Dynamic along-wind response of simple structures

The paper presents three essential modifications of the current analysis of the dynamic along-wind response of simple structures. It is demonstrated t hat the consistency requirement of zero mean turbulent flow leads to a redu ction of the high-frequency response. A simple representation of the joint acceptance function via an accurate explicit approximation to the two-dimen sional area of the joint acceptance integral of the cross-spectrum is prese nted. The total response is obtained from superposition of a quasistatic an d a modal part. The new proposals are presented as an integral part of a cr itical appraisal of basis of analysis of dynamic along-wind response, sugge sting that the turbulence length-scale is adequately represented by a simpl e power function of height. The results are summarised in the form of a des ign procedure, illustrated by examples. (C) 1999 Elsevier Science Ltd. All rights reserved.