Comparison of Wind-induced Linear and Nonlinear Responses ofa Structure of Expo Axis
hihui Han1; Xuanyi Zhou1;Ming Gu1;Weiyu Zhang2
1．State Key Laboratory for Disaster Reduction in Civil Engineering, Tongji University, Shanghai 200092, China;
2. EastChina Architectural Design and Research Institute Co. Ltd, Shanghai 200002, China
Abstract：Based on the wind pressure data from the wind tunnel test, the distributions of the displacementsand the differences of the values of a structure of Expo Axis, which are obtained linearly and nonlinearly in thetime domain, are analyzed. The results indicate that the cantilevered part of high nonlinear behavior appearsstiffness softening. Because of that, the structure stiffness decreases and the displacement increases. Thedisplacement RSM values computed nonlinearly are greater than those computed linearly, but the differences areacceptable from the viewpoint of engineering application; the comparison of power spectral density curves showssimilar energy distributions.
2009, Vol. 28 
