Wind Tunnel Tests and Wind-Induced Vibration Analysis of Spherical Domes

Abstract

A series of wind pressure measurements on the surfaces of spherical domes are carried out in an atmospheric boundary-layer wind tunnel. The wind pressure distributions on the surfaces of spherical domes including mean and standard deviation are presented.Effects on wind pressure distribution due to wall-height-to-span ratio and rise-to-span ratio, terrain type and Reynolds number are discussed. This study focuses on wind-induced vibration analysis. The Proper Orthogonal Decomposition (POD) technique is adopted to reconstruct the wind pressure field for reticulated spherical domes with different mesh size and shape, and compared with those obtained from a wind-tunnel test model. A new treatment of non-uniformly distributed taps is proposed. Different treatments lead to different optimal problems with different physical meanings. For mode superposition analysis of wind-induced vibration analysis, a new matrix, designated by the authors as a mode-load-correlation matrix, is proposed to determine the special mode that contributes most to the wind effects. This mode contributes most to the background response and significantly to the resonant part. The physical meaning of this matrix is the spatial distribution of structural response. The advantage is that it only takes into account the known variables in the motion equation, without any quasi-static or dynamic assumption. Finally, the application of this matrix to background response is presented.

Ladder form Rib-Ring Type of Spherical Reticulated Shells: A Novel Type of Latticed Shells

“…With respect to structural performances of reticulated structures, nonlinear static instability analysis is well worth being studied with consideration of initial geometrical imperfections [5]. Recently wind-induced vibration analysis of single-layer reticulated shells is carried out based on synchronous wind pressure measurement [6] and proper orthogonal decomposition method [7]. Higher-order modes' fundamental contribution to dynamic response is the inherent requirement of thinshell like characteristics of single-layer spherical reticulated shells.…”