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Subassemblage tests and numerical analyses of buckling-restrained braces under pre-compression
HighlightsCyclic pure compression and hysteresis tests are conducted.FE results well predict mechanical variables of specimens with a discrepancy less than 3.0%.BRBs with different pre-compression strains are investigated via FE models.Mechanical variables of BRBs obtained from FE analyses provide valuable reference for design.
AbstractPre-compression loads are conducted in BRBs if the installation of frames and BRBs are performed simultaneously. In this paper, the load-carrying and energy-dissipating behavior of BRBs under pre-compression are investigated by subassemblage tests and additional finite element (FE) analyses. A total of five specimens were tested, in which two specimens were tested by cyclic pure compression loads and three specimens were tested by hysteresis loads; four of them maintained stable load-carrying behavior during loading process. The load-carrying and energy-dissipating behavior of the specimens were satisfactorily simulated using a refined FE model with a combined isotropic and kinematic hardening rule of the core material, and the compression strength adjustment factor and the stress enhancement coefficient were well predicted by the FE analytical results with a relative error less than 3.0%. The FE analytical results of BRBs with different pre-compression strains are presented, indicating that the pre-compression in a BRB would aggravate the stress enhancement of the core material in both tension and compression, yet it would hardly influence the value of the compression strength adjustment factor.
Subassemblage tests and numerical analyses of buckling-restrained braces under pre-compression
HighlightsCyclic pure compression and hysteresis tests are conducted.FE results well predict mechanical variables of specimens with a discrepancy less than 3.0%.BRBs with different pre-compression strains are investigated via FE models.Mechanical variables of BRBs obtained from FE analyses provide valuable reference for design.
AbstractPre-compression loads are conducted in BRBs if the installation of frames and BRBs are performed simultaneously. In this paper, the load-carrying and energy-dissipating behavior of BRBs under pre-compression are investigated by subassemblage tests and additional finite element (FE) analyses. A total of five specimens were tested, in which two specimens were tested by cyclic pure compression loads and three specimens were tested by hysteresis loads; four of them maintained stable load-carrying behavior during loading process. The load-carrying and energy-dissipating behavior of the specimens were satisfactorily simulated using a refined FE model with a combined isotropic and kinematic hardening rule of the core material, and the compression strength adjustment factor and the stress enhancement coefficient were well predicted by the FE analytical results with a relative error less than 3.0%. The FE analytical results of BRBs with different pre-compression strains are presented, indicating that the pre-compression in a BRB would aggravate the stress enhancement of the core material in both tension and compression, yet it would hardly influence the value of the compression strength adjustment factor.
Subassemblage tests and numerical analyses of buckling-restrained braces under pre-compression
Guo, Yan-Lin (author) / Tong, Jing-Zhong (author) / Wang, Xiao-An (author) / Zhang, Bo-Hao (author)
Engineering Structures ; 138 ; 473-489
2017-02-17
17 pages
Article (Journal)
Electronic Resource
English
Subassemblage tests and numerical analyses of buckling-restrained braces under pre-compression
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