Global buckling prevention of reduced-core-length buckling-restrained braces: theoretical and numerical investigations

Tong, Jing-Zhong; Guo, Yan‐Lin; Pan, Wenhao; Shen, M.H.; Zhou, Peng

doi:10.1007/s10518-019-00768-0

Cited by 12 publications

(5 citation statements)

References 29 publications

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“…Analyzing cable impact on the composite beam involves a static analysis with the following assumptions and conditions [43][44][45]:…”

Section: Assumptionsmentioning

confidence: 99%

Optimal Design of a Novel Large-Span Cable-Supported Steel–Concrete Composite Floor System

Tan,

Wu,

Pan

et al. 2023

Buildings

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This paper optimizes the design of a novel large-span cable-supported steel–concrete composite floor system in a simply supported single-span, single-strut configuration, aiming for cost-effective solutions and minimal steel consumption. The optimization considers various cross-sectional dimensions, adhering to building standards and engineering practices, and is based on a non-linear programming (NLP) algorithm. Parameters of live loads ranging from 2 to 10 kN/m2 and spans from 20 to 100 m are considered. The optimization results show that cable-supported composite floors with a single strut exhibit robust economic feasibility for spans of less than 80 m and live loads under 8 kN/m2. Compared to conventional composite floors with welded I-beams, the cable-supported system offers more cost-effective cross-sections and reduces steel consumption. The savings in economically equivalent steel consumption range from 20% to 60%. Discussion on the area ratio of cables to steel beam in the optimal cross-section reveals that the secondary load-bearing system (i.e., bending of the main beam with an effective span length of L/2) may require more steel in cases of ultra-large spans. Therefore, the economical efficiency of cable-supported composite beams with multiple struts and smaller effective span lengths warrants further exploration in future studies.

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“…Analyzing cable impact on the composite beam involves a static analysis with the following assumptions and conditions [43][44][45]:…”

Section: Assumptionsmentioning

confidence: 99%

Optimal Design of a Novel Large-Span Cable-Supported Steel–Concrete Composite Floor System

Tan,

Wu,

Pan

et al. 2023

Buildings

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“…Generally, the BRB is composed of an inner steel core encased by an external restraining system. The inner core is used to bear the axial load, and the external member is used to limit the lateral displacement of the inner core to prevent it from global buckling (Tong et al 2020). In the design of BRB, the inner core should reach its fullsectional yield load without undergoing global buckling/local failure mode, ensuring the excellent load-carrying performance and energy-dissipating capacity of BRBs (Black et al 2004;Eryasar and Topkaya 2010;Kiggins and Uang 2006;Tong and Guo 2018).…”

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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“…For RC columns reinforced with HSSB, the HSSB endures higher compression 401 stress, and is prone to buckling under axial compression and hysteretic loading [39]. 402 As a result, the collapse capacity of the members will decrease rapidly after 403 buckling.…”

Section: Effect Of Buckling On Seismic Capacity Of Hsc-hssb Columnmentioning

confidence: 99%

Theoretical Procedure and Empirical Models to Fast Estimate Seismic Ductility of HSC-HSSB Column Considering Buckling

Zhong

2022

Preprint

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The collapse resistance of reinforced concrete (RC) columns with high-strength concrete and high strength steel bar (HSC-HSSB) considering the buckling effect of longitudinal bars is investigated. A theoretical procedure is proposed in this paper, which can convert the discrete longitudinal reinforcement and the two-dimensional fiber section into a uniform ‘steel ring’ and a one-dimensional model with the thickness information of each material. The variable interval integration approach is used to significantly improve the procedure efficiency, and accuracy of procedure is verified by the existed experimental data. On this basis, the massive data sample of collapse capacity considering buckling is efficiently obtained to propose an empirical mathematical model. Through this model, the influence of the crucial factors on collapse performance are further quantitatively analyzed, which would significantly facilitate the development of appropriate preliminary designs. The analysis results reflect that ultimate limit curvature and curvature ductility decrease when considering bar buckling (ϕuB), and the model quantitatively reflects this phenomenon is derived. The limit curvature without considering buckling (ϕu) is about twice as large as ϕuB, and with the increase of fco and fy, effect of buckling is becoming increasingly apparent.

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Global buckling prevention of reduced-core-length buckling-restrained braces: theoretical and numerical investigations

Cited by 12 publications

References 29 publications

Optimal Design of a Novel Large-Span Cable-Supported Steel–Concrete Composite Floor System

Optimal Design of a Novel Large-Span Cable-Supported Steel–Concrete Composite Floor System

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

Theoretical Procedure and Empirical Models to Fast Estimate Seismic Ductility of HSC-HSSB Column Considering Buckling

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