高速铁路32 m掺碎石活性粉末超高性能混凝土箱梁优化设计研究  

Optimization Design Study of a 32 m Gravel-Incorporated Reactive Powder Concrete Box Girder for High-Speed Railways

作　　者：张清阳 ZHANG Qingyang(China Railway 14th Bureau Group Fangqiao Co.,Ltd.,Beijing 102412,China)

机构地区：[1]中铁十四局集团房桥有限公司,北京102412

出　　处：《国防交通工程与技术》2025年第1期75-80,共6页Traffic Engineering and Technology for National Defence

基　　金：中铁十四局集团公司科研课题(913700001630559891202320)。

摘　　要：基于掺碎石活性粉末混凝土(RPC)材料优异的材料性能,开展高速铁路32 m预应力活性粉末混凝土箱梁优化设计分析。考虑掺碎石RPC材料的抗压和抗拉性能,建立32 m预应力活性粉末混凝土箱梁分析模型,基于高速铁路相关规范和设计原则开展优化分析。在满足结构受力情况下,RPC材料的优良材料性能可在高速铁路32 m箱梁结构中得到充分发挥,从而减小箱梁截面;相比于C50预应力混凝土箱梁,梁体自重可降低12.39%,可显著减少材料应用。优化后的RPC箱梁结构承载力、运营阶段受力性能、刚度和锚固区检算分析,相关指标均满足相关规范要求。有助于推进掺碎石RPC材料在高速铁路箱梁中的应用。To utilize the superior material properties of reactive powder concrete(RPC)incorporating gravel,this study conducts an optimization design analysis of a 32 m prestressed RPC box girder for high-speed railways.Accounting for both the compressive and tensile characteristics of gravel-incorporated RPC,a finite element model of the 32 m prestressed RPC box girder was established.The optimization proceeded in accordance with relevant high-speed railway standards and design principles.The results show that,when structural performance requirements are satisfied,the excellent mechanical properties of RPC can be fully exploited to reduce the girder's cross-sectional dimensions.Compared with a conventional C50 prestressed concrete box girder,the self-weight of the RPC girder is reduced by 12.39%,significantly lowering material usage.Furthermore,the optimized RPC box girder satisfies the requirements of current codes in terms of bearing capacity,in-service structural performance,stiffness,and anchorage-zone verification,demonstrating its feasibility and efficiency in high-speed railway applications.Research helps promote the application of RPC materials mixed with gravel in high-speed railway box girders.

关 键 词：高速铁路 掺碎石活性粉末混凝土 预应力混凝土梁 优化设计 

分 类 号：U448.33[建筑科学—桥梁与隧道工程]