Proposed seismic performance factors for linked column frame systems using FEMA-P695 methodology
Engineering Structures, cilt.365, 2026 (SCI-Expanded, Scopus)
- Yayın Türü: Makale / Tam Makale
- Cilt numarası: 365
- Basım Tarihi: 2026
- Doi Numarası: 10.1016/j.engstruct.2026.123286
- Dergi Adı: Engineering Structures
- Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Compendex, Geobase, ICONDA Bibliographic, INSPEC, The International Construction Database (ICONDA), Academic Search Ultimate (EBSCO), Engineering Source (EBSCO)
- Anahtar Kelimeler: Earthquake-Resistant Design, FEMA P695, Linked Column Frame, Nonlinear Time History Analysis, Response Modification Factor, Seismic Performance Factors
- Orta Doğu Teknik Üniversitesi Adresli: Evet
Özet
The Linked Column Frame (LCF) system is a relatively recent lateral force-resisting system designed to reduce repair costs and downtime after earthquakes through replaceable links while satisfying conventional life safety performance objectives under design-level seismic demands. However, existing studies primarily adopt seismic performance factors from Special Moment Resisting Frame (SMRF) systems without a systematic evaluation specific to LCF behavior. This study develops seismic performance factors for LCF systems using the FEMA P695 methodology. Thirty-one archetype buildings (3-, 6-, and 9-story) were designed with standard W-shapes and built-up section (BUS) short and intermediate links. Various combinations of the response modification factor (R) and displacement amplification factor (Cd) were investigated. Nonlinear time history analyses were conducted in OpenSees using 44 ground motion records. Structural performance was evaluated based on link rotation, interstory drift, and residual drift under Design Basis, Maximum Considered, and Collapse-Level earthquakes. Results indicate that the Cd/R ratio is a key parameter governing the strength and stiffness of LCF systems, while interstory drift is the controlling performance criterion compared to link rotation and residual drift. Maximum interstory drift demands decreased with increasing building height, identifying 3-story LCF systems as the most vulnerable. An optimal combination of R= 8 and Cd= 3 provides reliable seismic performance while reducing structural weight and construction cost relative to SMRF-based designs. These findings establish a consistent, performance-based basis for selecting seismic design factors for LCF systems and support their broader application in earthquake-resistant design.