The performance of a new blind-bolt for moment-resisting connections

Tizani, Walid; Ridley-Ellis, Daniel

doi:10.1201/9780203734971-48

Cited by 21 publications

(16 citation statements)

References 1 publication

(1 reference statement)

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“…773-774.105 Accepted: 2014- 11-04 © 2015Trans Tech Publications Ltd, Switzerland Online: 2015 The established use of Lindapter Hollo-Bolts is currently restricted to transferring tensile forces and vertical shear only -safe working loads can be found in manufacturer brochures [1]. Filling Square Hollow Sections (SHS) with concrete was found to improve the performance of Hollo-Bolted connections in resisting moments [2], but there is currently no guidance available on how to model the behaviour of such connections. To model connections in accordance to the Eurocode 3, each connection is split into basic components so that each component is evaluated separately.…”

Section: -Part Hollo-boltmentioning

confidence: 99%

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

Elamin

Tizani

Mahmood

2015

AMM

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This paper investigates the effect of bolt gauge on the face bending behaviour of concrete-filled Square Hollow Sections (SHS) in Hollo-Bolted connections. A set of full-scale experiments were undertaken to examine the effects of varying the bolt gauge on the SHS face bending behaviour while controlling all other parameters. Typical experiment involved one row of two bolts pulled out of concrete-filled SHS. A special dummy bolts were manufactured to the exact size and geometry of open Hollo-Bolts, and were used in the experiments to remove the influence of any deformation associated with the real Hollo-Bolts, and isolate the face bending behaviour. Non-contact video-based equipment was used to record the SHS face deformation. This deformation is recorded as force-displacement relationship which is commonly used to represent the structural behaviour of similar components, and typically defined by initial stiffness, yield force and post yield stiffness. Across the range considered in this investigation, it was found that varying the bolt gauge to SHS width ratio have a significant effect on the concrete-filled SHS face in bending component. Both the initial stiffness and the yield force of the component were found to increase with the increase of the bolt gauge. The Post-Yield stiffness was not affected by the change in bolt gauge.

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Section: -Part Hollo-boltmentioning

confidence: 99%

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

Elamin

Tizani

Mahmood

2015

AMM

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“…Wang et al [10][11][12][13] investigated the behavior of blind bolted end-plate (flush and extended) connections to square and circular CFST columns; in this work, 50-mm-long straight extensions were used for the blind bolts, and similar conclusions were drawn. Then, Tizani and Dan [14] proposed the Extended Hollo-Bolt (EHB), which extended the bolt shank of the Hollo-Bolt and attached an anchor nut at the end. Pitrakkos et al [15] conducted a comprehensive experiment on a novel anchored blind bolt in tension, indicating that the anchored blind bolt can finally achieve the ultimate strength of its internal bolt to enhance the tensile strength and stiffness of the blind bolt.…”

Section: Introductionmentioning

confidence: 99%

Seismic Behavior of a Novel Blind Bolted Flush End-Plate Connection to Strengthened Concrete-Filled Steel Tube Columns

et al. 2020

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Modified blind bolts (Hollo-Bolt) and a locally strengthened steel tube column in the panel zone were created to overcome the moment-resisting problem for the bolted connections between concrete-filled hollow section columns and open section beams and to enhance the performance of connections. The cyclic loading was conducted on a total of six modified anchored blind bolted flush end-plate connections to concrete-filled steel tube (CFST) columns. The key parameters investigated were the tube wall thickness, end-plate thickness, blind bolt anchorage method, and beam section. The failure mode, hysteretic behavior, strength, stiffness, ductility, and energy dissipation capacity of the connections were analyzed and evaluated with all details. The results indicated that connections with modified anchored blind bolts and locally strengthened steel tubes could avoid the premature failure of CFST column and exhibit an improved behavior with a favorable strength, stiffness, and stiffness degradation. The test observations reveal two representative failure modes, and the tube wall thickness and blind bolt anchorage method have a significant effect on the resultant failure mode. Moreover, the use of thin endplate and weak beam can effectively enhance the hysteretic behavior of joints, ductility, and energy dissipation capacity; and the change in anchoring method has little effect on the stiffness. Finite element (FE) analysis models were established for the aforementioned connections. The numerical models were validated against the experimental results and exhibited good agreement. Finally, based on the component method, an initial stiffness calculation method was established for the connections.

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“…On the basis of the stiffness, strength, and hysteresis characteristics of the connections, they concluded that when the CFT connections connected by the Hollo-Bolt are subjected to flexure, the compression area can be supported by the infilled concrete; by contrast, the tensile area is always the weak part due to the low outward bending stiffness of the rectangular steel tubular walls, thereby limiting the performance of the connections. Tizani et al [7] modified the Hollo-Bolt by extension of threaded rods and installation of a nut at the end for anchoring, similar to a headed stud, as shown in Figure 1(b). Pitrakkos and Tizani [8] systematically studied the tensile performance of the modified Hollo-Bolt, analyzed the influences of different parameters on its tensile performance and indicated that the modified Hollo-Bolt can display the full tensile capacity of the threaded rod.…”

Section: Introductionmentioning

confidence: 99%

Nonlinear Finite Element Analysis of Anchored Blind Bolted Joints to Concrete-Filled Steel Tubular Columns

Wang¹,

Zhan²,

Pan³

et al. 2019

IJPE

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A nonlinear finite element analysis (FEA) on rectangular concrete-infilled tubular (CFT) column connections was conducted using the FEA software ABAQUS. In this analysis, loading path and stress distribution of the anchored blind-bolted (ABB) connections to CFT columns were clearly defined; influences of strength grade of bolts, thickness of endplates, vertical interval between bolts, diameter of bolts, and pretension on bolts on the studied connections were determined. The results of FEA indicate that the flush endplate connections of ABB CFT columns are typical semi-rigid connections. The established finite element (FE) model was verified by test results of six anchored blind-bolted flush endplate connections to CFT columns. The test results show that the model can accurately simulate mechanical performance of the ABB connections and is suitable for different forms of ABB connections to CFT columns.

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The performance of a new blind-bolt for moment-resisting connections

Cited by 21 publications

References 1 publication

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

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

Seismic Behavior of a Novel Blind Bolted Flush End-Plate Connection to Strengthened Concrete-Filled Steel Tube Columns

Nonlinear Finite Element Analysis of Anchored Blind Bolted Joints to Concrete-Filled Steel Tubular Columns

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