BUFFETING OF TALL STRUCTURES BY STRONG WINDS.

A procedure is presented for calculating alongwind response which incorporates and utilizes advances in the state of the art. The basic structural, meteorological nand aerodynamic models employed are described, and expressions for the alongwind deflections and accelerations, consistent with those models, are derived. A computer program is presented for calculating the alongwind response of structures with unusual modal shapes or for which the contribution of the higher modes to the response is significant. A simple procedure is presented which makes use of graphs and on the basis of which rapid manual calculations of the alongwind deflections and acceleratio can be performed. Numerical examples are given to illustrate the use of the computer program of the graphs.