This research deals with analytical study of exterior Beam-Column
connections behavior under seismic load.
Tow parameters were considered: axial load on the column and
confinement of joint region with stirrups.
Ansys program was used to analytica
l study of three types of exterior
Beam-Column connections under cyclic load.
The results were shown a good agreement with general behavior of
three types.
The analytical results indicate that the tow parameters will improve
the behavior of the connections delay cracking at joint core and
increasing connection stiffness in rotation and displacement with
decreasing shear value at joint.
Stability of elements require determination of their dimension, such that
the resulting displacement under static or thermal loads are acceptable.
Those elements have to resist the applied loads so that the structure or any
element does not loss c
onstancy. The most important criteria for stability
is represented via element curvature under the influence of load, that load
is of any type or in any position. Therefor this paper presents derivation
of a theoretical equation to calculate the deflection generated from
heating variation between the top and bottom surface of simple steel
beam, by means of heating transfer expression.
This paper presents structural
analysis in using ANSYS programme for modeling of heat load then
comparison between the analytical results and experimental results is
performed .
Flush end-plate beam-to-column joints often subjected to a combination of bending
and axial forces .The level of axial forces in the joint may be significant in case of: sway
frames under horizontal loads, pitched roof portal frames and irregular f
rames.. Many of
design codes neglect the effect of axial force in the connection analysis as it is usually low.
Eurocode 3 limits the axial force acting on the joint to 10% of the design plastic resistance
of the connected member cross section to apply component method.
The objective of this paper is to discuss the behavior of flushend-plate connections
under a combination of bending and axial tension or compression forces For the nonlinear
finite element analysis the modeling process was carried out using CATIA computer
program. The results of the finite element analysis of the connection showed that by
applying the tensile axial load of the beam into the connection, the ultimate bending
capacity of the connection will decrease. On the other hand, by applying compressive axial
load of the beam to the connection, the ultimate bending capacity of the connection will
increase at first; but after the buckling of the compressive flange of the beam takes place,
the total capacity of the connection tends to decrease.
Our subject contains studying criterions which ensuring a durable serving of concrete
frame joints, and then choosing two connections according to its deployment and the
availability of its arithmetic relations and easy to be prepared from local ma
terials, and
discuss experimental results of the resent study which allow us to achieve the next part of
our research,which is a structural designing programme by visual basic language to serve
the work in order to be fast and precise.
the last part of the subject is comprising a number of actualizations which confirm
that the process of programming is correct, and then compare the results of experimental
programs and code with our programme results to achieve many important ameliorations
on this programme to become more easily and better.
RC moment-resisting frames (RCMRFs) have commonly been used for low-to-moderate rise buildings in
seismic prone regions. RCMRFs can perform well when they are subjected to strong earthquake ground
motions if they are properly designed and detailed
to dissipate the seismic input energy through
deformations in inelastic range. The connections between beams and columns thus become critical
components to the performance of these structures.
In conventional RCMRF connections, the width of the beam does not exceed the width of the column.
Adopting a flat beam system for the design scheme provides many advantages, such as the reducing the
amount of formwork required, the simplicity for repetition, and the decrease of the required story height.
RCMRFs with flat beams have been used extensively, despite the lack of sufficient information on how
this system behaves under earthquake loading which leads the codes to restrict the use of flat beamcolumn
connections in earthquake prone regions.
