Effects of Buckling-Restrained Braces on reinforced concrete precast models subjected to shaking table excitation

Guerrero, Héctor; Ji, Tianjian; Escobar, J. Alberto; Terán‐Gilmore, Amador

doi:10.1016/j.engstruct.2018.02.055

Cited by 38 publications

(15 citation statements)

References 22 publications

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“…Furthermore, the use of shim plates with stiffeners are recommended to avoid out-of-plane deformation in the connection. As an example, in Guerrero et al (2018a), angle profiles were used as shim plates on an experiment to connect the proposed BRB to a reinforced concrete structure subjected to shaking table action. It was seen that the connections performed adequately.…”

Section: Connection To Hosting Structurementioning

confidence: 99%

Experimental Behaviour of a Low-Cost Seismic Energy Dissipation Device

Bobadilla¹,

Romero²,

Sánchez³

et al. 2020

RIS

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Safety during earthquakes should be a human right and shall be accessible not only to those who can pay for proprietary high-tech devices but to everyone. Based on that, this study has been developed with the intention of helping to improve the seismic safety in the developing world. Within this paper, a low-cost, low-tech seismic energy dissipation device is proposed. Its experimental behavior under seismic loading is assessed. The device type is buckling-restrained brace (BRB) and, according to its characteristics, it is suitable for new and existing, medium- to low-rise structures. First, the device characteristics and fabrication process are presented. Then, its structural response, in terms of the hysteretic behavior, ductility, and dissipated energy – as obtained from experimental tests – is shown. Experimental results show an excellent behavior of the proposed device. As a result, it can be said that the device is reliable and its use is recommended for new, and retrofitting/upgrading existing, structures. Design recommendations are also provided.

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Section: Connection To Hosting Structurementioning

confidence: 99%

Experimental Behaviour of a Low-Cost Seismic Energy Dissipation Device

Bobadilla¹,

Romero²,

Sánchez³

et al. 2020

RIS

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“…e displacement on traditional concrete buildings can be reduced by means of concentrically braces. e objective of the braces in structural frames is to increase the stiffness and to reduce the lateral displacements due to earthquakes [2,3]. In spite of the advantages of typical braced frames, several studies have highlighted that frequent damage has been observed on this type of structural system in past earthquakes such as the 1985 Mexico earthquake, 1989 Loma Prieta earthquake, 1994 Northridge earthquake, and 1995 Hyogo-ken Nanbu earthquake, among others [4][5][6][7][8][9], as it was indicated by Sabelli et al [10].…”

Section: Introductionmentioning

confidence: 99%

Enhanced Seismic Structural Reliability on Reinforced Concrete Buildings by Using Buckling Restrained Braces

Baca

Bojórquez

Leyva

et al. 2021

Shock and Vibration

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The control of vibrations and damage in traditional reinforced concrete (RC) buildings under earthquakes is a difficult task. It requires the use of innovative devices to enhance the seismic behavior of concrete buildings. In this paper, we design RC buildings with buckling restrained braces (BRBs) to achieve this objective. For this aim, three traditional RC framed structures with 3, 6, and 9 story levels are designed by using the well-known technique nondominated sorting genetic algorithm (NSGA-II) in order to reduce the cost and maximize the seismic performance. Then, equivalent RC buildings are designed but including buckling restrained braces. Both structural systems are subjected to several narrow-band ground motions recorded at soft soil sites of Mexico City scaled at different levels of intensities in terms of the spectral acceleration at first mode of vibration of the structure Sa(T1). Then, incremental dynamic analysis, seismic fragility, and structural reliability in terms of the maximum interstory drift are computed for all the buildings. For the three selected structures and the equivalent models with BRBs, it is concluded that the annual rate of exceedance is considerably reduced when BRBs are incorporated. For this reason, the structural reliability of the RC buildings with BRBs has a better behavior in comparison with the traditional reinforced concrete buildings. The use of BRBs is a good option to improve strength and seismic behavior and hence the structural reliability of RC buildings subjected to strong earthquake ground motions.

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“…Hector et al [12] studied the effect of BRB on reinforced concrete precast structures, using shaking table experiments and the results showed that inclusion of BRB increased shear capacity, damping and fundamental natural frequency and reduced interstory drift and lateral displacement when subjected to low intensity and high intensity ground motions.…”

Section: Introductionmentioning

confidence: 99%

Research on Application of Buckling Restrained Braces in Strengthening of Concrete Frame Structures

et al. 2020

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This paper examines the application of BRB in strengthening of reinforced concrete frame structures to meet seismic requirements according to Chinese seismic design code. Elastic response spectrum analysis and nonlinear time history analysis are performed by taking a real engineering example that suffers weak first floor irregularity due to added loads and addition of one floor. With the method of equivalent stiffness and displacement-based design method, buckling restrained brace parameters are deduced and are used to model BRB in ETABS using plastic wen model. Three configurations of buckling restrained braces are studied together with ordinary braces. Under elastic state, the relationship between the required cross section area of BRB and ordinary braces is deduced from the formula of calculating elastic bearing capacity where it is shown that the area of the ordinary braces must be 1.25 times that of BRB for ensuring the same performance. The results show that Inverted V brace configuration demonstrated better performance over single brace and V brace configurations and X brace configuration, although not recommended by Chinese code, is simulated and used in this paper and has demonstrated better performance over other configurations, and the further research on the practical use of this brace is recommended. Also, under action of strong earthquakes, by nonlinear time history analysis, buckling restrained braces demonstrated better performance of strengthening the structure and make it meet the requirement of code. Under this same condition, ordinary braces losses their bearing capacity due to excessive buckling.

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Effects of Buckling-Restrained Braces on reinforced concrete precast models subjected to shaking table excitation

Cited by 38 publications

References 22 publications

Experimental Behaviour of a Low-Cost Seismic Energy Dissipation Device

Experimental Behaviour of a Low-Cost Seismic Energy Dissipation Device

Enhanced Seismic Structural Reliability on Reinforced Concrete Buildings by Using Buckling Restrained Braces

Research on Application of Buckling Restrained Braces in Strengthening of Concrete Frame Structures

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