Analysis on Properties of Cooperative Work of Curtain Wall Support Structure with Main Structure of Shanghai Tower Under Gravity Loads

Abstract:

A unique flexible suspend curtain wall support structure (CWSS) was ultimately developed to suit the exterior curtain wall system of Shanghai Tower. The top and bottom of CWSS are supported by the elastic boundary (MEP/ amenity floor) of main structure in each zone. The nonuniform and weak stiffness of MEP/amenity floor and heavy weight of CWSS lead to a nonuniform vertical deformation, which has adverse effects on CWSS. By means of integrated model including CWSS and main structure, the properties of cooperative work of CWSS were analyzed in detail, including the properties of nonuniform deformation of CWSS and its effect on the internal forces of CWSS and the safety of curtain wall plates. Based on the analysis results, the stiffness of MEP/amenity floor and the connection details between CWSS and main structure were optimized and adjusted in order to improve the deformation and internal force of CWSS. These optimization and adjustment measures ensure the safety of curtain wall system.