方钢管内约束活性粉末混凝土短柱轴压力学性能研究  

EXPERIMENTAL RESEARCH ON MECHANICAL PROPERTIES OF REACTIVE POWDER CONCRETE SHORT COLUMNS CONFINED BY SQUARE STEEL TUBE UNDER AXIAL COMPRESSION

作　　者：郝文秀[1] 于万里 张思源 徐晓[1] 宋珊珊 HAO Wenxiu;YU Wanli;ZHANG Siyuan;XU Xiao;SONG Shanshan(Urban and Rural Construction Institute,Hebei Agricultural University,Baoding 071001,China)

机构地区：[1]河北农业大学城乡建设学院,河北保定071001

出　　处：《工业建筑》2021年第6期117-122,共6页Industrial Construction

基　　金：河北省高等学校科学技术研究项目(ZD2018209);河北省重点研究开发项目(18227209D)。

摘　　要：通过9根方钢管内约束(混凝土掺加钢纤维、内置螺旋箍筋)活性粉末混凝土短柱轴压试验,研究了钢纤维掺量、螺旋箍筋间距对柱的破坏形态、承载力及延性的影响。试验表明:通过掺加钢纤维、内置螺旋箍筋的方式可以极大地提高试件的变形能力,极限承载力增幅范围可至10%~25%。在试验的基础上,建立了ABAQUS有限元分析模型,进一步分析了边厚比、箍筋间距对柱承载力、延性性能的影响,理论分析结果可为工程实践提供理论支持。Based on the axial compression test of 9 reactive powder concrete(RPC)short columns confined by square steel tubes(the concrete mixed with steel fibers and built-in spiral stirrups),the effects of steel fiber content and spiral stirrup spacing on the failure mode,bearing capacity and ductility of columns were studied.The test results showed that the deformation capacity of the specimen could be greatly improved by adding steel fibers and embedding spiral stirrups,and the increase range of ultimate bearing capacity could be up to 10%~25%.Based on the experiment,the ABAQUS finite element analysis model was established to further analyze the influence of length-thickness ratio and stirrup spacing on the bearing capacity and ductility of columns,the results of theoretical analysis could provide theoretical support for engineering practice.

关 键 词：方钢管 活性粉末混凝土 轴压 螺旋箍筋 延性 

分 类 号：TU398.9[建筑科学—结构工程]