https://research.iaun.ac.ir/pd/izadiniaold/pdfs/HomeWork_8988.pdf

Review on the modelling of joint behaviour in steel frames

FE model of beam-to-column extended end-plate joints

Experimental and analytical investigation of the ‘compression zone’ component within a steel joint at elevated temperatures

Generalised component-based model for beam-to-column connections including axial versus moment interaction

Steel joints have always 
been considered as 
important parts of any structural steel 
building because they provide 
the strong 
links between the principal structural 
members. The properties and 
behaviour of 
joints in both steel and composite 
structures 
have been widely studied 
for some 
time. The focus has 
recently 
been on 
improving the design of structural 
frames by taking advantage of realistic connection 
moment-rotation response. This has necessitated 
the development of an effective and 
practicable methodology 
to describe steel connection 
behaviour, despite its inherent 
complexity. Although, the evaluation of steel connections' performance at ambient 
temperature has been a continuous research 
topic, the investigation of steel 
connections at elevated 
temperatures has only recently been tackled by 
researchers. 
However, the determination of 
the behaviour, available strength and stiffness of 
moment connections 
in fire conditions 
has been a dominant theme 
in these research 
works. Moreover, over a number of years 
the Component Method has been 
developed to describe the moment-rotation characteristics of end-plate connections, 
and 
the method 
is now 
included in Eurocode 3. To date, most of 
the research 
conducted on steel connections using 
the component method 
has focused on 
relatively stiff and strong connections 
- 
flush 
end-plates and extended end-plates. 
The modelling of more 
flexible ("pinned") 
connections using 
the Component 
Method has not received much attention, since 
the benefits arising 
from 
consideration of 
their behaviour in overall 
frame 
response are usually modest. 
However, in fire 
conditions connections are subject 
to complex 
force combinations 
of moment and 
tying forces, as well as vertical shear 
forces, and 
the real behaviour, 
even of nominally pinned connections, can have a significant effect on 
the overall 
response of 
the 
frame. To date 
very 
little information on 
the behaviour and 
the 
resistance of simple shear connections 
in fire 
conditions 
has been generated. Fin 
plate shear connections, which are economic 
to fabricate and easy 
to use 
in erection, 
are among 
these shear connections which are assumed 
to act as pins 
in normal 
service conditions In this research, the behaviour and robustness of simple 
fin plate beam-to-column 
connections has been investigated, under the conditions of catenary 
tension from 
highly deflected beams which occurs 
in fire. In addition, detailed investigations have 
been made on applying the component method approach to this connection at both 
ambient and elevated temperatures. 
ABAQUS software has been selected 
to create a very detailed 3D finite element 
model. This is a complex model accounting 
for material nonlinearity, 
large 
deformation 
and contact behaviour. The connection model has been analysed through 
the elastic and plastic ranges up 
to failure. Bolt shear and bending, 
plate and web 
bearing have been observed as 
failure modes. A comparison between available 
experimental data at ambient and elevated 
temperatures and FEA 
results shows that 
the model has a high level of accuracy. However, by implementing 
the FE model 
the 
opportunity was 
then available 
to explore the connection tying 
resistance and the 
application of 
the Component Method to the fin 
plate connection. An intensive 
investigation has been conducted 
to develop 
a representation of 
this connection type 
via a simplified component model, enabling prediction of the connection response at 
both ambient and elevated 
temperatures. The three main components of a 
fin-plate 
connection 
have been identified 
as plate bearing, bolt 
shearing and web-to-plate 
friction. These components have been described in detail at ambient and elevated 
temperatures via 
intensive 
parametric FE analyses, 
leading to a simplified component 
model of a 
fin plate connection. This model has been evaluated against FE models of 
complete 
fin 
plate 
joints. Eventually, 
a 
fin plate connection spring model 
is proposed 
and successfully evaluated 
for 
tying, 
rotation, and shear actions. The Component 
Model presented 
in 
this 
research offers an opportunity 
to explore complicated 
behaviour of 
fin plate shear 
joints, 
and can be incorporated into frame analysis 
in fire 
conditions.

The behaviour of steel fin plate connections in fire

Column webs in steel beam-to-column connexions part I—Formulation and verification

Column webs in steel beam-to-column connexions part II—Design recommendations

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Column webs in steel beam-to-column connexions part I—Formulation and verification

Column webs in steel beam-to-column connexions part II—Design recommendations