摘要
为研究型钢再生混凝土梁柱中节点的受剪承载力,在型钢再生混凝土梁柱中节点试验研究的基础上,对其受剪机理进行了分析。结果表明:型钢再生混凝土梁柱中节点的破坏模式主要是剪切斜压破坏,其受力机理为钢筋再生混凝土斜压杆,钢"框架-剪力墙"和钢筋空腹桁架的综合作用,将节点域的受剪承载力分为三部分,即节点域型钢腹板"剪力墙"和翼缘"框架"、节点域再生混凝土斜压杆、节点域箍筋的受剪承载力;通过对试验数据的回归分析,提出型钢再生混凝土梁柱中节点受剪承载力计算公式,该计算式不仅考虑了梁、柱对节点域实际受力状态的影响,而且考虑了翼缘"框架"对再生混凝土的约束作用,采用计算式得到的结果与试验值吻合较好。
In order to research the shear capacity of steel reinforced recycled concrete (SRRC) beam-column interior joints, the shear mechanism was analyzed based on the test of steel reinforced recycled concrete joints. The results indicate that the typical failure mode is diagonal shear compression in the core of the joint. The shear mechanism is the combination of reinforced concrete diagonal strut mechanism, steel frame-shear wall mechanism and reinforcement vierendeel truss mechanism. The shear capacity of joint is composed of the contribution of steel webs and flange frame, the contribution of the compression diagonal strut, and the contribution of stirrup in the recycled concrete core. Base on regression analysis of the test data, the formula for calculation of the shear capacity in the recycled concrete core was proposed. Not only the effect of beam and column on actual stressing state of the joint, but also the confinement provided by flange frame in the recycled concrete core was taken into account in the formula. The calculating results are in good agreement with test results. © 2016, Editorial Office of Journal of Building Structures. All right reserved.
出处
《建筑结构学报》
EI
CAS
CSCD
北大核心
2016年第S2期24-29,共6页
Journal of Building Structures
基金
国家自然科学基金项目(51178384)
住房和城乡建设部科学技术项目(2012-K2-12)
陕西省教育厅科研计划项目(12JK0902)
西安建筑科技大学创新团队发展计划项目
关键词
型钢再生混凝土
中节点
受剪机理
承载力
Bearing capacity
Composite structures
Flanges
Recycling
Regression analysis
Reinforced concrete
Struts