密肋复合墙板框格与填充块相互作用机理研究

Research on Interaction Mechanism Between Frame Grids and Filling Blocks of Multi-ribbed Composite Wall

为了研究密肋复合墙板中框格与填充块间的相互作用机理,进行了5个框格单元的单调加载试验,讨论了框格单元的破坏过程及破坏特征,试验表明:填充块的作用可等效为铰接于框格的对角斜压杆.基于弹性地基梁理论提出了斜压杆等效宽度计算方法及强度、刚度的计算公式.计算表明:简化模型能够较好地模拟框格单元在弹性阶段的受力性能,为进行复合墙板的受力分析及设计提供理论基础.

Five fundamental frame structures are tested under monotonic load in order to study the interaction mechanism between frame grids and filling blocks of multi-ribbed composite wall, and the failure process and failure characteristics are summarized in details. The experiments show that effect of the filling block is equivalent to that of hinged-diagonal strut. The calculation of width of the strut is given based on elastic foundation beam theory as well as the formulas of rigidity and intensity. Calculation shows that the simplified model can simulate mechanical properties of the fundamental frame structure in elastic stage, which offers a theoretical basis for analysis and design the multi-ribbed composite wall.