Assessment Of Behavior Factor Recommended In Ec8 For Reinforced Concrete Planar Frame Using Nonlinear Analysis

According to current seismic codes the structures are calculated using the capacity designrnprocedure based on the concept of at the shear base depending on several parametersrnincluding behavior factor which is consider to be the most important parameter. Thernbehavior factor allows designing the structure when it is at ultimate limit state taking inrnto account its energy dissipation through its plastic deformation. The aim of the presentrnstudy is to assess the basic parameters of the behavior factor among of these thernreduction factor due to ductility, redundancy and over strength for reinforced concreternframes of different height and bays. Analysis are conducted on these frames using thernnonlinear statics pushover analysis method where the effect of some parameters onrnbehavior factor, such as the number of stories, the number of bays and the memberrnsection are taken in to account. The results show that the behavior factor is sensitive tornthe variation of the number of stories and bays. Also, the value of behavior factorrnrecommended by the Euro Code 8 (EC8) is underestimated, mostly for low-rise (storeyrnfour) frames.

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