不锈钢管-钢骨超高性能混凝土复合柱力学性能研究  

Research on Mechanical Properties of Stainless Steel Tubes-Steel Reinforcement Ultra-high Performance Concrete Composite Columns

作　　者：白涵驹 BAI Hanju(The Third Engineering Co.,Ltd.of China Railway 18th Bureau Group,Heze,Shandong 274000,China)

机构地区：[1]中铁十八局集团第三工程有限公司,山东菏泽274000

出　　处：《施工技术(中英文)》2025年第5期132-137,共6页Construction Technology

基　　金：中铁十八局集团有限公司科研创新项目。

摘　　要：通过混凝土柱轴压试验,对方形不锈钢管-钢骨超高性能混凝土柱轴压力学性能进行研究。采用高精度电液伺服加载试验机对混凝土柱进行轴向偏压加载,加载前预估混凝土柱极限承载力,然后开启预加载试验,预加荷载不超过极限荷载的80%。正式加载过程中,采用分级加载方式,每级加载约为预估极限荷载的6%,每级加载持续时间2.5min。当施加荷载达到预估极限荷载78%后,每级荷载减半加载,直至混凝土柱承载力降至预估极限荷载的80%或混凝土发生破坏时,停止加载。分析不同参数下混凝土柱的荷载-轴向位移变化及荷载-跨中侧向挠度变化,得到该超高性能混凝土复合柱力学性能参数。Through the axial compression test of concrete columns,the axial compression mechanical properties of square stainless steel-steel reinforced ultra-high performance concrete columns were studied.A high-precision electro-hydraulic servo loading testing machine was used to apply axial eccentric compression to the concrete columns.Before loading,the ultimate bearing capacity of the concrete columns was estimated,and then the preloading test was started.The preloading was not more than 80%of the ultimate load.During the formal loading process,a step-by-step loading method was adopted,with each step loading approximately 6%of the estimated ultimate bearing capacity,and each step loading lasted for 2.5 minutes.When the applied load reached 78%of the estimated ultimate load,the loading was halved for each step until the bearing capacity of the concrete column dropped to 80%of the estimated ultimate load or the concrete was damaged,and then the loading was stopped.The load-axial displacement changes and the load-mid-span lateral deflection changes of the concrete columns under different parameters were analyzed,to obtain the mechanical performance parameters of this ultra-high performance concrete composite column.

关 键 词：超高性能混凝土 轴压试验 位移 挠度 荷载 

分 类 号：TU398[建筑科学—结构工程]