Analysis on Effect of Construction on Curtain Wall Support Structure of Shanghai Tower

Abstract:

Based on the construction simulation analysis of Shanghai Tower, the preset deformation of suspend curtain wall support structure (CWSS) was studied, and additional internal forces in CWSS caused by the compression of super column were analyzed in detail. The analysis results shown that if the traditional methods of construction, that is, the ring beam is calibrated level by level, is used, the elevation of ring beam will be off the correct level after construction is completied. If the preraising of suspension point and preadjustment of the length of sag rod is adopted, the curtain wall service and geometry can be ensured. The compression of super column can lead to a relative displacement, which is large and complicated, between ring beams and floors of main structure. Construction simulation analysis should be conducted to determine the slide range of the sliding joint between CWSS and main structure under the compression of main structure. And the additional moment of radial strut caused by compression of super column is equivalent to 30% capacity of moment of radial strut. Its adverse effects on the CWSS cannot be ignored.

Key words:Shanghai Tower; suspension curtain wall support structure; construction simulation analysis; preset deformation; shrinkage and creep