X形配筋及钢骨增强混凝土异形柱边节点受力性能  

Mechanical behavior of exterior joints of specially shaped concrete columns reinforced by X-shaped reinforcement and steel

作　　者：李艳艳[1] 张超[2] 张健新[1] 李和庆[3] 

机构地区：[1]河北工业大学土木工程学院,天津300401 [2]河北农业大学城乡建设学院,保定071001 [3]中国石油天然气管道工程有限公司,廊坊065000

出　　处：《建筑结构》2016年第4期40-44,共5页Building Structure

基　　金：河北省自然科学基金资助项目(E2015202035);河北省建设科学技术研究计划(2014-123);河北省高等学校科学技术研究重点项目(ZD2010123)

摘　　要：对X形配筋增强、T形钢骨增强、槽形钢骨增强的混凝土异形柱边节点进行拟静力试验,研究混凝土异形柱边节点核心区的箍筋应变规律、混凝土应变规律、破坏特征及滞回曲线,分析X形配筋、T形钢骨、槽形钢骨对混凝土异形柱边节点受力性能的影响。结果表明:混凝土异形柱边节点核心区不同位置处箍筋应变相差比较大,边节点核心区中与剪力方向平行的腹板箍筋应变大于与剪力方向垂直的腹板箍筋应变和翼缘处的箍筋应变,在混凝土异形柱边节点核心区加入X形配筋、T形钢骨或槽形钢骨能够提高混凝土异形柱边节点核心区混凝土的主拉应变,改善异形柱边节点的破坏形态及滞回性能。The exterior joints of specially shaped concrete columns reinforced with X-shaped reinforcement,T-shaped steel and groove-shaped steel were tested under low cyclic loading. The stirrup strain variation,concrete strain variation,damage characteristic and hysteretic curve in the core area of exterior joints of specially shaped concrete columns were studied. The effect of X-shaped reinforcement,T-shaped steel and groove-shaped steel on mechanical behavior of exterior joints of specially shaped concrete columns were analyzed. The result shows that the stirrup strain in different position of the core area of exterior joints of specially shaped concrete columns reinforced varies widely. The stirrup strain in parallel to shear force in web of exterior joints is much higher than those in perpendicular to shear force in web and in the flange. The concrete tensile strain of exterior joints of specially shaped concrete columns reinforced by X-shaped reinforcement,T-shaped steel and groove-shaped steel is enhanced,the damage characteristic and hysteretic characteristic are improved.

关 键 词：异形柱 边节点 受力性能 X形配筋 钢骨 

分 类 号：TU398.9[建筑科学—结构工程]