Optimum Location of Outriggers with Frame-Outriggers Interaction Using GA

There are numerous structural lateral systems used in high-rise building design suchas: shear frames, shear trusses, frames with shear core, framed tubes, trussed tubes, etc.The outriggers and belt trusses system is the one providing significant drift control forthe building where the core alone is not rigidenough to resist lateral loads. In this study,Optimum locations of the outriggers have been obtained in steel structures. Theoptimum location of outriggers is obtained in two cases and a novel evolutionaryalgorithm based upon genetic algorithm (GA) is used. In the first case, optimumlocation for outrigger is found while the sections of outrigger are constant. In the secondcase, the optimum location of outrigger is found while the sections of outrigger isdesigned with frame members. According to the results, there is 36% reduction in thetop displacement with using outrigger. Furthermore, the optimum location of outriggeris higher in the cases with interaction in comparison with constant cases

Keywords:

High-rise buildings , Belt truss systems , Outriggers , Optimum location , Lateral loads , Genetic Algorithm