Assessment of Behavior Factor recommended in EC8 for Reinforced Concrete Planar Frame Using Nonlinear Analysis
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Date
2018-03
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Addis Ababa University
Abstract
According to current seismic codes the structures are calculated using the capacity design
procedure based on the concept of at the shear base depending on several parameters
including behavior factor which is consider to be the most important parameter. The
behavior factor allows designing the structure when it is at ultimate limit state taking in
to account its energy dissipation through its plastic deformation. The aim of the present
study is to assess the basic parameters of the behavior factor among of these the
reduction factor due to ductility, redundancy and over strength for reinforced concrete
frames of different height and bays. Analysis are conducted on these frames using the
nonlinear statics pushover analysis method where the effect of some parameters on
behavior factor, such as the number of stories, the number of bays and the member
section are taken in to account. The results show that the behavior factor is sensitive to
the variation of the number of stories and bays. Also, the value of behavior factor
recommended by the Euro Code 8 (EC8) is underestimated, mostly for low-rise (storey
four) frames.
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Keywords
Behavior factor, ductility factor, over strength factor, redundancy factor, base shear, pushover analysis