Effects of pulse-type near-fault ground motions on the nonlinear seismic response of steel frames with inverted-V CBF and EBF systems
Scientific Reports, cilt.16, sa.1, 2026 (SCI-Expanded, Scopus)
- Yayın Türü: Makale / Tam Makale
- Cilt numarası: 16 Sayı: 1
- Basım Tarihi: 2026
- Doi Numarası: 10.1038/s41598-026-62932-2
- Dergi Adı: Scientific Reports
- Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, BIOSIS, Chemical Abstracts Core, EMBASE, MEDLINE, Directory of Open Access Journals, Zoological Record, Academic Search Ultimate (EBSCO), Natural Science Collection (ProQuest), Biological Science Database (ProQuest), Biomedical Reference Collection: Corporate Edition (EBSCO), Health Research Premium Collection (ProQuest)
- Anahtar Kelimeler: Concentrically braced frames (CBFs), Eccentrically braced frames (EBFs), Inverted-V bracing, Near-fault seismic excitation, Pulse effects, Shear and axial hinges, Steel frames
- Açık Arşiv Koleksiyonu: AVESİS Açık Erişim Koleksiyonu
- Karadeniz Teknik Üniversitesi Adresli: Evet
Özet
The type of lateral load-resisting system plays a critical role in controlling the seismic response of steel structures subjected to strong ground motions. In this research, the structural performance of three-dimensional (3D) steel buildings designed with concentrically braced frames (CBFs) and eccentrically braced frames (EBFs) under near-fault ground excitations (NFGEs). A 3D steel building with dual bracing systems, including inverted-V-shaped EBFs and CBFs, were designed under the influence of NFGE. The response of 4 and 8-story structures subjected to NFGE was assessed using nonlinear time history analyses (NTHAs), which were categorized into small-pulse (SP), medium-pulse (MP), and large-pulse (LP) scenarios. This research aims to assess how pulse characteristics affect lateral story and inter-story displacements in buildings of different heights, as these displacement demands are critical indicators of seismic performance and structural strength degradation. This study provides a systematic evaluation of the seismic response of low- and mid-rise CBF and EBF systems under different pulse-type near-fault ground motions, highlighting the role of lateral story displacements as a key performance indicator. The results demonstrate that seismic performance is highly dependent on building height and pulse characteristics, with EBFs showing superior performance in mid-rise buildings under medium-pulse excitations, while CBFs are more effective in low-rise structures, emphasizing the need for height- and pulse-specific bracing strategies.