Replaceable fuse buckling-restrained brace (BRB): Experimental cyclic qualification testing and NLFEA modeling

Al-Sadoon, Zaid A.; Karzad, Abdul Saboor; Sagheer, Abdullah; AlHamaydeh, Mohammad

doi:10.1016/j.istruc.2022.03.081

Cited by 20 publications

(10 citation statements)

References 24 publications

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“…The experimental and finite element modeling data obtained and presented in this paper investigate the behavior of buckling-restrained braces (BRBs) that can be used in designing and manufacturing BRBs for employment in seismic deficient structures. The data were extracted from laboratory experiments and finite element modeling results, which are discussed in detail by authors in a research manuscript titled Replaceable Fuse Buckling-Restrained Brace (BRB): Experimental Cyclic Qualification Testing and NLFEA Modeling [10]. The experiments were conducted on small-scale buckling-restrained braces (BRBs) using an Instron hydraulic actuator.…”

Section: Discussionmentioning

confidence: 99%

Experimental and Nonlinear Finite Element Analysis Data for an Innovative Buckling Restrained Bracing System to Rehabilitate Seismically Deficient Structures

Karzad

Al-Sadoon

Sagheer

et al. 2022

Data

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This article presents experimental data and nonlinear finite element analysis (NLFEA) modeling for an innovative buckling restrained bracing (BRB) system. The data were collected from qualification testing of introduced BRBs per the AISC 341 test provision and finite element modeling. The BRB is made of three parts: core bar, restraining unit, and end units, in which duplicates of three different core bar cross sections (i.e., fully threaded, threaded notched, and smooth shaved) were tested. The BRBs introduced in this research come with innovative end parts, so-called fingers. These fingers provide the longitudinal gap required in every BRB system and simultaneously prevent buckling of the core bar at the end regions at both ends of the BRB sample, thus facilitating an easy core replacement if it gets damaged in the event of an earthquake. The measured parameters were the applied cyclic load and the corresponding displacement. Analysis of the acquired data illustrated an almost symmetric hysteric behavior with a little higher capacity under compression but a noticeable overall ductility of 4. Moreover, finite element modeling data for one type of core bar (fully threaded) were curated. The data presented in this paper will be valuable for fabricating BRBs in practice and further research on the topic considered.

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Section: Discussionmentioning

confidence: 99%

Experimental and Nonlinear Finite Element Analysis Data for an Innovative Buckling Restrained Bracing System to Rehabilitate Seismically Deficient Structures

Karzad

Al-Sadoon

Sagheer

et al. 2022

Data

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“…However, their supporting effects were replicated by applying fixed rotational and translational conditions at the ends of the boundary plates in connection with the gusset plate (Figure 7). The cyclic load was applied, as a displacement‐controlled mode following the ATC 24 18 protocol, to the leading end of the middle plate as shown in Figure 7. The steel material was modeled with a bilinear hardening plasticity model whose input parameters, namely, F y , E s , and v , are the ones reported in Section 2.1.…”

Section: Numerical Studymentioning

confidence: 99%

“…During the last decades, some ideas have been formulated to develop and improve the behavior of the CBF system. Examples of the various proposed metallic dampers include the following: Added Damping and Added Stiffness (ADAS) 6 ; Triangular ADAS 7 ; shear‐flexural dampers, 8,9 shear‐flexural yielding hinges in the central yielding dampers, 10 shear dampers that typically come in three types; vertical shear link, 11,12 links that are indirectly 13,14 or directly 15,16 attached to the diagonal member of CBF; U‐shaped damper 17 ; and BRB system 18,19 …”

