摘要
为分析FRP-混凝土组合梁的斜截面受剪承载力,在拉压杆模型的基础上,建立了考虑FRP板与混凝土界面发生黏结滑移的FRP-混凝土组合梁拉压杆受剪承载力模型。该模型中,将配置在受拉区的FRP板简化为拉杆,而将变形非协调区的混凝土简化为压杆。为反映FRP与混凝土界面之间的黏结,建立了拉压杆节点区的破坏准则———界面剪应力达到最大黏结剪应力。为验证建立模型的有效性,对已有的试验梁进行了受剪承载力和斜裂缝开裂角度的计算分析。计算结果表明,建立的受剪承载力模型可以有效地预测组合梁的受剪承载力和斜裂缝开裂角度,与试验值吻合较好。
A strut-and-tie model was proposed to analyze the shear strength of FRP-concrete composite beam according to the bonding failure at the FRP-concrete interface. In this model, the FRP plate was considered as a tie bar and the compressive concrete in discontinuity zone could be considered as a strut bar. The failure criterion （i. e. maximum bonding shear stress） at the strut-tie nodal region was used to indicate bonding at the FRP-concrete interface. The authors and Hall and Mottram＇ s beam tests were compared with the propped model in terms of the ultimate loads and angles of diagonal cracks. The calculated results show that there are good agreements between the test values and modeled values and the model can be used to predict the load carrying capacity of composite beams effectively.
出处
《建筑结构学报》
EI
CAS
CSCD
北大核心
2012年第9期136-140,共5页
Journal of Building Structures
基金
国家自然科学基金项目(51078079)
