Resistance of Passive Mesh Posts Made of Basalt Fiber Composite Material

作　　者：任华锋[1] REN Huafeng(China Railway Eryuan Engineering Group Co.,Ltd.,Chengdu 610031,China)

机构地区：[1]中铁二院工程集团有限责任公司,成都610031

出　　处：《高速铁路技术》2023年第2期24-27,32,共5页High Speed Railway Technology

摘　　要：西南山区铁路沿线地形地貌极为复杂,高位崩塌落石异常发育,被动网、帘式网等防护系统应用广泛,传统的钢立柱防护网普遍存在立柱抗弯能力弱、质量重、施工难度大等缺点。针对上述技术难题,本文通过分析玄武岩纤维复合材料的最佳配合比,采用理论计算、三维有限元数值模拟及室内试验等手段,对比研究了传统钢立柱和玄武岩纤维复合材料立柱的抗弯刚度及重量。研究表明,复合材料基体材料体积分量应控制在25%~35%之间,立柱建议采用中空圆形结构,当圆截面外径为φ167、内径为φ141时,其抗弯刚度比传统的工字钢柱(18号)提高8倍以上,重量比传统工字钢柱减轻约50%。The topographical and geomorphological conditions along the railway in the mountainous area in southwest China are extremely complex,the high-place collapse and rockfall are abnormally developed,and the passive mesh,curtain mesh,and other protection systems are widely used,while the traditional protective mesh with steel posts cannot deal with these conditions due to insufficient bending resistance,large mass,and great construction difficulty.In view of the above technical difficulties,the bending stiffness and weight of traditional steel posts and basalt fiber composite posts were compared and studied by analyzing the optimal mix ratio of basalt fiber composite material,using theoretical calculation,three-dimensional finite element numerical simulation,and laboratory tests.The results show that the volume component of the composite matrix material shall be controlled between 25%and 35%,and it is recommended to adopt a hollow circular structure for the post.When the outer diameter of the circular section isφ167 and the inner diameter isφ141,its bending rigidity is"more than 8 times"higher than that of the traditional I-steel column(No.18),and its weight is about 50%less than that of the traditional I-steel post.

关 键 词：危岩落石 被动网 立柱 玄武岩纤维复合材料 材料配合比 

分 类 号：U417.1[交通运输工程—道路与铁道工程]