Variation of Response Reduction Factor of Ductile RC Frames for Different Parameters
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Date
2019-06-25
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MPUT, UDAIPUR
Abstract
Indian seismic code design procedure, which permits the estimation of inelastic deformation capacity of lateral force resisting systems, has been questioned since no coherence exists for determining the values of response reduction factor tabulated in code. Indian code at present does not give any deterministic values of ductility reduction factor, overstrength factor and redundancy factor to be used in the design, because of the inadequacy of research results currently available. The response reduction factor is the most important number that reflects the ability of the structure to dissipate energy through inelastic behavior. This factor is unique and different for different types of structures and designs. However, Indian Standards 1893: 2002 provides a single value of response reduction factor for all types of structures and designs being divided only on the basis of type of detailing.
This study evaluates the Response reduction factor for the different configurations of the structures with all Indian seismic zones (II, III, IV and V) and different number of storeys (2, 5, 10 and 15). Nonlinear static analysis is used to evaluate the response reduction factor. It is found that the response reduction factor factor varies with the seismic zones and the number of stories. It is also found that the number of stories of buildings has greater effect on the response modification factors. These results are noteworthy for the seismic design code of India which, at the moment, does not take into account the variation of the response reduction factor
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Variation of Response Reduction Factor of Ductile RC Frames for Different Parameters
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Agrawal V. And Gupta T.