内置CFRP管的钢管再生混凝土短柱轴压性能研究  

Experimental Study on Axial Compression Behavior of Recycled Concrete Filled Steel Tubular Short Columns with CFRP Tubes

作　　者：许伟[1] 李亚静 张海霞[1] XU Wei;LI Yajing;ZHANG Haixia(School of Civil Engineering,Shenyang Jianzhu University,Shenyang,China,110168)

机构地区：[1]沈阳建筑大学土木工程学院,辽宁沈阳110168

出　　处：《沈阳建筑大学学报（自然科学版）》2024年第5期830-838,共9页Journal of Shenyang Jianzhu University：Natural Science

基　　金：国家自然科学基金项目(52278196)。

摘　　要：目的研究不同截面形式下,内置CFRP管的钢管再生混凝土短柱力学性能。方法利用有限元软件建立试件模型,验证模型的正确性,在此基础上,建立组合短柱模型,分析CFRP层数、钢管厚度、再生骨料取代率对不同截面形式下组合柱力学性能的影响。结果增加CFRP层数和钢管厚度可以提高组合短柱的极限承载力和位移延性系数;改变再生骨料取代率,对组合短柱力学性能的影响较小;改变截面形式,圆截面短柱的力学性能优于方截面短柱。结论在工程设计中,使用该组合短柱时建议组合柱内置两层CFRP,截面形式建议优先考虑圆截面;若需提高组合柱承载力,建议采用增加钢管厚度的方式。The work aims to study the mechanical properties of recycled concrete filled steel tubular short columns with built-in CFRP tubes under different cross-section forms.The finite element software was used to establish the specimen model to verify the correctness of the model.On this basis,the composite short column model was established to analyze the effects of CFRP layer number,steel tube thickness and recycled aggregate replacement rate on the mechanical properties of composite columns under different cross-section forms.The results show that increasing the number of CFRP layers and the thickness of steel tube can improve the ultimate bearing capacity and displacement ductility coefficient of composite short columns.Changing the replacement rate of recycled aggregate has little effect on the mechanical properties of composite short columns.By changing the section form,the mechanical properties of circular section short columns are better than those of square section short columns.In engineering design,it is suggested that two layers of CFRP should be built in the composite column when using the composite short column,and the circular section should be given priority to in the section form.If it is necessary to improve the bearing capacity of the composite column,it is recommended to increase the thickness of the steel tube.

关 键 词：外截面形式 CFRP层数 钢管厚度 再生骨料取代率 

分 类 号：TU398[建筑科学—结构工程]