高强PC钢棒约束箍筋混凝土柱受力性能试验  

Mechanical behavior of concrete columns confined by steel bar for prestressed concrete spiral hoops

作　　者：王英[1] 张振[1] 郑文忠[1] 朱爱萍[2] 赵基达[2] 

机构地区：[1]哈尔滨工业大学土木工程学院,哈尔滨150090 [2]中国建筑科学研究院,北京100013

出　　处：《哈尔滨工业大学学报》2013年第4期6-13,共8页Journal of Harbin Institute of Technology

基　　金：国家科技支撑计划子课题(2008BAE61B03-03);国家教育部长江学者奖励计划资助(2009-37);哈尔滨工业大学"985工程"优秀科技创新团队建设项目(2011)

摘　　要：为考察高强约束箍筋对混凝土柱受力性能的有利影响,开展了24根PC钢棒螺旋箍筋柱和4根HPB235螺旋箍筋柱的轴压试验.试验结果表明:PC钢棒螺旋箍筋在轴压柱承载能力极限状态下的拉应力随混凝土强度、螺旋箍筋密度的增大而提高.结合本次试验数据,提出了轴压柱达到承载能力极限状态时螺旋箍筋拉应变与约束程度的关系式,进而提出PC钢棒螺旋箍筋轴压柱承载力计算公式.To explore the method of spiral hoops made of steel bar for prestressed concrete and study the mechanism and failure process of concrete column confined by high-strength spiral hoops, the axial compression test of 24 concrete columns confined by steel bar for prestressed concrete spiral hoops and 4 concrete columns confined by steel rebar are carried out. The results show that the ultimate tensile stress of prestressed concrete spiral hoops can be increased with the concrete strength and the ratio of hoop. Based on the results of test, when the columns under axial compression reach the ultimate bearing capacity, the relationship between the tensile strain of spiral hoops and the degree of constraint is suggested, and the calculation formulas are put forward.

关 键 词：PC钢棒 螺旋箍筋 约束混凝土 极限应力 峰值应变 

分 类 号：TU375[建筑科学—结构工程]