Derivation and Evaluation of Superior Design Solutions for Steel Buildings

Authors

  • Jiro Takagi Graduate School of Urban Environmental Sciences, Tokyo Metropolitan University, Japan Author
  • Hiroto Tange Shimizu Corporation, Former Graduate Student, Tokyo Metropolitan University, Japan Author

Keywords:

optimization, steel structure, multiple start local search, multiple-type damping device, response history analysis, superior design solution

Abstract

A multiple start local search (MSLS) method was proposed to simultaneously perform local optimization of both the main frame and multiple types of damping devices, such as buckling restrained braces (BRBs) and oil dampers (ODs). The discrete design variables include the cross-sectional dimensions of beams and columns, as well as the layout and performance parameters of BRBs and ODs. Superior design solutions (SDSs) were derived by minimizing the total steel volume of the building, including the equivalent steel volume of BRBs and ODs. The SDSs satisfy both allowable stress design constraints under sustained and moderate seismic loads, and dynamic response constraints under major earthquakes. The proposed method was applied to a 16-story steel office building, and the structural characteristics of the SDSs were evaluated.

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Published

2025-09-30

Issue

Vol. 14 No. 3 (2025)

Section

Articles