Authors :
Kabir Sadeghi; Hama Issa Moctar
Volume/Issue :
Volume 8 - 2023, Issue 1 - January
Google Scholar :
https://bit.ly/3IIfn9N
Scribd :
https://bit.ly/3jNvgFq
DOI :
https://doi.org/10.5281/zenodo.7628532
Abstract :
One of the biggest challenge for structural
engineers is to design a safety structure that is going to
resist during seismic activities, therefore the concept of
strong column and weak-beam. To withstand those
loading that sometimes tend to overpass the elastic limit
and lead to the collapse mechanism, it is crucial to
perform the pushover analysis that is a non-linear static
analysis where the structure is subjected to lateral
stresses. As a result, various characteristics are recorded,
including failure, the development of plastic hinges, and
yield. Since the columns are the components from which
all the loads are transferred to the foundation, having
more rigid columns rather than beams is important in the
formation of plastic hinges. The elastic stiffness factor
measures how well a structure can withstand stresses
before failing and having plastic hinges. The aim of this
paper is to make a contrast on the zone of plastic hinges
formation with respect of the concept of strong column
and weak-beams but also the assessment of the stiffness
factor. In order to fulfil the purpose of this study using
ETABS software, pushover analysis has been performed
on 12 two-dimensional reinforced concrete and steel
frames with variation of span length and number of span.
The pushover analysis gave the hinges formation zone and
the stiffness factor has been evaluated using the pushover
curve. The study shown that, the distribution of the plastic
hinges and stiffness are affected by the span length, the
number of span but also the material because reinforced
concrete frames are found to be safer and stiffer than steel
frames. The stiffness is found for the Reinforced concrete
to decrease with around 50% and 40% of decrease is
observed for steel frames.
Keywords :
Strong Column Weak-Beam (SCWB), Reinforced Concrete (RC), Collapse Mechanism, Pushover Analysis and Stiffness Factor.
One of the biggest challenge for structural
engineers is to design a safety structure that is going to
resist during seismic activities, therefore the concept of
strong column and weak-beam. To withstand those
loading that sometimes tend to overpass the elastic limit
and lead to the collapse mechanism, it is crucial to
perform the pushover analysis that is a non-linear static
analysis where the structure is subjected to lateral
stresses. As a result, various characteristics are recorded,
including failure, the development of plastic hinges, and
yield. Since the columns are the components from which
all the loads are transferred to the foundation, having
more rigid columns rather than beams is important in the
formation of plastic hinges. The elastic stiffness factor
measures how well a structure can withstand stresses
before failing and having plastic hinges. The aim of this
paper is to make a contrast on the zone of plastic hinges
formation with respect of the concept of strong column
and weak-beams but also the assessment of the stiffness
factor. In order to fulfil the purpose of this study using
ETABS software, pushover analysis has been performed
on 12 two-dimensional reinforced concrete and steel
frames with variation of span length and number of span.
The pushover analysis gave the hinges formation zone and
the stiffness factor has been evaluated using the pushover
curve. The study shown that, the distribution of the plastic
hinges and stiffness are affected by the span length, the
number of span but also the material because reinforced
concrete frames are found to be safer and stiffer than steel
frames. The stiffness is found for the Reinforced concrete
to decrease with around 50% and 40% of decrease is
observed for steel frames.
Keywords :
Strong Column Weak-Beam (SCWB), Reinforced Concrete (RC), Collapse Mechanism, Pushover Analysis and Stiffness Factor.
