全装配式混凝土墙板结构的竖向接缝研究

Research on vertical joint of full prefabricated concrete panel structure

目前国内装配式混凝土结构规程和标准中对于竖向接缝荷载效应的计算方法都少有提及,而竖向接缝承载力计算公式的研究却比较多。对于竖向接缝而言,只知道其承载力而未知其荷载效应,则无法判断其是否安全。根据组合梁荷载效应的计算方法来研究全装配式混凝土结构竖向接缝荷载效应的计算方法,在弯矩作用下,根据平截面假定,两片墙体不仅受到按其各自刚度分配得到的弯矩的作用还受到附加轴力的作用,分配得到的弯矩和附加轴力共同作用下的应力图与总的弯矩作用下的应力图一致;竖向接缝的荷载效应为弯矩以及轴力作用的效应之和。建立一种新的竖向接缝连接形式,并通过对相关内容的研究,提出一个承载力计算公式。

At present,the calculation method of the load effect at the vertical joints is rarely mentioned in the domestic specification and standards for precast concrete structures. For the bearing capacity of vertical joints,there are many researches on the calculation method. For the vertical joints,it cannot determine whether it is safe if only its bearing capacity is known rather than its load effect. According to the calculation method of composite beam load effect,the calculation method of vertical joint load effect of full prefabricated concrete structure was studied. Under the action of bending moment,according to the assumption of flat section,the two walls are not only affected by the action of moment distributed according to their respective stiffness and are also affected by the additional axial force. The stress diagram under the combined action of distributed bending moment and additional axial force is consistent with the stress diagram under the action of total bending moment. The vertical joint load effect is the sum of the effects of bending moment and axis force. A new form of vertical joint was established. Based on the research of related content,a formula of bearing capacity calculation was proposed.