Tensile behaviour of innovative one-sided bolts in concrete-filled steel tubular connections

Ng, Wei Hong; Kong, Sih Ying; Chua, Yie Sue; Bai, Yu

doi:10.1016/j.jcsr.2022.107165

Cited by 18 publications

(4 citation statements)

References 21 publications

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“…Experimental data in [9] was adopted to verify the developed FE model. Experimental setup and the dimensions of T-head bolt are shown in Figure 3.…”

Section: Verificationmentioning

confidence: 99%

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Tensile Behavior of Anchored Stainless Steel T‐Head Blind Bolts within Concrete‐Filled Steel Square Tubes

Li,

Huang,

Zhao

2023

ce papers

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Based on a recent review on blind bolted connections to concrete‐filled steel tubes, there is a need to improve the performance of anchored blind bolts in such composite connections. This paper presents a study on the pull‐out behavior of anchored blind bolts under applied tensile load in terms of stiffness, yield strength, ultimate strength and load‐displacement response. A finite element (FE) model with concrete damage plasticity model was developed for parametric study. Effects of key parameters, such as concrete strength, bolt grade, embedment length, tube thickness and tube grade, on the tensile behavior of the connection were studied to identify the key parameters influencing the behavior. Finally, a predictive model based on component method was proposed to estimate the structural behavior of the blind‐bolted connections.

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“…Experimental data in [9] was adopted to verify the developed FE model. Experimental setup and the dimensions of T-head bolt are shown in Figure 3.…”

Section: Verificationmentioning

confidence: 99%

“…The experimental results (carbon steel) in [9] and FE results (stainless steel bolt and tube with tube t tw =3 mm) obtained in this study were adopted to validate the accuracy of the proposed component method. A comparison of the load-displacement curves is shown in Figure 12.…”

Section: Verificationmentioning

confidence: 99%

Tensile Behavior of Anchored Stainless Steel T‐Head Blind Bolts within Concrete‐Filled Steel Square Tubes

Li,

Huang,

Zhao

2023

ce papers

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“…Piseth Doung et al [19] researched the mechanical behavior of wide-flange (WF) beam-to-box column connections, assessing the tensile strength and failure mechanisms and noting a connection strength improvement of roughly 30% in concrete-filled specimens over those without concrete. Wei Hong Ng et al [20] studied the tensile mechanical behavior of blind bolts in CFST connections, finding that a welldesigned anchorage system could significantly enhance the stiffness and tensile capacity of the connections. Wu et al [21] introduced a novel design for bolted beam-to-column connections in CFST structures, showcasing a superior seismic resistance through enhanced stiffness, strength, ductility, and energy dissipation mechanisms.…”

Section: Introductionmentioning

confidence: 99%

Mechanical Behavior of Precast Circular Semi-Continuous CFST Columns under a Uniaxial Eccentric Load

Cao,

Zhu,

Qian

et al. 2024

Buildings

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For this study, we conducted a detailed examination and comprehensive comparative analysis of the structural responses and mechanical behavior of bolted sleeve connections in precast circular semi-continuous steel tubular concrete (PCSCFST) columns. The research involved fourteen specimens, and we considered the impacts of various parameters, including eccentricity, external steel sleeve thickness, bolt diameter, and slenderness ratio. The findings revealed that the external steel sleeve significantly enhances the protection of the connection area, enabling the bolts to effectively withstand eccentric loads. However, sleeves that are too thick may lead to premature bolt failure, reducing their ultimate load-bearing capacity. Using bolts to transfer loads to the concrete significantly strengthens the restraining effect of the steel sleeve. Nonetheless, increasing the bolt diameter beyond a certain threshold may diminish this beneficial impact, potentially leading to connection failure and a decrease in ultimate load-bearing capacity. A new ‘cooperative value q’ measures component collaboration at ultimate capacity, showing that shorter columns offer less effective coordination than longer ones. Through regression analysis, we formulated a prediction for axial ultimate bearing capacity, closely aligning with the experimental data (Npre-a/Nu average value of 1.003, variance 0.00248). Three N–M curves, including the Eurocode 4 method, offered conservative predictions, with Eurocode 4 closely matching the experimental results. A refined prediction method following Eurocode 4 was developed, yielding an average Ppre-U/Pu value of 0.971 and a variance of 0.0107.

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“…Although there are no studies for the proposed configurations, the anchorage behavior of blind bolts in CFSTs have been extensively investigated via pullout tests and may provide some insights for this study. Various types of blind bolts were studied, such as Extended Hollo Bolt [34], T-bolt [35], and the Ajax anchored bolt [36]. By setting anchors, the anchorage strength could be greatly enhanced and the pullout capacity comes mainly from the anchorage of the bolt's anchor and the bearing of the tube face wall [37].…”

Section: Introductionmentioning

confidence: 99%

Feasibility of Recycled Aggregate Concrete in a Novel Anchoring Connection for Beam-to-Concrete-Filled Steel Tube Joints

Su,

Zhao,

Cai

et al. 2024

Buildings

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Owing to the substantial benefits in environmental protection and resource saving, recycled aggregate concrete (RAC) is increasingly used in civil engineering; among the different types, RAC-filled steel tubes are an efficient structural form utilizing the advantages of concrete and steel tubes. This paper proposed a novel full-bolted beam-to-concrete-filled steel tube (CFST) joint and investigated the anchoring behavior of the steel plates embedded in RAC-filled steel tubes, which represents the behavior of the tensile zone in this joint, to demonstrate the feasibility of utilizing RAC in composite structures. The specimen consisted of a CFST and a connecting plate embedded in the CFST. In total, 18 specimens were tested to study the effects of concrete type (i.e., recycled aggregate concrete and natural aggregate concrete), anchoring type (i.e., plate with holes, notches, and rebars), and plate thickness on the pullout behavior, such as anchorage strength, load–displacement response, and ductility. Based on experimental results, the aggregate type of the concrete does not affect the pullout behavior obviously but the influence of anchoring type is significant. Among the three anchoring methods, the plate with rebars exhibits the best performance in terms of anchorage strength and ductility, and is recommended for the beam-to-CFST joint. In addition, plate thickness obviously affects the behavior of plates with holes and notches, the bearing area of which is proportional to the thickness, whereas the pullout behavior of the plates with rebars is independent of thickness. Finally, design formulas are proposed to estimate the anchorage strength of the connecting plates, and their reasonability is validated using the experimental results.

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Tensile behaviour of innovative one-sided bolts in concrete-filled steel tubular connections

Cited by 18 publications

References 21 publications

Tensile Behavior of Anchored Stainless Steel T‐Head Blind Bolts within Concrete‐Filled Steel Square Tubes

Tensile Behavior of Anchored Stainless Steel T‐Head Blind Bolts within Concrete‐Filled Steel Square Tubes

Mechanical Behavior of Precast Circular Semi-Continuous CFST Columns under a Uniaxial Eccentric Load

Feasibility of Recycled Aggregate Concrete in a Novel Anchoring Connection for Beam-to-Concrete-Filled Steel Tube Joints

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