Drift Concentration of a Three-Story Special Concentrically Braced Frame with Strongback under Earthquake Loading
| Autor: | Yao Tang, Chui-Hsin Chen, I Jung Tsai |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Soft story building
021110 strategic defence & security studies Materials science business.industry 0211 other engineering and technologies Stiffness 020101 civil engineering Strength factor 02 engineering and technology General Medicine Structural engineering 0201 civil engineering Nonlinear system Buckling medicine Braced frame Deformation (engineering) medicine.symptom Reduction (mathematics) business |
| Zdroj: | Applied Mechanics and Materials. 863:287-292 |
| ISSN: | 1662-7482 |
| DOI: | 10.4028/www.scientific.net/amm.863.287 |
| Popis: | In conventional special concentrically braced frame (SCBF) structures, the buckling of the braces leads to severe reduction in system strength and stiffness. Therefore soft story mechanisms followed by large permanent deformation are commonly observed in SCBF structures. The strongback system using additional structural components along the height of the building to resist local deformation is able to improve the distribution of the drift. This research conducted case studies to investigate the effects of strength and stiffness of the strongback system on the behavior of typical three-story SCBF system. The primary variables to be investigated are stiffness factor α (strongback stiffness/SCBF stiffness) and strength factor β (strongback strength/SCBF strength). We conducted nonlinear dynamic analyses to evaluate the effectiveness of α and β on structural demand parameters including maximum drift ratio and drift concentration factor (DCF). Analyses results show that although strongback system with excessively high α and β will reduce maximum drift ratio and DCF of SCBF systems, it is noneconomic. On the other hand, strongback systems with low α and β (α |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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