RPC钢筋网加固足尺RC柱偏压性能试验  

Experimental Study on Eccentric Compressive Behavior of Full-size RC Columns Strengthened by Thin Layer of RPC Reinforced Mesh

作　　者：卜良桃[1] 朱天宇 贺洪霞 BU Liangtao;ZHU Tianyu;HE Hongxia(College of Civil Engineering,Hu′nan University,Changsha,China,410082;The Fourth Construction Engineering Co.Ltd.,China Construction Second Engineering Bureall,Tianjin,China,300457)

机构地区：[1]湖南大学土木工程学院,湖南长沙410082 [2]中建二局第四建筑工程有限公司,天津300457

出　　处：《沈阳建筑大学学报（自然科学版）》2022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(52078205)。

摘　　要：目的 研究使用活性粉末混凝土钢筋网薄层加固(RPCRM)的钢筋混凝土足尺偏压柱的受力性能。方法 对6根RPCRM柱进行二次受力偏压试验,分析加固层钢筋网配筋率及初始荷载水平对柱承载和变形能力的影响。结果 与未加固柱相比,RPCRM柱承载力和变形能力均有不同程度的提高,峰值荷载的最大提高幅度为233%,位移延性系数的最大提高幅度为155%,且提高幅度皆与钢筋网配筋率及初始荷载水平相关。基于试验结果和理论分析,建立了RPCRM柱承载力计算公式。结论 活性粉末混凝土钢筋网加固钢筋混凝土偏压柱的加固效果显著,加固后能有效提高柱的承载力、刚度和延性。RPCRM柱承载力公式的计算值与试验值吻合较好,可应用于实际工程。In order to study the mechanical performance of full-size RC eccentric compressive columns strengthened by reactive powder concrete reinforced mesh(RPCRM),6 RPCRM columns under twice eccentric loading were tested.The eccentric pressure test analyzes the influence of the reinforcement ratio of reinforced mesh and the initial load on the load-bearing capacity and deformation capacity of columns.The results show that the load-bearing capacity and deformation capacity of the RPCRM columns have been improved to varying degrees compared with unreinforced columns.The peak load is increased by 233%.The displacement ductility coefficient is increased by 156%.The increases are related to the reinforcement ratio and the initial load.Based on the test results and theoretical analysis,a calculation formula for the bearing capacity of the RPCRM column is established.The reinforcement effect of reinforced concrete eccentric column strengthened by reactive powder concrete reinforcement mesh is remarkable.The bearing capacity,stiffness and ductility of the column can be effectively improved after reinforcement.The calculation value of the RPCRM column bearing capacity formula is consistent with its experimental value.The bearing capacity formula of the RPCRM column can be applied to engineering practice.

关 键 词：活性粉末混凝土 钢筋网 二次受力加固 偏压柱 承载力计算 延性 

分 类 号：TU375[建筑科学—结构工程]