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Extended End Plate Long Bolted Joint Using Cold Formed Steel Hollow and Concrete Filled Column

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Abstract

The objective of this study is to investigate the moment-rotation behaviour of the extended end plate long bolted moment connection using numerical, experimental and component method approaches. Totally thirty six models of the cold formed steel beam-column (hollow and concrete filled column) connection with different arrangement of long bolts are modeled and analysed using the finite element software ANSYS APDL. The cross-sectional dimension of the column and beam section is 50 mm × 100 mm × 2 mm. The length of column and beam section is 900 mm and 700 mm, respectively. The end plate size is 100 mm × 150 mm × 2.5 mm/4.0 mm and 6 mm diameter long bolts are used to connect the members in the joint. It is observed that the increase in the number of bolts increases the initial rotational stiffness and design moment capacity of the connections significantly. Substantial enhancement in the initial rotational stiffness and design moment capacity of the connection is achieved by using concrete fill in the column. From the experimental validation, it is noticed that the finite element models satisfactorily predict the actual behaviour of the extended end plate bolted moment connections. Also the initial rotational stiffness of the connections is determined based on the component method as specified in Euro Code 3(BS EN 1993-1-1 2005, BS EN 1993-1-8 2005) and the results indicate that the predictions based on the proposed analytical model agree well with the simulation model.

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Abbreviations

A:

Area of web

Ab :

Cross sectional area of bolt

Ac :

Area of concrete

a:

Distance between the bolts

b:

Breadth of beam

C1 :

End plate constant

C2 :

Bolt constant

C3 :

Column panel zone constant

Dep :

Flexural rigidity of the endplate

dh :

Diameter of bolt hole

Eb :

Elastic modulus of bolt

Eep :

Elastic modulus of end plate

Es :

Elastic modulus of column section

G:

Shear modulus

Gc :

Shear modulus of concrete

Hc :

Height of column

h:

Depth of beam

I:

Moment of inertia of the column flange

kb :

Stiffness of bolt

kep :

Stiffness of end plate

kinij :

Initial rotational stiffness

kpz :

Stiffness of the panel zone

L:

Length of bolt

Mjrd :

Design moment resistance

m:

Number of hole in per row of bolt

n:

Number of rows of bolt in column flange

rc :

Reduction factor

Tf :

Force acting at the joint

tep :

Thickness of end plate

tw :

Thickness of column web

δb :

Deflection of long bolt

δep :

Deflection of end plate in tension zone

δcf :

Deflection of column flange

δci :

Deflection of concrete fill

δw :

Deflection of column web

ρ:

Amplification factor

v :

Poisson ratio

θ:

Joint rotation

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Authors and Affiliations

  1. School of Civil Engineering, Vellore Institute of Technology, Chennai, Tamil Nadu, India

    M. SenthilPandian & M. Helen Santhi

  2. Faculty of Engineering, Shinas College of Technology, Al-Aqur, Shinas, Sultanate of Oman

    Baskar Gopalan

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  1. M. SenthilPandian
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  2. M. Helen Santhi
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  3. Baskar Gopalan
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Correspondence to M. Helen Santhi.

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SenthilPandian, M., Helen Santhi, M. & Gopalan, B. Extended End Plate Long Bolted Joint Using Cold Formed Steel Hollow and Concrete Filled Column. Int J Steel Struct 21, 613–625 (2021). https://doi.org/10.1007/s13296-021-00460-7

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  • DOI: https://doi.org/10.1007/s13296-021-00460-7

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