核心区剪切破坏的RC变梁中节点受力模型研究  

Model for shear failure of RC interior joints with different depth beams

作　　者：潘元[1] 刘伯权[1] 邢国华[1] 吴涛[1] 

机构地区：[1]长安大学建筑工程学院,陕西西安710061

出　　处：《西安建筑科技大学学报（自然科学版）》2010年第5期642-648,共7页Journal of Xi'an University of Architecture & Technology(Natural Science Edition)

基　　金：国家自然科学基金资助项目(50608004);教育部高校博士点基金资助项目(20060710004)

摘　　要：根据10个梁高不等钢筋混凝土框架中节点试件在低周反复荷载作用下的试验结果,分析了该类非规则节点的破坏过程和破坏特点.在试验研究的基础上,根据节点区梁柱传来外力的平衡条件,建议了核心区发生剪切破坏的钢筋混凝土中节点受力分析的数学模型,并应用该模型对变梁节点受力性能进行参数分析.研究结果表明:对于核心区发生剪切破坏的节点试件,节点剪力和层间剪力二者并非线性比例关系;梁筋与核心区混凝土二者间的粘结锚固是影响节点抗剪强度的关键参数.Ten specimens of interior joints with different depth beams were tested under reversed cyclic loading.The experimental study was focused on the failure characteristics and failure process of interior joints with different depth beams.Based on the experimental study,a mathematical model for equivalent joint core of interior joint with different depth beams is established for calculating the shear strength of interior joint by satisfying force equilibrium within the joint panel.In addition,a parametric study was undertaken to investigate the behaviour of interior joints with different depth beams.Results indicated that joint shear stress is not proportional to story shear and that the moment resisting capacity depends on the anchorage capacity of beam bar through joint.

关 键 词：中节点 抗剪性能 数学模型 数值分析 

分 类 号：TU375.4[建筑科学—结构工程]