【摘要】 杂交结构是指用高强复合材料(纤维增强塑料-FRP-板)加固或修复的混凝土结构。利用提出的杂交结构界面应力分析的理论模型,推导出轴对称杂交柱的界面剪应力的显函数表达式,研究了模量比及尺寸效应对界面剪应力的影响,并与有限元法的分析结果进行了数值比较。研究表明:本文的理论模型适合于广泛参数范围内的杂交结构界面力学性能分析,与有限元计算结果符合很好。这一研究有助于对杂交结构界面行为的深入理解。更多还原

【Abstract】 Hybrid structures refer to the existing concrete structures are strengthened by the high strength composite materials ( Fiber reinforced plastic - FRP - plate) . Using the raised theoretical model for analysis of the interfacial stresses of hybrid structures, the explicit expression for the interfacial shear stress of axisymmetric hybrid column has been derived. The effects of the modulus ratio of FRP and concrete as well as the aspect ratio of the column and thickness of FRP plate on the interfacial shear stress are studied. The theoretical results agree well with the results calculated by the finite element method. It is shown that the present research provides a comprehensive understanding on the mechanical behaviour of the interface in hybrid structures.更多还原