模数多孔砖墙体强度和变形的试验研究

The Experimental Research on Strength and Deformation of the Modular Perforated Clay Brick Walls

在多孔砖墙体承受反复侧向力试验研究的基础上，分析了多孔砖墙体的抗震性能。多孔砖墙体力学性能试验表明，由于孔洞中砂浆的销键作用，模数多孔砖墙体的剪切强度比普通砖墙体要稍高一些。抗压强度和弹性模量亦比普通砖砌体稍高一些。不同高宽比、不同正压力与砂浆强度比的大尺寸墙体承受反复水平荷载的试验表明，其破坏机制与普通砖墙体相同。多孔砖墙体侧向承载能力比现行规范值稍大一些。可得结论，按现行规范来确定多孔砖砌体的强度指标和对多孔砖房屋进行设计是可靠的。但在竖向和水平荷载的联合作用下，在墙体某些部位的多孔砖常产生劈裂现象。在房屋的设计中，应该做一些延性构造措施，以控制和减少劈裂的发展。

In this paper,the seisrnic behaviour of modular perforated clay brick(MPCB)masonry is studied on the basis of the experimental research of its wall specilmen under the action of lateral reverse load.The test shows that shear strength is a little higher than the one in the standard clay brick(SCB)masonry due to the dowel action of mortar in the perforation and so is the cornpressive strength and young's modulus. The test of large size walls with different.ratios of height to width and ratios of compressive stress to mortar strength under reverse horizontal loading reveals that the failure mechanism of the MPCB wall is the same as the SCB one. The ability of carrying lateral load by MPCB wall is a little higher than the value specified by the present code. It is concluded that according to the current code,prediction of mechanical proper- ties of the MPCB masonry is reasonable and design of the MPCB building is reliable. But the split in some local parts of MPCB masonrv wall sometimes came out under the combined action of vertical and horizontal loads.So in the design of MPCB building,some ductility construction should be taken to control or reduce the splreead of the split.