Modeling of Buckling Restrained Braces (BRBs) using Full-Scale Experimental Data
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Dosyalar
Tarih
2019
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Korean Society Of Civil Engineers-Ksce
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
Hysteretic performance of buckling restrained braces (BRBs) having various core materials, namely, steel and aluminum alloy and with various end connections are numerically investigated. As a computational tool, nonlinear finite element analyses (FEAs) are performed to better model the hysteretic behavior. For the simulation, various aspects such as 1) stress - strain relationship including the strain hardening effect 2) von Mises yield criterion 3) contact surface parameters between the core metal and surrounding high strength grout and 4) friction are defined. Experimental results from near-full scale cyclic tests on two steel core BRBs having steel casing as a restraining environment (named as BRB-SC4 and BRB-SC5) and an aluminum alloy core & aluminum alloy casing tube (named as BRB-AC3) are used in the analyses. All cyclically tested specimens have been designed according to AISC Seismic Provisions. Numerical results obtained from 3D models developed in ANSYS-Workbench give satisfactory response parameters when compared with the experimental ones (e.g., hysteretic curves, dissipated energies). Further, a convergence analysis regarding element numbers in the developed model is conducted for each BRB specimen. Finally, key issues that influence the hysteretic modeling of BRBs are identified.
Açıklama
Anahtar Kelimeler
buckling restrained braces, steel, aluminum alloy, finite element analysis, cyclic loading, Seismic Response, Design Method, Core Plate, Behavior, Buildings, Performance
Kaynak
Ksce Journal of Civil Engineering
WoS Q Değeri
Q3
Scopus Q Değeri
Q2
Cilt
23
Sayı
10
