风和地震下上海中心幕墙支撑结构与主结构协同分析

通过将幕墙支撑结构与主体结构整体建模,对风荷载及水平地震作用下幕墙支撑结构与主体结构相对竖向变形特性及其对支撑结构受力影响以及竖向地震作用下支撑结构竖向不均匀变形、内力及加速度反应及其对设计的影响进行了详细分析与研究,研究结果表明,在水平荷载作用下,主体结构与环梁竖向相对变形引起径向支撑的附加弯矩,通过设置滑动构造可减小弯矩保证支撑受力安全;在竖向地震作用下,幕墙系统将产生较大的不均匀变形对板块产生不利影响、吊杆产生较大附加轴力、环梁竖向加速度反应显著,设计时应对以上不利因素进行评估以保证幕墙系统在地震作用下的安全.

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

By means of integrated model including suspend curtain wall support structure (CWSS) and main structure, relative deformation and its effect on CWSS are analyzed under horizontal earthquake and wind load. And the response of vertical nonuniform deformation, internal forces and acceleration of CWSS are also studied under vertical earthquake in detail.Analysis results shown that, Under horizontal loads, vertical relative deformation between main structure and ring beam will lead to additional moments of radial strut. Setting the sliding structure in the end of radial strut can reduce the additional moment and ensure service of curtain wall safety. Under vertical earthquake, a larger nouniform deformation which have an adverse effects on plates, additional axial force of sag rods and significant vertical acceleration response of ring beam will be produced. In the design process, all above adverse factors should be evaluated to ensure the safety of curtain wall system under vertical earthquake.