“Evaluation Of Response Reduction Factor For High Rise Irregular RC Building Structure”

Abstract

The prime purpose of evaluation of response reduction factor  for high rise irregular RC building structure by considering various factors into account. As we are aware about that there is significant difference in  The forces that are produced during earthquake than the structure is actually to be made in order to with stand against these forces. We cannot de sign the structures for real values of seismic forces as it is uneconomical from various  aspects. Is a necessity to minimum the actual severity of earthquake and to achieve this, The response reduction factor is applied. It is the amount that should be subtracted from the actual base shear force in order to achieve the design lateral force during the shaking of the design basic earthquake (DBE). The main factors influencing the response reduction factor (R) include over strength (Rs), ductility (Rµ),Redundancy (RR).There is no explanation given in (IS: 1893-2000) code for various Response reduction factor values Used in, so it is difficult to precede  the execution  of seismic design without firm basis. Also Regarding various factors like over-strength and ductility, IS code does not separate the component explicitly of the response reduction factor (R). In the current work, an attempt has been made to assess the actual value of the response reduction factor for RC buildings with irregular plans, building height variations, and the impact of different seismic zones. Additionally, non-linear static pushover analysis using SAP2000 is used  to compare in terms of important factor, type of foundation soil, and lateral load resisting system. The results are  compared with values provided in IS code 1893(2000). IS 456:2000 requirements were followed in the design of the frames? The lateral loads operating on the frames were extracted from IS 1893:2002 (Part 1) requirements.