Section: Introductionmentioning

confidence: 99%

“…Examples of the various proposed metallic dampers include the following: Added Damping and Added Stiffness (ADAS) 6 ; Triangular ADAS 7 ; shear-flexural dampers, 8,9 shear-flexural yielding hinges in the central yielding dampers, 10 shear dampers that typically come in three types; vertical shear link, 11,12 links that are indirectly 13,14 or directly 15,16 attached to the diagonal member of CBF; U-shaped damper 17 ; and BRB system. 18,19 Although majority had shown good performance in labs and numerical studies as well as in past earthquakes, the main problem in most proposed damping devices is their high cost when applied in small to moderate structures. Comparatively, shear dampers are more economical than other types of metallic dampers.…”

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confidence: 99%

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Improving the behavior of concentrically braced frame braces using a flexural damper: Experimental and numerical study

Jeong,

Ghamari,

Jawdhari

2023

Structural Design Tall Build

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SummaryAlthough the concentrically braced frames (CBFs) systems have high lateral elastic stiffness and strength, they reflect a low seismic energy absorption capacity mainly due to their diagonal buckling under compressive loading. To overcome this problem, researchers have proposed metallic shear damper as the most popular due to its satisfactory performance and affordable cost. In this paper, an innovative metallic damper with a flexural mechanism is proposed to improve the behavior of CBF systems. It provides ease of fabrication and replacement after damage, competitive cost, and improved resistance to buckling of the CBF member. The performance of the damper was evaluated experimentally and numerically. Subsequently, two types of dampers, (a) made of rectangular flexural plates (RFP) and (b) made of I‐shaped flexural plates (IFP), were designed and evaluated. Experimental as well as numerical results indicated that both dampers provide stable and symmetrical hysteresis curves with a high energy absorption capacity. Results indicated that the IFP damper has greater stiffness (1.94–2.3 times) and ultimate strength (1.76 times) but a lower overstrength (66% less) and ductility (47% less) than the RFP damper. Moreover, design expressions were presented for the proposed damper and showed a good agreement with finite element results.

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“…Among the steel dampers proposed so far, including ADAS [1], TADAS [2], flexural dampers [3,4], BRB [5], semi-BRB [6], and other types of them, the shear damper is highly accepted due to its ease of construction and installation as well as its low cost. Therefore, this article deals with improving the performance of an I-shaped shear damper, which is shown in Figure 1.…”

Section: Introductionmentioning

confidence: 99%

An innovative I‐shaped low‐yield steel shear damper directly connected to the concentrically braced frame

Kontoni,

Ghamari,

Kheiri

et al. 2023

ce papers

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Shear dampers are known as famous seismic passive energy devices due to their suitable performance against seismic loading to improve the behavior of Concentrically Braced Frames (CBFs). The CBF system suffers from low ductility due to its compression member's susceptibility to buckling. By adding the shear dampers directly to the diagonal element members of the CBF, the dampers prevent the bucking of the CBF and improve the behavior of the system. Although the dampers pertain to high energy dissipation capacity, they reduce the ultimate strength and elastic stiffness of the system. To overcome the shortcoming, in this paper, utilizing low‐yield point steel to create an I‐shaped damper is proposed and investigated parametrically and numerically by the Finite Element Method (FEM). This damper is directly connected to the CBF's diagonal member. The results indicated that by using the proposed I‐shaped damper, the ultimate strength, elastic stiffness, and energy dissipation of the system are enhanced. Also, the damper prevents the bucking of the CBF, which causes the damages to be limited in the damper, and the CBF to remain in the elastic zone. Also, required equations were suggested to design the system.

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Replaceable fuse buckling-restrained brace (BRB): Experimental cyclic qualification testing and NLFEA modeling

Cited by 20 publications

References 24 publications

Experimental and Nonlinear Finite Element Analysis Data for an Innovative Buckling Restrained Bracing System to Rehabilitate Seismically Deficient Structures

Experimental and Nonlinear Finite Element Analysis Data for an Innovative Buckling Restrained Bracing System to Rehabilitate Seismically Deficient Structures

Improving the behavior of concentrically braced frame braces using a flexural damper: Experimental and numerical study

An innovative I‐shaped low‐yield steel shear damper directly connected to the concentrically braced frame

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