摘要
针对传统连续梁施工中采用的挂篮主桁架存在自重过大、材料浪费问题,文章首先以常规挂篮设计为例进行受力分析,得出杆件受力基本参数及应力储备的利用情况;然后,以兰渝铁路施工中使用精轧螺纹钢替换组合型钢作为主桁架拉杆的实际工程为例,详细对比分析使用型钢和精轧螺纹钢在力学性能、经济性和施工便利性等方面的差异;最后,结合“弓弦”构件的受拉特性引申到其他新型抗拉材料,对碳纤维(CFRP)、芳纶纤维(AFRP)2种材料的优势和特点进行分析,并对其在挂篮主桁架拉杆及其他受力部件中的应用可行性展开探索。研究结果表明,新型材料在保证挂篮安全使用性能、降低施工成本方面具有显著成效,相关研究可为未来挂篮结构设计的优化升级提供理论与实践依据。
To solve the issues of excessive self-weight and material waste in the form traveler main trusses used in continuous beam construction,this article first conducts force analysis using conventional form traveler design as an example,deriving basic force parameters of members and the utilization of stress reserves.Then,taking the actual engineering case of using fine-rolled threaded steel bars to replace combined steel sections as the main truss tension members in the Lanzhou-Chongqing railway project,a detailed comparative analysis is conducted on the differences between using steel sections and fine-rolled threaded steel bars in terms of mechanical performance,economy,and construction convenience.Last but not least,extending from the tensile characteristics of"bow-string"components,the advantages and characteristics of lightweight tensile materials such as Carbon Fiber Reinforced Polymer(CFRP)and Aramid Fiber Reinforced Polymer(AFRP)are analyzed,and their application feasibility in form traveler main truss tension members and other forcebearing components is explored.The research results show that new materials have significant effects in ensuring the safe performance of form travelers and reducing construction costs.Related research could provide theoretical and practical bases for the optimization and upgrading of future form traveler structural design.
作者
赵利彦
胡金杰
ZHAO Liyan;HU Jinjie(Jiangsu CRRC Mechanical&Electric Technology Co.,Ltd.,Nantong Jiangsu 226000,China)
出处
《现代城市轨道交通》
2025年第12期22-28,共7页
Modern Urban Transit
关键词
兰渝铁路
连续梁施工
挂篮
主桁架设计
轻型材料
对比分析
Lanzhou-Chongqing railway
continuous beam construction
form traveler
main truss design
lightweight materials
comparative analysis
