Seismic optimization and performance assessment of special steel moment-resisting frames considering nonlinear soil-structure interaction

Gholizadeh S., Milany A., HASANÇEBİ O.

STEEL AND COMPOSITE STRUCTURES, cilt.47, sa.3, ss.339-353, 2023 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 47 Sayı: 3
  • Basım Tarihi: 2023
  • Doi Numarası: 10.12989/scs.2023.47.3.339
  • Dergi Adı: STEEL AND COMPOSITE STRUCTURES
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Aerospace Database, Communication Abstracts, Compendex, Metadex, Civil Engineering Abstracts
  • Sayfa Sayıları: ss.339-353
  • Anahtar Kelimeler: confidence level, performance-based design, soil-structure interaction, steel special moment frame, structural optimization
  • Orta Doğu Teknik Üniversitesi Adresli: Evet

Özet

The primary objective of the current study is to optimize and evaluate the seismic performance of steel moment -resisting frame (MRF) structures considering soil-structure interaction (SSI) effects. The structural optimization is implemented in the context of performance-based design in accordance with FEMA-350 at different confidence levels from 50% to 90% by taking into account fixed-and flexible-base conditions using an efficient metaheuristic algorithm. Nonlinear response-history analysis (NRHA) is conducted to evaluate the seismic response of structures, and the beam-on-nonlinear Winkler foundation (BNWF) model is used to simulate the soil-foundation interaction under the MRFs. The seismic performance of optimally designed fixed-and flexible-base steel MRFs are compared in terms of overall damage index, seismic collapse safety, and inter -story drift ratios at different performance levels. Two illustrative examples of 6-and 12-story steel MRFs are presented. The results show that the consideration of SSI in the optimization process of 6-and 12-story steel MRFs results in an increase of 1.0 to 9.0 % and 0.5 to 5.0 % in structural weight and a slight decrease in structural seismic safety at different confidence levels.