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<p>This study investigates and compares the relative cost-efficiency and seismic performance of two stability design approaches: the effective length method (ELM) and the direct analysis method (DM). Four steel special frames are first optimized for minimum weight under both design approaches using a recently developed design-driven optimization technique called capacity controlled search (CCS). The constraints governing each design, such as demand-to-capacity ratios and inter-story drift constraint ratios, are identified and presented. Subsequently, the seismic performance of the optimum designs is assessed by a nonlinear static procedure in compliance with ASCE/SEI 41-13. Finally, the results are compared to identify which stability design method leads to more economical and seismically resilient designs in general.</p>

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Investigating Cost-Efficiency and Seismic Performance of Design Methods for Steel Special Frames

  • 期刊论文

  • 发表日期：

    2026年4月30日

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  • Hasan Eser,
  • Oğuzhan Hasançebi,
  • Saeed Gholizadeh

摘要

This study investigates and compares the relative cost-efficiency and seismic performance of two stability design approaches: the effective length method (ELM) and the direct analysis method (DM). Four steel special frames are first optimized for minimum weight under both design approaches using a recently developed design-driven optimization technique called capacity controlled search (CCS). The constraints governing each design, such as demand-to-capacity ratios and inter-story drift constraint ratios, are identified and presented. Subsequently, the seismic performance of the optimum designs is assessed by a nonlinear static procedure in compliance with ASCE/SEI 41-13. Finally, the results are compared to identify which stability design method leads to more economical and seismically resilient designs in general.