Bolts Gauge Effect on the Face Bending Behaviour of Concrete-Filled Hollow Section for Hollo-Bolted Connections

Elamin, Ahmed; Tizani, Walid; Mahmood, Mohammed

doi:10.4028/www.scientific.net/amm.773-774.105

Cited by 5 publications

(4 citation statements)

References 7 publications

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“…eliminating the flexibility of the bolts by using replica blind-bolts that are made from high-strength steel (EN24 steel). These bolts are modified version of Elamin et al (2015). The use of these bolts prevents the bolt failure mechanism and ensure as pure as possible face bending behaviour while replicating the contact areas.…”

Section: Test Specimensmentioning

confidence: 99%

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Effect of Concrete Infill and Slenderness on Column-Face Component in Anchored Blind-Bolt Connections

2020

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Previous research in blind-bolted connections to hollow columns have provided a wealth of experimental data but little was provided on parametric analytical models to guide their design. One of the connection components that requires further understanding is the column face bending. This paper presents the results and evaluation of experimental tests and finite element analyses for the bending behaviour of the column face component. Tests were conducted on full-scale connections to investigate the effect of concrete type and strength on the component. The results demonstrated that concrete strength has direct influence on the component strength and stiffness. The increase in concrete strength correlated with significant increase in the component strength.The increase in the component stiffness was less significant and is found to be limited by the column slenderness ratio (width/thickness). Slenderness ratio limits were defined beyond which the increase in concrete strength will have no effect on component stiffness. A formula for evaluating the confinement effect on the concrete infill is proposed. The strength and stiffness of the component were not affected when using self-compacting concrete while the use of light weight concrete reduced both. The failure mode of the component is bolt anchorage failure followed by a complete yielding of the column face plate around the bolts.

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Section: Test Specimensmentioning

confidence: 99%

“…6). The video gauge system was proven to provide accurate results by comparing its readings with the linear potential meter readings (Pitrakkos and Tizani 2013), and was successfully used in similar studies (Elamin et al 2015;. All displacements are in the direction of the load.…”

Section: Test Setup and Instrumentationsmentioning

confidence: 99%

Effect of Concrete Infill and Slenderness on Column-Face Component in Anchored Blind-Bolt Connections

2020

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“…Tightening torques of 190 Nm and 100 Nm were applied to the Hollo-bolts and to the long bolts, respectively. Given the availability of previous experimental data on the response of SHS faces in tension, compression and bending [11,18], as well as previous experimental research on the behaviour of blind-bolt/angle assemblages [9,16,19], focus was mainly given to the interaction between timber and steel components in this study. This was achieved by employing relatively stiff angles with different thicknesses (15 mm and 12 mm) selected in order to avoid angle failure whilst allowing for different degrees of timber-steel interaction.…”

Section: Top and Seat Bolted Angle Connections (Type 1)mentioning

confidence: 99%

Behaviour of hybrid timber beam-to-tubular steel column moment connections

Karagiannis

Mariotti

Elghazouli

2017

Engineering Structures

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This paper presents an experimental and numerical study into the response of bolted connections between Glulam timber beams and tubular steel columns. Six specimens involving two different connection types subjected to monotonically increasing bending action are examined. The first connection type incorporates top and seat angles blind-bolted to the column and jointed to the beam through long bolts. The second connection type is formed by a steel T-stub slotted into the timber beam and connected to it by means of transverse bolts. In addition, two reinforcing techniques aimed at enhancing the response of the slotted-in T-stub configuration are investigated. These include the provision of a bottom wedge angle between the beam and the column as well as the use of perpendicular-to-grain screws to delay wood splitting. The experimental set-up, connection configurations and material properties are introduced followed by a detailed account of the test results and observations. The main behavioural patterns are identified from the experiments and key response characteristics such as stiffness, capacity and failure mechanism are discussed. This paper shows that the use of bottom wedge angles leads to significant enhancement in the flexural yield strength of the T-stub connections, accompanied by a relatively small change in the location of the bolt-group point of rotation (monitored herein by means of Digital Image Correlation techniques). Besides, the use of reinforcing screws is shown to be an effective detail for substantially increasing the rotational ductility of the connections. Finite element simulations of the tests are also presented, together with a detailed description of the modelling approaches employed, in order to gain further insight into the behaviour of the connections. Finally, the applicability of simplified component-based expressions, which are suitable for practical design assessment procedures, for the estimation of the stiffness and capacity of the proposed hybrid glulam-to-tubular column connections are presented and discussed

