%0 Journal Article %T TunnedTTStochastic Directional Search: an Efficient Heuristic for Structural Optimization of Building Frames %J Scientia Iranica %I Sharif University of Technology %Z 1026-3098 %A Shahrouzi, Mohsen %A Pashaei, Mahdi %D 2013 %\ 08/01/2013 %V 20 %N 4 %P 1124-1132 %! TunnedTTStochastic Directional Search: an Efficient Heuristic for Structural Optimization of Building Frames %K Stochastic Directional Search %K Structural Design %K Sizing Optimization %K Building Frame %R %X Performance of an optimization heuristic highly depends to the method it employs to represent and decompose the search space. A class of optimization methods including swarm intelligence utilize an especial way of decomposing the search space via specified direction states. The present work expands the idea providing a stochastic directional state search with tuned thresholds for selecting every direction state. The proposed meta-heuristic is then utilized for the problem of structural weight minimization in building frames under lateral and gravitational loading using a finite element analyzer. Treating a number of examples from literature, efficiency and effectiveness of the proposed method is shown superior to some other meta-heuristics including an improved particle swarm optimizer %U https://scientiairanica.sharif.edu/article_1492_f3cea9b02cc96faaa2e26078828abcc7.pdf