仿生互锁砌体结构的拉伸性能

The Tensile Propertles of Bioinspired Interlock Masonry Structure

针对由领结状砌块和砂浆形成的砌体结构,运用契合理论和均匀化方法分析了其轴向拉伸变形和应力应变关系,得到弹性阶段有效模量及强化阶段泊松比和应变能与砌块几何尺寸和界面性质之间的关系;并在此基础上讨论了互锁砌体结构的强化机理及实现方式。结果表明,由于砌体交叠区界面倾斜和摩擦作用,砌块相互滑移难度加大而形成互锁,结构实现强化。现实的工程意义是,引入倾斜界面能有效地改善砌体的拉伸性能。

For the interlocking masonry structure stacked by cravat shaped brick and mortar,regular tessellation theory and homogenization theory are used to analyze the axial tensile deformation and stress-strain curve. The relationship between effective modulus in elastic phase and Poisson＇s ratio and strain energy in inelastic phase and geometry of brick and property of interface is constituted through the analysis. Based on obtained curve and relationship,the strengthening mechanism and realizing way of the masonry structure are discussed. It is found that neighboring bricks sliding are impeded by the interlock in overlap region due to the inclined interface and friction. The practical meaning is the tensile properties of masonry structure can be usefully improved by the introduced declining interface.