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“…However, these bolts are mainly indicated for design nominally pinned connections that only involve transfer of vertical shear, disregarding their use under tension originated by a bending moment. Previous research carried out by several authors focused on evaluating the behaviour of blind bolts in either pure tension or shear loading (Yeomans (1998) and Wang et al (2018)), on pull-out tests of EHB and standard hollo-bolts in concrete filled sections (Pitrakkos & Tizani (2015)) and, for instance, on investigating the effect of bolt gauge on the face bending behaviour of concrete-filled SHS in connections using the hollo-bolt, Elamin et al (2015).…”

Section: Introductionmentioning

confidence: 99%

Modern Trends in Research on Steel, Aluminium and Composite Structures

Giżejowski¹,

Kozłowski²,

Chybiński³

et al. 2021

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involvement in the organisation of the 14th International Conference of Metal Structures is perceived by me as a distinction, but also as a proof of trust in the University. This activity fits perfectly the University mission to educate at all levels of higher education and in lifelong learning programs in close connection with scientific and research development. Nowadays, Poznan University of Technology offers education at 9 fac ulties, covering a total of 33 fields of study. Nearly 16,000 students study here and over 1,300 academic teachers cater to their education. The didactic offer of Poznan University of Tech nology covers the most important fields related to modern technology with a recently launched program in Artificial Intelligence; it is also well adapted to the requirements of both domestic and foreign employers. High-quality scientific research is an integral element of Poznan University of Technology strategy, characterized by scientific achievements of its employees who published more than 2,000 scientific contributions: highly ranked articles, monographs, textbooks and other publications. The total number of PUT Library collections is over 450,000 volumes. Among numerous achievements, the University is proud of the H2020 Marie Sklodowska-Curie Global Fellowships and ERC grants. Furthermore, our sci entists are among the authorities of the Polish Academy of Sciences (9 representatives) and are also members of numerous international scientific societies. According to Shanghai Rank ing 2020 edition in disciplines, PUT was classified among the best 400 universities in the world in Mechanical Engineering. Also, we are ranked by students as the most popular university in Poland according to the Ministry of Science and Higher Education in the 2020/2021 academic year.Owing to EU funding, recent years have introduced the development of research infrastruc ture at the Warta university campus. In 2020 our University also became a leader of European University EUNICEa project funded by the European Commission with a budget of more than 6 million EUR. Our university consortium partners originate from Belgium, Germany, France, Finland, Italy and Spain. EUNICE's main goal is to build a common European Uni versity of the future, and prepare its structure and management design within 3 years. EUNICE is aspiring to provide a high-quality digital learning, offering flexible and multidis ciplinary studies, as well as opportunities for students and staff for international exchange and networking. EUNICE will develop modern and innovative pedagogical methods and provide enhanced student services, in terms of enrolment, recognition, student counselling and guid ance aimed at boosting the employability of all students. Just recently, PUT was also granted by the European Commission a follow-up scientific project REUNICE. This H2020 strategic project for the European University Alliance EUNICE aims at aligning its education, research and innovation strategies through an ambitious and transformative agenda.Therefore, I am ...

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Bolts Gauge Effect on the Face Bending Behaviour of Concrete-Filled Hollow Section for Hollo-Bolted Connections

Cited by 5 publications

References 7 publications

Effect of Concrete Infill and Slenderness on Column-Face Component in Anchored Blind-Bolt Connections

Effect of Concrete Infill and Slenderness on Column-Face Component in Anchored Blind-Bolt Connections

Behaviour of hybrid timber beam-to-tubular steel column moment connections

Modern Trends in Research on Steel, Aluminium and Composite Structures

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