Experimental investigation and analytical modelling of blind bolted flush or extended end plate connections to circular CFDST columns

Guo, Lei; Wang, Jingfeng; Wu, Shuncheng; Zhong, Liping

doi:10.1016/j.engstruct.2019.04.053

Cited by 34 publications

(1 citation statement)

References 30 publications

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“…In recent years, a large-scale investigation of the new moment resisting joint with the curved endplates ( Figure 1) has been in progress. This includes experimental and numerical studies of the behaviour of the bolted endplates connection between a CFST column and a steel beam [10][11][12][13][14][15][16], as well as analysis of the connections between a composite beam and a stainless or carbon steel concrete-filled column [17][18][19][20][21][22]. There are also studies by Tao et al [23] and Sheet et al [24] on the connections with through-column bolts, which were either parallel to the beam, or passed through the column in an "X" shape.…”

Section: Introductionmentioning

confidence: 99%

Moment Resisting Connection with Curved Endplates: Behaviour Study

Mudrov¹,

Šapalas²,

Šaučiuvėnas³

et al. 2021

Applied Sciences

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This article provides a behaviour analysis of moment resisting joints with curved endplates. This is a new type of connection that can be used for joining steel beams to the circular hollow section (CHS) columns by means of bolts. Some researchers apply the Eurocode model without considering the differences in calculation schemes and assumptions, such as by using the general model of an equivalent T-stub in tension. Consequently, many of the existing behaviour studies are somewhat misleading, thus there is a need for further research. Apart from the absence of analytical methods that are devoted to predicting the initial stiffness and strength of the curved T-stub, other technical difficulties were encountered, such as gaps between the endplate and the column, as well as the initial pre-loading force of the bolts. In the previous studies, endplates were manufactured by rolling flat plates to the precise curvature which resulted in firm contact. In contrast, in this study, endplates were manufactured from a standard CHS tube, which led to significant initial gaps. Meanwhile, in terms of preloading force, it was found that it affected the moment resistance of the joint. This paper discusses problems associated with ongoing researches and presents experimental tests of the two connections. The obtained results were further used in the parametric finite element analysis (FEA) to determine the effect of the gaps and preloading force of the bolts on the moment resistance and initial rotational stiffness of the joint. The results indicate that the behaviour of curved plated connections is exceedingly complex and that the preloading force is the key factor, therefore, it should be controlled.

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Section: Introductionmentioning

confidence: 99%

Moment Resisting Connection with Curved Endplates: Behaviour Study

Mudrov¹,

Šapalas²,

Šaučiuvėnas³

et al. 2021

Applied Sciences

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Innovative shear transfer system for Concrete Filled Steel Tubes (CFST) in columns

Soltanalipour¹,

Ferrer²,

Albareda³

et al. 2021

ce papers

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The common failure mode of composite steel‐concrete structural elements, such as composite columns, generally occurs due to the relative slipping or separation of the steel sheet and the concrete. This leads to materials overspending and low resistance. In the case of beam‐to‐column joints, the most common solution used in composite construction is introducing a perpendicular gusset plate, which is complex in terms of execution. On the other hand, there is no efficient solution for shear transferring along the whole length of the column to prevent slip under bending. The UPC patent improves very significantly the shear transferring between steel and concrete, enough to achieve the permanent connection in many cases, by means of generating a series of many crown‐shaped breakages produced by punching in the profiling stage, not only in the joints but also in the whole length. When the concrete sets, the said breakages embedded therein have the function of resisting shearing forces generated between both materials. It has been successfully applied to composite slabs and, in terms of composite columns, it is also a disruptive innovation to solve the current shear transfer limitation. Besides, this innovative system is easy to be massively produced avoiding the complexities of the conventional beam‐to‐column joints and reducing the construction costs, especially in high‐rise buildings. The aim of this paper is to present this new technology for connecting steel sheet and concrete in CFST columns.

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A Review on T-stub to Square Hollow Section Bolted Connections

Bavukkatt²

2022

Lecture Notes in Civil Engineering

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Experimental investigation and analytical modelling of blind bolted flush or extended end plate connections to circular CFDST columns

Cited by 34 publications

References 30 publications

Moment Resisting Connection with Curved Endplates: Behaviour Study

Moment Resisting Connection with Curved Endplates: Behaviour Study

Innovative shear transfer system for Concrete Filled Steel Tubes (CFST) in columns

A Review on T-stub to Square Hollow Section Bolted Connections

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