【摘要】 采用解析和数值方法研究FRP-混凝土杂交梁的界面应力问题。提出了杂交梁的新的力学模型和假设,克服了以往的分析模型中界面应力表达式非常复杂和界面应力的解析解与数值解相差较大的缺点,本文得到的FRP板加固梁的界面剪应力表达式与数值结果符合很好,并且具有简捷的表达式。利用有限元法研究了杂交梁各物理参数对界面剪应力的影响。研究表明,界面剪应力在FRP板的端部存在应力集中或应力奇性,这是造成杂交梁界面破坏的主要原因。这项研究对进行杂交结构的工程设计具有理论指导和参考价值。更多还原

【Abstract】 The interfacial shear stress of FRP concrete hybrid beams is investigated with analytical and numerical methods. A series of assumptions for the mechanical model of the hybrid beams are adopted based on the detailed numerical calculations of the interfacial stresses, and the analytical description of the interfacial stresses is very concise and is agreed well with the corresponding numerical results. Finite element analysis then is used to reveal the influences of the structural parameters on the interfacial shear stress, which facilitates analyzing the interfacial behavior in hybrid structure design.更多还原