Drift demand of the outer-skin curtain wall system of the Shanghai Tower

作者：Huang, Baofeng^*; Lu, Wensheng; Chen, Shiming; Mosalam, Khalid M.

来源：Structural Design of Tall and Special Buildings, 2017, 26(17): e1388.

DOI：10.1002/tal.1388

• curtain wall
• drift demand
• drift spectrum
• interzone
• interstory drift ratio
• Shanghai Tower

As a drift-sensitive nonstructural component, the in-plane deformation ability of the curtain wall (CW) in a tall building is critical to the seismic performance. The immediate earthquake excitation of the CW system is the floor response where the CW is located. To evaluate the drift demand of the outer-skin CW system of the Shanghai Tower, floor responses of the reinforced stories of each vertical zone are analyzed. Drift demands, including the interzone drift ratio (IDR) and interzone drift response spectrum (IDRS), are obtained to define the engineering demand parameters related to the in-plane relative displacement of the CW system. The results show that the 3-dimensional ground motion (GM) excitations generate larger heightwise IDR distribution profiles and larger IDRSs than the 1-dimensional GMs. The obtained IDR demands are shown to be 1/250, 1/150, and 1/100 for 3 key earthquake intensity levels. These values are different from those given by the current code provisions of China and other countries. The IDR distribution profiles of each vertical zone increase with height. The mean IDRSs of all 8 main vertical zones under selected GM excitations are determined as the representative drift spectra for each earthquake intensity level. Based on these mean spectra, simplified bilinear drift spectra are constructed for seismic design and analysis of the outer-skin CW system of the Shanghai Tower.

• 出版日期2017-12-10
• 单位同济大学