设控制缝砌块墙体抗侧刚度的试验研究

通过一片设置控制缝砌块墙体在复合受力状态下的抗侧移试验，了解墙体的开裂刚度及破坏状态，并借助有限元程序建立了四种宽高比的墙体模型，研究分析了控制缝对实际工程中墙体抗侧移刚度的影响，认为控制缝引起墙体抗侧刚度的降低是有限的，刚度的降低程度随宽高比的增加而逐渐减少，为地震区合理设置控制缝提供试验与理论依据并总结了设缝墙体的抗侧移刚度公式，供工程应用参考。

Lateral rigidity of block wall with control joints

The crack rigidity and failure pattern of the wall are understood,the effects of the control joints on the lateral rigidity of the wall are studied,based on the test of one wall with control joint under two-way loading,and the results of the FEM analysis on four types of wall modes with different ratio of width to height .Experimental and analytic results show that the control joint has an limited effect on the lateral rigidity and the drop in the degree of rigidity reduces gradually with increase of ratio of width to height ,which provide experimental and theoretical basis for the installation of control joints reasonably in seismic areas.At the same time,the formulation of the lateral rigidity of the wall with control joint was proposed.It is useful for engineering design.