Strengthening Scheme of Mast-cable for Sliding Construction of Super Large Area Single-layer Grid Shell Structure
Due to the weak out-of-plan stiffness of the single-layer grid shell,the integral sliding has higher requirements for its shape control.It is necessary to accurately control its deflection to ensure that the structural stress and deformation during the sliding process are controlled within a safe range,at the same time,it lays the foundation for the precise docking of the grid shell and the grid column when the sliding is in place.In order to control the deflection and stress of the roof,two roof strengthening schemes of single mast-cable and V-shaped mast-cable are proposed.The mast-cable is a self-balancing system,which will not add any additional force to the sliding support bed-jig and the longitudinal support truss,and the mast strengthening scheme makes full use of the upper space of the roof without affecting the normal operation of the crane and construction equipment under the roof.It is found that the two roof strengthening schemes can effectively control the deflection of the grid shell and reduce the V-shaped support pressure between the grid shell and the sliding track.
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