Theoretical and experimental studies of battened buckling-restrained braces

Guo, Yan‐Lin; Zhu, Bin; Zhou, Peng; Zhang, You-Hao; Tong, Jing-Zhong

doi:10.1016/j.engstruct.2017.01.034

Cited by 31 publications

(10 citation statements)

References 17 publications

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“…In view of equation ( 5), the buckling load of the BRB is conservatively taken as the elastic buckling load P cr of the restraining system (Guo et al, 2017b). This is because the steel core is designed to exhibit full cross-sectional yielding, and hence it may have a significant stiffness degradation.…”

Section: Review Of Design Criterion Of Brbs Based On Secondorder Analysismentioning

confidence: 99%

“…To obtain safe design of a BRB, its restraining member should be capable of providing adequate lateral support for the steel core, such that global buckling failure of the BRB is prevented. The design criterion for global buckling prevention of BRBs has drawn the attention of numerous researchers (Black et al, 2004;Chou and Chen, 2010;Guo et al, 2017b;Tong and Guo, 2017;Tong et al, 2019). One of the most popular design approaches for global buckling prevention of BRBs was proposed by Fujimoto et al (1988Fujimoto et al ( , 1990, called ''restraining ratio'' approach.…”

Section: Introductionmentioning

confidence: 99%

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A new stiffness-strength-relationship-based design approach for global buckling prevention of buckling-restrained braces

Pan

Tong

2020

Advances in Structural Engineering

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This paper proposes a new stiffness-strength-relationship-based design approach that can pinpoint the target design solution for steel buckling-restrained braces (BRB). First, a stiffness–strength requirement interaction curve (the design criterion) with a very simple and easy-to-use form is derived based on a second-order analysis. This interaction curve clearly illustrates the opposing stiffness and strength requirements of the restraining system. Second, based on the geometrical parameters and material properties, a stiffness–strength relationship curve of the BRB restraining system is established. This second relationship curve is expressed by a linear function for a uniform steel BRB. By using the two analytical curves, the point of intersection defines the target design point. A straightforward design procedure for steel BRBs is then developed. A design example of steel BRBs is considered to demonstrate this easy-to-use design procedure for obtaining economical BRB designs. The design is verified and discussed by a rigorous finite element analysis.

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Section: Review Of Design Criterion Of Brbs Based On Secondorder Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A new stiffness-strength-relationship-based design approach for global buckling prevention of buckling-restrained braces

Pan

Tong

2020

Advances in Structural Engineering

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“…More recently, Z-laced built-up columns with two chords were studied in Kalochairetis et al 26 to consider the effect of initial geometric imperfections and thermally induced residual stresses. Battened built-up columns (buckling-restrained brace (BRB)) were conducted in Guo et al 27 to investigate buckling modes and their buckling loads. All the results from the experiments showed a very good agreement with finite element method.…”

Section: Introductionmentioning

confidence: 99%

Investigation on elastic compound buckling of latticed columns considering eccentricity and geometric imperfections

Wang

et al. 2019

Advances in Mechanical Engineering

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This article investigates the elastic compound buckling behavior of latticed columns with three lacing systems under two boundary conditions. Valid numerical method named SEM, that conducts buckling analysis using strain energy of bars and potential energy of chords, was built to address flexural, torsional, and flexural-torsional buckling loads along with their overall and local buckling deformations. Eurocode 3 and finite element software ABAQUS were used to validate the auxiliary of SEM. Through the research on X-lacing, E-lacing, and K-lacing latticed columns under two boundary conditions, the rigidity of bars was found to exceed a threshold value affecting the linear buckling load. When the cross-sectional area of lacing bars tends to 0 or threshold value, Eurocode 3 guidelines were imprecise in forecasting the linear buckling load. Eccentricity and geometric imperfections would decrease the buckling capacity of built-up columns substantially. The K-lacing columns respond more sensitively on local imperfections than the Xlacing and E-lacing columns under simply supported condition. However, for the columns under cantilever state, local imperfections have no significant impact for the three lacing columns. In addition, the numerical results of nonlinear buckling load and equilibrium path from SEM considering geometric imperfections are close to the output of finite element method, validating the accuracy of SEM.

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“…They also carried out investigations by changing the position of braces to beam connection on a variety of braces. Guo [8] presented a new form of buckling restrained bracing system which uses two distinct steel cores [9].…”

Section: Introductionmentioning

confidence: 99%

Seismic Behavior of Asymmetric Two-Story X-braced Frames

Olia

Saffari

Fakhraddini

2019

IJE

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A B S T R A C TConcentrically braced frames (CBFs) are one of the efficient lateral load resisting systems in high seismicity regions. One of the common problems with the use of concentrically braced frames is limitation in the architectural application and position of the openings. T wo-story X braced frames have more advantages than other configurations of concentrically braced frames, since in many cases the position of the openings due to the need for architectural spaces and executive imperfections causes the use of asymmetric X-braced frames, present study tries to evaluate the seismic behavior of asymmetric two-story X braces. In this study, the behavior of these braces has been studied. For this purpose, firstly, several symmetric two-story X braced frames are modeled by OpenSees software. Then, by changing the position of braces to beam connection, the new asymmetrical braces are obtained which initially designed. Finally, parameters such as stiffness, strength and stable hysteresis cycle of asymmetric systems are compared with symmetrical braces by nonlinear static and dynamic analysis. T he results show that if asymmetric braces are distributed symmetrically in the structure, they do not lose their ability in comparison with the symmetrical models.

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Theoretical and experimental studies of battened buckling-restrained braces

Cited by 31 publications

References 17 publications

A new stiffness-strength-relationship-based design approach for global buckling prevention of buckling-restrained braces

A new stiffness-strength-relationship-based design approach for global buckling prevention of buckling-restrained braces

Investigation on elastic compound buckling of latticed columns considering eccentricity and geometric imperfections

Seismic Behavior of Asymmetric Two-Story X-braced Frames

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