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- Title
AN APPROXIMATION METHOD FOR COMPUTING THE DYNAMIC RESPONSES AND EQUIVALENT STATIC WIND LOADS OF LARGE-SPAN ROOF STRUCTURES.
- Authors
ZHOU, XUANYI; GU, MING
- Abstract
Due to their sensitivity to wind, the design of large-span roofs is generally governed by wind loads. For some flexible large-span roofs with low damping and concentrated modes, the effect of multi-mode coupling should be taken into account in computing the resonant buffeting response and equivalent static wind loads. Such an effect is considered by the modified SRSS method in this paper via the modal coupling factor. Based on the same SRSS method, the equivalent static wind loads combining the mean, background, and resonant components, are computed. Particularly, the background and resonant components are computed by the LRC method and the equivalent inertia force method considering the modal coupling effects by the modified SRSS method, respectively. The method is then applied to the computation of wind-induced vibration responses and equivalent static wind load distributions of a real large-span roof. The results show that the modal coupling effect on the resonant component can be identified by the present method with high accuracy.
- Subjects
APPROXIMATION theory; WIND pressure; STIFF computation (Differential equations); DEAD loads (Mechanics); ROOF design &; construction; DAMPING (Mechanics); SQUARE root
- Publication
International Journal of Structural Stability & Dynamics, 2010, Vol 10, Issue 5, p1141
- ISSN
0219-4554
- Publication type
Article
- DOI
10.1142/S0219455410003944