Ductility Reduction Factors for Steel Buildings Modeled as 2D and 3D Structures

Abstract:

The global ductility parameter (μ_G), commonly used to represent the capacity of a structure to dissipate energy, and the associated ductility reduction factor (R_μ), are estimated for steel buildings with perimeter moment resisting frames (PMRF), which are modeled as 2D and 3D complex MDOF systems. Results indicate that the μ_G value of 4, commonly assumed for moment resisting steel frames, cannot be justified. A value of 3 is more reasonable. The values of μ_G and R_μ may be quite different for 2D and 3D structural representations or for local and global response parameters, showing the limitation of the commonly used Equivalent Lateral Force Procedure (ELFP). Thus, the ductility and ductility reduction factors obtained from simplified structural representation must be taken with caution.

• Periodical: Applied Mechanics and Materials (Volume 595)
• Pages: 166-172
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.595.166
• Online since: July 2014
• Authors: Alfredo Reyes-Salazar*, Eden Bojorquez, Achintya Haldar, Arturo Lopez-Barraza, J. Luz Rivera-Salas
• Keywords: 2D, 3D MDOF Systems, Ductility Capacity, Ductility Reduction Factors, Nonlinear Time History Analysis, Perimeter Moment Resisting Frames, Steel Buildings

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