EQUIVALENT STATIC WIND LOADS FOR MULTIPLE TARGETS BASED ON WIND-INDUCED RESPONSE

Fundamental loading vectors are selected to express equivalent static wind loads (ESWL) for multiple targets, on the basis of wind-induced response characteristics. The eigen-mode of wind loads is selected when the background response is much bigger than the resonant response and one dominant eigen-mode exists in the response. Modal inertial force is selected when the resonant response is much bigger than the background response and one dominant structural mode exists in the response. Unit loading vectors at each node along the normal direction of the roof surface are selected as fundamental loading vectors, if no dominant mode exists in the response. Combination factors of these fundamental loading vectors are obtained with a least square approximation method. This method is employed to study ESWLs of a plane truss and a single-layer dome, and the results show that the presented method has good calculation precision.