Experimental and numerical behaviour of blind bolted flush endplate composite connections

Waqas, Rumman; Uy, Brian; Thai, Huu‐Tai

doi:10.1016/j.jcsr.2018.10.012

Cited by 29 publications

(9 citation statements)

References 19 publications

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“…They stated that the new modification improved the bolt strength and stiffness significantly. The recent research in the area of blind bolting connections confirmed that these fasteners have the ability to provide rigid connections Waqas et al 2019). This finding and the advantages of blind bolting connections (easier and faster fabrication, lower cost and higher stability compared with welded connections) highlight the need for the development of design guidance for moment resisting blind bolting connections to tubular sections.…”

Section: Introductionmentioning

confidence: 90%

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: Introductionmentioning

confidence: 90%

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

2020

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“…Meanwhile, considerable in situ welding or complicated embedded components are required for most rigid beam-to-column joints, and brittle fractures of welded connections were found during the post-earthquake survey [14]. To avoid the need of in situ welding and ensure the connection reliability, the blind bolted end plate joints to CFT columns with the advantage of installation on one side were proposed and tested by many researchers, such as Wang et.al [15,16], Ataei et.al [17], Wang et.al [18], Tao et.al [19,20] and Waqas et.al [21]. The analytical results [15][16][17][18][19][20][21] showed that properly designed blind bolted joints exhibited semi-rigid characteristics with relatively high initial stiffness, large rotation capacity and good ductility.…”

Section: Introductionmentioning

confidence: 99%

“…To avoid the need of in situ welding and ensure the connection reliability, the blind bolted end plate joints to CFT columns with the advantage of installation on one side were proposed and tested by many researchers, such as Wang et.al [15,16], Ataei et.al [17], Wang et.al [18], Tao et.al [19,20] and Waqas et.al [21]. The analytical results [15][16][17][18][19][20][21] showed that properly designed blind bolted joints exhibited semi-rigid characteristics with relatively high initial stiffness, large rotation capacity and good ductility. In addition, the corresponding blind bolted CFT frames with or without concrete slabs on steel beams were systematically studied by the authors [22][23][24][25][26].…”

Section: Introductionmentioning

confidence: 99%

“…This behavior was found to cause that gusset plates became more susceptible to weld fracture near the gusset tips or buckling deformation prior to failure of the BRBs, thus impairing the seismic performance of the dual system. More importantly, the blind bolted CFT joints could normally exhibit higher rotation capacity [15][16][17][18][19][20][21], which may lead to more serious frame action of beam-to-column joints. Therefore, it is essential to check the mechanical performance of gusset plates in the blind bolted CFT frames.…”

Section: Introductionmentioning

confidence: 99%

“…); fgp,y and tgp mean the yield strength and thickness of gusset plates, respectively;  = 0.9as shown in Figs.10 and 11. (2) Buckling check of gusset plates under compression The compressive strength of gusset plates should meet the requirement of DCRgb given in Eqs (21). and(22) to prevent gusset plate from happening buckling failure[28]…”

mentioning

confidence: 99%

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Seismic design and pseudo-dynamic tests of blind-bolted CFT frames with buckling-restrained braces

Wang

Baniotopoulos

et al. 2020

Journal of Constructional Steel Research

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The behaviour of anchored extended blind bolts in concrete‐filled tubes

et al. 2022

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Extended Hollo-Bolts (EHBs) are blind bolts that have an extended bolt shank ending in an anchor nut. When used with concrete-filled tubes, the extension and the anchor in the concrete serve to enhance significantly the performance of both connection components: bolts in tension and tube face in bending. The enhancements are a result of confining the concrete, preventing local buckling of the steel tube and allowing the blind bolt to achieve a tensile strength equal to that of standard bolt+nut fasteners. Overall, the use of the EHB results in a moment-resisting bolted connection to hollow sections which can achieve rigid behaviour under certain configurations. This paper summarizes research work done to date on such connections at the University of Nottingham. This includes experimental, numerical and analytical modelling. The aim of the work is to provide a fundamental understanding of the behaviour of anchored blind bolt connections to concretefilled columns, leading to the specification of appropriate design rules that allow the use of such bolted moment-resisting connections in practice. The work has proposed analytical models for: connection stiffness, column face-bending strength considering both single and group behaviour of bolt rows, anchored bolts in tension and anchored bolts under combined tension and shear.

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Experimental and numerical behaviour of blind bolted flush endplate composite connections

Cited by 29 publications

References 19 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

Seismic design and pseudo-dynamic tests of blind-bolted CFT frames with buckling-restrained braces

The behaviour of anchored extended blind bolts in concrete‐filled tubes

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