X形配筋及钢骨增强混凝土异形柱边节点受力性能*
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（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）
［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。［关键词］异形柱; 边节点; 受力性能; X形配筋; 钢骨中图分类号：TU398+.9 文献标识码：A 文章编号：1002-848X(2016)04-0040-05
Mechanical behavior of exterior joints of specially shaped concrete columns reinforced by X-shaped reinforcement and steelLi Yanyan1, Zhang Chao2, Zhang Jianxin1, Li Heqing3(1 School of Civil Engineering, Hebei University of Technology, Tianjin 300401, China; 2 Institute of Urban and Rural Construction, Agricultural University of Hebei, Baoding 071001, China; 3 China Petroleum Pipeline Engineering Corporation, Langfang 065000, China)Abstract: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.Keywords:specially shaped column; exterior joint; mechanical behavior; X-shaped reinforcement; steel
*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）。作者简介：李艳艳，博士，副教授，硕士生导师，Email：nicole_820@163.com。
