型钢混凝土十形截面柱-梁平面与空间节点滞回性能试验研究

发布时间：2018-01-14 02:20

本文关键词：型钢混凝土十形截面柱-梁平面与空间节点滞回性能试验研究　出处：《建筑结构学报》2014年08期 　论文类型：期刊论文

【摘要】：为了研究型钢混凝土十形截面柱-梁框架节点在平面受力与空间受力状态下受低周循环荷载作用的滞回性能,以柱截面配钢形式和水平加载角度为变化参数,进行了4个平面和3个空间十形截面柱-梁节点的低周反复加载试验。比较研究了两类节点在破坏形态、滞回曲线、承载能力、耗能能力及变形延性等抗震性能指标上的差异。研究结果表明:型钢混凝土十形截面柱平面节点主要发生核心区混凝土的剪切斜压破坏,垂直于加载方向左右两侧的柱肢对斜裂缝的发展有一定的抑制作用,而空间节点则发生核心区混凝土剪切斜压伴随黏结裂缝的破坏模式;与平面节点相比,空间节点的滞回环饱满,延性和耗能能力更大,但其承载力有所下降。基于试验与理论分析结果建立型钢混凝土十形截面柱-梁平面与空间节点的受剪承载力计算式,其计算结果与试验结果吻合较好。
[Abstract]:In order to study the hysteretic behavior of steel reinforced concrete (SRC) column-beam frame joints subjected to low-cycle cyclic loads under plane and spatial loads, the column cross-section steel distribution and horizontal loading angle are taken as the variable parameters. The low cycle repeated loading tests of 4 plane and 3 space column beam joints are carried out, and the failure patterns, hysteretic curves and load-carrying capacity of the two types of joints are compared and studied. The research results show that the shear baroclinic failure of the concrete in the core region is mainly occurred in the plane joints of steel reinforced concrete (SRC) columns with ten sections. The columns perpendicular to the direction of loading can restrain the development of oblique cracks, while the failure mode of concrete shear baroclinic coupled with bond cracks occurs in the space joints. Compared with planar nodes, the hysteretic loop of spatial nodes is full, ductile and energy-consuming. Based on the experimental and theoretical results, a formula for calculating the shear bearing capacity of the plane and space joints of steel reinforced concrete (SRC) columns and beams is established, and the calculated results are in good agreement with the experimental results.
【作者单位】：广西大学土木建筑工程学院;广西大学工程防灾与结构安全教育部重点实验室;
【基金】：国家自然科学基金项目(50908057,51268004) “八桂学者”建设工程专项经费资助项目广西防灾减灾与工程安全重点实验室开放课题项目(2012ZDX10) 广西研究生教育创新计划项目(YCBZ2012005)
【分类号】：TU398.9
【正文快照】： 0引言异形柱结构符合现代建筑发展方向[1-6],其中型钢混凝土(SRC)异形柱由于截面内配置型钢,具有承载能力高、抗震性能好的特点,适合在高层建筑及抗震设防高烈度区推广应用[7-8]。SRC异形柱截面“细长”,其框架节点配置的型钢与钢筋较多,致使核心区配筋十分拥挤,作为传力的关

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