设伸缩缝圆形水池的池壁内力计算方法

On Side-wall Internal Force Calculation Method of Circular Tank with Expansion Joint

对于内径>15 m的钢筋混凝土圆形水池,由于在池壁上设置伸缩缝,该类圆形水池池壁不再是整体的圆柱壳。以单悬臂板简化方式计算了池壁底部竖向弯矩;同时,采用有限元程序计算了3种内径的1/4圆弧壳池壁的竖向弯矩,给出了池壁弯矩等高值图。对比显示:有限元计算的池壁竖向弯矩值为单悬臂板计算值的60%～70%。采用考虑空间效应的计算模式进行设计计算比较合理。

For reinforced concrete circular tank with inner diameter>15 m,this side-wall of the tank is not the whole cylindrical shell any longer due to setting up expansion joint on it.The vertical bending moment of side-wall bottom is calculated by single cantilever plate simplified method,and meanwhile,the vertical bending moments of 1/4 cylindrical shell side-wall of 3 inner diameters are calculated by finite element procedure,and then,the side-wall bending moment contour map is given.The contrast can show that the side-wall vertical bending moment value calculated by finite element is the 60%~70% of single cantilever plate calculation value.It is reasonable relatively to adopt the calculation mode considering space effect to make design calculation.