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目前,悬挂式钢内筒烟囱的悬挂点都采用焊接的方式,钢内筒在外筒的横向位移作用下会产生一个倾斜角度,从而对承重平台钢梁产生下压力和上拔力,其在悬挂钢梁的截面设计中起控制作用。传统的计算方法并没有考虑这一对力对悬挂钢梁的不利影响,而只考虑内筒的自重作用。以莱州某百万机组工程为例,旨在通过一种竖向无约束悬挂点做法,释放传统做法产生的下压力和上拔力,使悬挂钢梁的截面更经济合理,并将这种做法与传统做法的计算结果作比较,说明竖向无约束悬挂点的优点。
At present, the suspending points of suspended steel inner chimney are all welded, and the steel inner cylinder will generate a tilt angle under the lateral displacement of the outer cylinder, thereby generating downward pressure and pulling force on the steel girder of the bearing platform, Steel girder section design plays a controlling role. The traditional calculation method does not consider the adverse effect of this pair of forces on the suspended steel beams, but only considers the self-weight of the inner cylinder. Taking a million units in Laizhou as an example, this method aims to release the downward pressure and pull-up force produced by the traditional method through a vertical unconstrained suspension point method, so that the cross-section of the suspended steel beam is more economical and reasonable. Compared with the calculation results of the traditional method, the advantage of vertical unconstrained suspension points is illustrated.