Local and global buckling condition of all-steel buckling restrained braces

Mirtaheri, Masoud; Nazeryan, Meissam; Bahrani, Mohammad Kazem; Nooralizadeh, Amin; Montazerian, Leila; Naserifard, Mohamadhosein

doi:10.12989/scs.2017.23.2.217

Cited by 20 publications

(6 citation statements)

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“…However, the method in this paper is derived only based on a sensitivity analysis of a single degree of freedom (SDOF) system. And a wide validation, using the nite element model analysis, needs further investigation when the method is applied to the di erent types of speci c multidegree of freedom (MDOF) structures [42,43] in the future.…”

Section: Discussionmentioning

confidence: 99%

Parameter Optimization of a Vertical Spring‐Viscous Damper‐Coulomb Friction System

Wei

Zhuo

et al. 2019

Shock and Vibration

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A vertical spring-viscous damper-concave Coulomb friction isolation system was firstly proposed, and their parameters were firstly optimized to achieve the best performance under earthquakes. An incremental dynamic analysis method (IDA) and a performance-based assessment framework were used to calculate the system and assess its seismic vulnerability, respectively. Results show that both the friction force and the horizontal component of spring force gradually increase when an earthquake enforce the isolator to slide from its central location. Although other papers propose that an increase of spring force and a decrease of friction force can reduce the structural residual displacement, this paper can minimize the residual displacement value to be 0 by using a super lubrication in the middle of contact surface and a variable increment ratio of concave friction distribution. The reason is that the horizontal component of spring force is always greater than the friction force within any relative displacement between the structure and the ground in this paper. As for the peak relative displacement and peak acceleration of structure, one is reduced while the other is increased when selecting the optimal isolation parameters. If the structure is very sensitive to the acceleration response, a low friction parameter, a small spring constant, and a small and even zero damping constant could be adopted to yield a small peak acceleration of system. The tightness of vertical spring can be adjusted to be appropriately loose to continuously reduce the structural acceleration response.

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Section: Discussionmentioning

confidence: 99%

Parameter Optimization of a Vertical Spring‐Viscous Damper‐Coulomb Friction System

Wei

Zhuo

et al. 2019

Shock and Vibration

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“…proposed BRBs with all-steel composition and conducted experimental and numerical studies (Guo et al 2016;Guo et al 2017a, b;Hosseinzadeh and Mohebi 2016;Jia et al 2017;Judd et al 2016;Mirtaheri et al 2017). The all-steel BRB is mainly characterized by a steel core with a circular section or H-section and a restraining member of a circular or square steel tube.…”

Section: Nomenclaturementioning

confidence: 99%

Cyclic experiments and global buckling design of steel-angle-assembled buckling-restrained braces

Tong

Zhang

Guo

et al. 2022

Bull Earthquake Eng

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Compared with traditional BRB, the steel-angles-assembled buckling-restrained brace (SAA-BRB) is an innovative BRB with light-weight, accurate control of the geometrical dimensions, easy installation and convenient disassembly. The SAA-BRB is composed of an external restraining system and a cruciform-sectional inner core. The external restraining system is assembled by four steel angles with the connection of high-strength bolts, and the spacers are installed between the inner core and the restraining system. In this study, the hysteretic behavior of SAA-BRB was investigated by experiments and finite element (FE) simulations. Firstly, three SAA-BRB specimens with different restraining ratios were tested under cyclic loads to investigate the hysteretic performance. It was found that all specimens exhibited stable responses and satisfactory energy-dissipating capabilities during the whole loading process. Then, a refined FE model was established, and its validity in predicting the hysteretic responses of SAA-BRB was verified by the experiments. Moreover, based on the yielding criteria of the outmost fiber for the restraining member section, a design formula for the restraining ratio requirements to avoid global buckling of the SAA-BRB was deduced.Finally, extensive parametric analysis was conducted to verify the accuracy of the design formula by changing the geometric dimensions (the restraining ratio) of models. It was found that the proposed formula for the restraining ratio requirement could lead to a conservative prediction with reasonable accuracy, thus providing valuable references for global buckling design of SAA-BRBs in engineering practice.

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“…In Japan large construction companies have developed their facilities and invested in research on RCS systems. As a result, a large number of beam-to-column details have been proposed to implement this system so far [8][9][10]. These systems are typically based on standards published by the Japan Institute of Architecture [11] and the Japan Building Center (BCJ).…”

Section: Introductionmentioning

confidence: 99%

Seismic Evaluation of the Cheng and Chen Modified Model Using Shear Keys in Steel Beam-to-Concrete Column Connections

Nazeryan¹,

Feizbahr²

2022

CRPASE

Self Cite

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Frames consisting of composite reinforced concrete and steel (RCS) have been considered as structural systems for several years. This system benefits from the advantages of both systems by optimally combining steel and concrete structural elements. These connections are of two types, which include connections with a through-beam and connections with a through column. In this research, the laboratory model of previous studies has been simulated in ABAQUS finite element software and the seismic performance of RCS joints under cyclic loads and uniform loads was investigated. After validating the finite element model, a parametric study (checking the thickness of the steel panel in the joint area, checking the thickness of the cover sheet, etc.) was performed. Finally, after comparing the results of this type of connection, a modified model was presented which, in addition to increasing the capacity, shows a much more stable and desirable behavior.

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Local and global buckling condition of all-steel buckling restrained braces

Cited by 20 publications

References 0 publications

Parameter Optimization of a Vertical Spring‐Viscous Damper‐Coulomb Friction System

Parameter Optimization of a Vertical Spring‐Viscous Damper‐Coulomb Friction System

Cyclic experiments and global buckling design of steel-angle-assembled buckling-restrained braces

Seismic Evaluation of the Cheng and Chen Modified Model Using Shear Keys in Steel Beam-to-Concrete Column Connections

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