Influence Of Overstrength Factor on The Global Seismic Performance Of Reinforced Concrete Structure
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Date
2018-06
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AAU
Abstract
In recent years, designs of earthquake resistance structures using performance based
design philosophies are developed. Nowadays, prediction of inelastic seismic responses
and the evaluation of seismic performance of a structural building are very important
subjects. This study is focused on capacity design philosophy approach. The criteria and
requirements used for the design of the building using capacity design philosophies are
adopted according to the provision of EBCS EN 1998-1:2014. The comparison of global
seismic performance of the structures is assessed in detail using four structural
parameters quantitatively.
In this study a ten story regular framed reinforced structure was selected and structural
modeling and analysis of the structure was done using ETABS 2016.1.0 software. The
lateral force method of analysis was used for seismic action effects. Then the structure
was designed using capacity design philosophy using four different column-beam
overstrength factors according to the requirements of the code. The detailing of critical
regions was done carefully for the required energy dissipation. After the buildings have
been designed for the incoming earthquake, the performance evaluation of the buildings
was done using static nonlinear analysis methods.
Finally, the influence of overstrength factor on the global seismic performance of the
structure was discussed. The parameters used for the evaluation of seismic performance
of the structures are capacity curve, story displacement, interstory drift and plastic hinge
distribution of the building.
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Keywords
Capacity Design, Capacity Curve, Ductility Class, Performance Level, Overstrength Factor, Plastic Hinge, Pushover Analysis