Experimental Investigation of Aluminum Alloy and Steel Core Buckling Restrained Braces (BRBs)

Avci-Karatas, Cigdem; Celik, Oguz C.; Yalçın, Cem

doi:10.1007/s13296-018-0025-y

Cited by 32 publications

(10 citation statements)

References 25 publications

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“…The plastic zone length was 1251 mm (plastic zone length ratio: 53 %). In the selection of these parameters, the case of medium-and lowrise buildings with braces subjected to horizontal forces causing shear deformation was assumed, as was done in previous studies [6]. When the specimen is placed at an inclination of 45° and the plastic zone length ratio of the specimen is taken to be about 50 % considering the total length of the specimen (2351 mm), the plastic zone length of axial strain generated in the core plate is almost equal to the inter-storey deformation angle.…”

Section: Articlementioning

confidence: 99%

“…Owing to their stable hysteresis characteristics, such braces are widely used as earthquake-resistant members in medium-and low-rise buildings, as seismic-response control members in high-rise and super high-rise buildings, and in sustainable buildings. Several combinations of core plates and restraining parts with various crosssectional shapes have been proposed, and the performance of BRBs has been experimentally confirmed for each shape [3][4][5][6].…”

Section: Introductionmentioning

confidence: 99%

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Effects of the clearance between the core plate and restraining part on the structural performance of the buckling‐restrained brace using steel mortar planks

et al. 2022

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The clearance between the core plate and the restraining part of the buckling-restrained brace using steel mortar planks (BRBSM) considerably affects the failure mode and hysteretic characteristics of the brace. A clearance adjustment construction is proposed for the BRBSM which can control the clearance through partially pasting clearance adjustment materials and polishing the mortar plank surface. First, the clearance adjustment construction workflow and quality control are demonstrated, and it is verified that the clearance can be assured by fabricating specimens. Further, the effects of the difference in clearance between the core plate and restraining part on the structural performance of the BRBSM in terms of failure behaviour, increase strength ratio, buckling mode and cumu lative plastic strain energy ratio are evaluated by conducting a cyclic axial loading test.

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Section: Articlementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Effects of the clearance between the core plate and restraining part on the structural performance of the buckling‐restrained brace using steel mortar planks

et al. 2022

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“…Approximate symmetric behavior of BRBs under tension and compression and their feature of not causing any degradation in terms of stiffness and strength as well as obtaining stable hysteretic curves expand their area of use. Furthermore, when compared to other alternative seismic energy dissipation systems, BRBs have several advantages such as easy replacement following an earthquake (if needed), easy construction with relatively low cost and simple end connection details [2][3][4].…”

Section: Introductionmentioning

confidence: 99%

“…Chou and Chen [13] utilized a gap size of 1.5 mm between the steel core and concrete. Avcı-Karatas et al [2] used 1.5 mm for gap size between aluminum/steel core and concrete encasing. A gap size of 1.5 mm between the steel core and steel encasing was utilized by Guo et al [9].…”

Section: Introductionmentioning

confidence: 99%

The Effects of Steel Core Imperfection, Gap Size and Friction Coefficient on the Behavior of All-Steel Buckling Restrained Braces

Özkılıç

2021

Düzce Üniversitesi Bilim Ve Teknoloji Dergisi

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Buckling restrained braces (BRBs) which are generally composed of a steel core and a encasing(buckling restrainers) are utilized to resist lateral forces in high seismic regions since BRBs exhibit high energy dissipation capacity, ductility and stiffness. The steel core carries both compressive and tensile forces. During the compression, the core starts buckling and the encasing tries to prevent this buckling. However, due to the unbonding layer/gap between the encasing and steel core, the steel core eventually buckles and contacts with the encasing. Buckling phenomenon is also associated with the initial imperfection and gap size. In this study, the effects of the initial imperfectionof steel core, gap size (1-5 mm)and friction coefficient (0.01-0.5)between the encasing and steel core on the behavior of BRBs are investigated. Pursuant to this goal, numerical analyses using a finite element tool ABAQUS were conducted. A total of 19 numerical models were developed and monotonically loaded. Initial imperfection was implemented to the models using buckling mode shapes.The results revealed that increasing gap size leads to a reduction in load-carrying capacity. It is recommended to keep gap sizes between 1 and 2 mm. On the other hand, initial imperfection does not significantly affect load-carrying capacity and global behavior. However, it was also observed that the fluctuations in load increase as the amplitude of the mode shape and gap size increase. Moreover, the friction coefficient should be kept between 0.01 and 0.05; otherwise, undesired behaviors can be observed.

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“…So far, to the knowledge of the authors, such comprehensive data assessed here are unique and beneficial for the studies on the hazard and risk assessment strategies to mitigate seismic damage in 29%-66% possible strong earthquake (Mw≥7.0) affecting the south of Istanbul with rupturing beneath the sea of Marmara in the next 14 years [18][19]. When viewed from this aspect, this work will be a remarkable contribution to the existing knowledge base for the engineers about the estimation of buildings damage levels after a large-scale earthquake disaster [20][21][22][23][24][25].…”

Section: Introductionmentioning

confidence: 99%

Urban Transformation Progress of Reinforced Concrete (Rc) and Masonry-Mixed Buildings in Istanbul

Avci-Karatas

Çatalkaya²

2021

Eskişehir Technical University Journal of Science and Technology a - Applied Sciences and Engineering

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Istanbul city is the center of increasing industrialization in Turkey with proportionally developing problems, such as distorted settlements, and slums, etc. The rapid migration to Istanbul, which is located in the earthquake hazard risk zone, has resulted in a raised population and these structures. Urban regeneration/transformation/planning is expressed as a comprehensive action plan that aims to provide a lasting solution to be economic, physical, social, and environmental conditions of a diverting region to solve the problems in the cities. This paper analyzes the urban transformation process and applications of reinforced concrete (RC) and masonry or mixed masonry-RC buildings in Istanbul within the scope of the urban planning law called "Law on Transformation of Areas at Risk of Natural Disaster" (Law No. 6306 dated 2012). To reach this goal, a total of 400 risky building forms with 150 RC buildings as well as 250 masonry-mixed buildings considered according to Law No. 6306 is compiled and evaluated as risky building data. The general characteristics of the RC and masonry-mixed buildings in Istanbul are determined by a date range of such as 2012-2020. With the results obtained from the paper, significant contributions have been made to the knowledge and technological capabilities at the international/national level.

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Experimental Investigation of Aluminum Alloy and Steel Core Buckling Restrained Braces (BRBs)

Cited by 32 publications

References 25 publications

Effects of the clearance between the core plate and restraining part on the structural performance of the buckling‐restrained brace using steel mortar planks

Effects of the clearance between the core plate and restraining part on the structural performance of the buckling‐restrained brace using steel mortar planks

The Effects of Steel Core Imperfection, Gap Size and Friction Coefficient on the Behavior of All-Steel Buckling Restrained Braces

Urban Transformation Progress of Reinforced Concrete (Rc) and Masonry-Mixed Buildings in Istanbul

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