An economic comparison of Direct displacement based Design with IS-1893 Response Spectrum method for R.C. Frame Buildings

Displacement based design deals with the level of damage of structure by designing a structure with a specified target displacement. Traditional codal Force-based method of design cannot design structures for target design objectives under a specified hazard level. An economic comparison between a simpler form of Direct Displacement-based Design and IS-1893 Response Spectrum method for reinforced concrete frame buildings is reported here. Buildings of two different plans, three different heights are designed with the method for the performance levels achieved from those designed by the codal method and their respective costs of structural frame members are compared. It has been found that the frame buildings designed with the method is more economical than those designed with the codal method for the performance levels achieved by the said codal under similar conditions of modeling and performance levels.