Seismic performance evaluation of buckling restrained braced frames (BRBF) using incremental nonlinear dynamic analysis method (IDA)

M. Khorami, M. Khorami, M. Alvansazyazdi, M. Shariati, Y. Zandi, A. Jalali and M.M. Tahir

Abstract

In this paper, the seismic behavior of BRBF structures is studied and compared with special concentric braced frames (SCBF). To this purpose, three BRBF and three SCBF structures with 3, 5 and 10 stories are designed based on AISC360-5 and modelled using OpenSees. These structures are loaded in accordance with ASCE/SEI 7-10. Incremental nonlinear dynamic analysis (IDA) are performed on these structures for 28 different accelerograms and the median IDA curves are used to compare seismic capacity of these two systems. Results obtained, indicates that BRBF systems provide higher capacity for the target performance level in comparison with SCBF systems. And structures with high altitude (in this study, 5 and 10 stories) with the possibility of exceeding the collapse prevention performance level, further than lower altitude (here 3 floors) structures.

Key Words

incremental nonlinear dynamic analysis (IDA); buckling restrained braced frame (BRBF); special concentric braced frame (SCBF); seismic performance; level exceedance probability; analytical fragility curve

Address

M. Khorami : Facultad de Arquitectura y Urbanismo, Universidad Tecnológica Equinoccial, Calle Rumipamba s/n y Bourgeois, Quito, Ecuador /Facultad de Ingeniería Civil y Ambiental, Escuela Politécnica Nacional, Ladrón de Guevara E11-253L, Quito, Ecuador M. Khorami : Civil Engineering Department, Islamic Azad University, Tehran, Iran M. Alvansazyazdi : Facultad Ingeniería Ciencias Físicas y Matemática, Carrera Ingeniería Civil, Universidad Central del Ecuador, Quito, Ecuador 5Facultad de Arquitectura, Universidad Laica Eloy Alfaro de Manabí, Ecuador M. Shariati and A. Jalali : Faculty of Civil Engineering, University of Tabriz, Tabriz, Iran Y. Zandi : Department of Civil Engineering, Tabriz Branch, Islamic Azad University, Tabriz, Iran M.M. Tahir : UTM Construction Research Centre, Faculty of Civil Engineering, Institute for Smart Infrastructure and Innovative Construction, UTM, 81310, Johor Bahru, Johor, Malaysia

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