Numerical investigation of seismic behavior of short-core all-steel buckling restrained braces

Hoveidae, Nader; Tremblay, Robert; Rafezy, B.; Davaran, Ali

doi:10.1016/j.jcsr.2015.06.005

Cited by 54 publications

(17 citation statements)

References 19 publications

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“…The latter part of BRB was modeled using elastic-beam-column element which represents the brace end-connection part and also non-yielding portion of the core plates. Based on the previous studies, in a common BRB, the length of yielding part of the core segment is approximately equal to 50% of work-point to work-point length of the brace [16].…”

Section: Description Of 2d Models In Openseesmentioning

confidence: 92%

“…Hoveidae et al [16] proposed a new type of buckling restrained brace, called short-core all-steel buckling restrained brace, in which a shorter core component was serially connected to a semi rigid non-yielding member. The results of extensive nonlinear time history analyses showed that the short-core BRBs (SCBRB) can considerably reduce the residual drifts of BRBFs.…”

Section: Introductionmentioning

confidence: 99%

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Numerical Investigation of Seismic Response of Hybrid Buckling Restrained Braced Frames

Hoveidae

2018

Period. Polytech. Civil Eng.

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The Conventional buckling restrained braces used in concentrically braced frames are expected to yield in both tension and compression without major degradation of capacity under severe seismic ground motions. One of the weakness points of a standard buckling restrained braced frame is the low post-yield stiffness and thus large residual deformation under moderate to severe ground motions. This phenomenon can be related to the low post-yield stiffness of the core segment in comparison to its elastic stiffness. This paper investigates the application of stainless steel as the core material in a hybrid buckling restrained brace. The “hybrid” term arises from the use of more than one core component with different steel materials, including high strength high-performance steel and stainless steel (304L) with high strain hardening in the core of buckling restrained brace. Nonlinear dynamic time history analyses were conducted on a variety of diagonally braced frames with different heights, in order to compare the seismic performance of standard (non-hybrid) and hybrid buckling restrained braced frames. The results showed that the proposed hybrid buckling restrained braces reduce the inter-story and specially the residual drift demands in buckling restrained braced frames.

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Section: Description Of 2d Models In Openseesmentioning

confidence: 92%

Section: Introductionmentioning

confidence: 99%

Numerical Investigation of Seismic Response of Hybrid Buckling Restrained Braced Frames

Hoveidae

2018

Period. Polytech. Civil Eng.

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“…Xie et al [20] proposed a type of weld-free all-steel BRBs, in which the core member is fabricated absolutely in high-strength bolts without any weld, and a high CPD could be seen in the lowcycle fatigue tests. Besides, Hoveidae et al [21] numerically studied the seismic behavior of short-core all-steel BRB (SCBRB), in which the relationship between the ductility demand and the core length was analyzed. Vafaei and Eskandari [22] studied on the seismic response of BRBs subjected to the fling step and forward directivity near-fault ground motions and confirmed that the near-fault ground motions imposed higher demands on the structures.…”

Section: Introductionmentioning

confidence: 99%

Analysis of the Seismic Demand of High‐Performance Buckling‐Restrained Braces under a Strong Earthquake and Its Aftershocks

Xie

Huang

et al. 2019

Advances in Civil Engineering

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The analysis of the ductility and cumulative plastic deformation (CPD) demand of a high-performance buckling-restrained brace (HPBRB) under a strong earthquake and its aftershocks is conducted in this paper. A combination of three continuous excitations with the same ground motion is used to simulate the affection of a strong earthquake and its aftershocks. A six-story HPBRB frame (HPBRBF) is taken as an example to conduct the incremental dynamic analysis (IDA). The seismic responses of the HPBRBF under one, two, and three constant continuous ground motions are compared. The IDA result indicates that the ductility and CPD demand of the BRBs under the three constant continuous ground motions are significantly larger than that excited by only one. Probabilistic seismic demand analysis (PSDA) is performed using seven near-fault ground motions and seven far-fault ground motions to consider the indeterminacy of ground motion. The probabilistic seismic demand curves (PSDCs) for the ductility and CPD demand for the HPBRB under the strong earthquake and its aftershocks are obtained in combining the probabilistic seismic hazard analysis. The results indicate that the AISC threshold value of the CPD with 200 is excessively low for a HPBRBF which suffers the continuous strong aftershocks with near-fault excitations, and a stricter threshold value should be suggested to ensure the ductility and plastic deformation capacity demand of the HPBRB.

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“…Increasing the cost of buildings is the main disadvantage of self-centering systems. Hoveidae et al (2015) studied a new type of BRB, in which a shorter core component was serially connected to a semi-rigid non-yielding member. They showed that the short-core BRBs can considerably reduce the residual drifts of BRBFs.…”

Section: Introductionmentioning

confidence: 99%

Numerical comparison on the efficiency of conventional and hybrid buckling-restrained braces for seismic protection of short-to-mid-rise steel buildings

Alborzi

Tahghighi

Azarbakht

2019

Int J Adv Struct Eng

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Buckling-restrained brace (BRB) is a specific kind of bracing system which has an acceptable energy dissipation behavior in a way that would not be buckled in compression forces. However, considerable residual deformations are noticed in strong ground motions as a result of the low post-yield stiffness of the BRBs. The seismic performance of a modern lateral load resisting system, which is called the hybrid BRB, and its conventional counterpart are assessed and compared in this paper. Multiple plates with different stress-strain behavior are used in the core of this new innovative system, and this is its difference with the existent BRBs. Nonlinear static and incremental dynamic analyses are carried out for three building frames with different structural heights, which use conventional and hybrid BRB systems. To carry out response history analyses, the FEMA P695 far-field earthquake record set was adopted in different hazard levels. The hybrid BRBs are shown to have superior seismic performance in comparison with the conventional systems based on the response modification factor and the damage measures including residual displacements and inter-story drift ratios.

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Numerical investigation of seismic behavior of short-core all-steel buckling restrained braces

Cited by 54 publications

References 19 publications

Numerical Investigation of Seismic Response of Hybrid Buckling Restrained Braced Frames

Numerical Investigation of Seismic Response of Hybrid Buckling Restrained Braced Frames

Analysis of the Seismic Demand of High‐Performance Buckling‐Restrained Braces under a Strong Earthquake and Its Aftershocks

Numerical comparison on the efficiency of conventional and hybrid buckling-restrained braces for seismic protection of short-to-mid-rise steel buildings

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