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整体爬升钢平台模架装备在超高层混凝土结构建造中日益得到广泛应用,在其施工作业阶段筒架支撑系统是关键承力系统。针对筒架支撑系统在竖向荷载作用下的稳定承载性能进行分析。筒架支撑单元的稳定承载力可在弹性屈曲荷载基础上根据长细比与稳定系数的关系计算得到;筒架支撑结构可考虑筒架支撑单元之间连接梁的约束作用,按计算长度系数法获得其稳定极限承载力;筒架支撑系统可忽略筒架支撑结构之间连接梁的约束作用,简化为筒架支撑结构进行稳定性设计计算。
The overall climbing steel platform formwork equipment has been increasingly used in the construction of super high-rise concrete structures. In the construction operation stage, the support system of the cylinder frame is the key bearing system. The stability of the support structure of the cylinder support system under vertical loads was analyzed. The stable bearing capacity of the cylinder support unit can be calculated based on the relationship between the slenderness ratio and the stability factor on the basis of the elastic buckling load; the support structure of the cylinder can consider the restraint effect of the connecting beam between the support units of the cylinder support, according to the calculated length coefficient method. The stable ultimate bearing capacity is obtained; the support system of the cylinder can ignore the restraint effect of the connecting beam between the support structures of the cylinder frame, and simplifies the stability design calculation for the support structure of the cylinder frame.