DRIFT CONTROL OF HIGHRISE BUILDINGS WITH UNIT LOAD METHOD

The use of displacement participation factors obtained by the unit loa d method provides an effective drift control tool for high-rise buildi ngs. Structural sensitivity coefficients and displacement participatio n factors for members in a structure with respect to the lateral displ acement to be controlled are computed and used for identifying active members and their corresponding displacement components. The drift con trol method using the displacement participation factors with a variab le linking strategy is formulated into an optimization problem to dete rmine the amount of material to be modified. Using the drift control m ethod, a structural design model for a high-rise building is proposed and applied to one verifying example and two moment resisting frames. Time consuming trial-and-error processes related to the structural des ign of a high-rise building is avoided by the proposed structural desi gn model. As demonstrated in the examples, the maximum lateral displac ements of the examples are reduced by 57.05, 40.0 and 16.36% without c hanging the total weights of the structures. (C) 1977 by John Wiley & Sons, Ltd.