IOSR Journal of Mechanical and Civil Engineering (IOSR-JMCE) e-ISSN: 2278-1684,p-ISSN: 2320-334X, Volume 12, Issue 4 Ver. V (Jul. - Aug. 2015), PP 04-08 www.iosrjournals.org DOI: 10.9790/1684-12450408 www.iosrjournals.org 4 | Page Seismic Performance of Partial Capacity Designed RC Framed Structure Yashvanth M H 1 , A R Pradeep 2 , Dr.Mahadev M Achar 3 1 PG Student, Dept of Civil Engg, SSIT Tumkur, India 2 Asst Professor, Dept of Civil Engg, SSIT Tumkur, India 2 Associate Vice President, IIIE Ltd, Bangalore, India Abstract:Partial capacity design method is one of the performance based design approach derived from capacity design method. In partial capacity design method selected columns are designed to remain as elastic during the severe earthquake which is achieved by designing them to the higher seismic load by using magnification factor formula. Plastic hinges are allowed to form only in the expected locations so as to attain the safe collapse mechanism. In the present study, a new magnification factor formula is used for partial capacity design method and partial capacity design method uses the overstrength present in the frames unlike assuming the overstrength to columns as in case of capacity design method. The frames with 3 and 5 storeys with 3, 5 and 7 bays of equal bay width in 2D are selected to study the partial capacity design method. The frames are designed according to the IS 456 and using the magnification formula. To study the seismic performance of frames nonlinear static pushover analysis is performed and the collapse mechanism is obtained as expected. From the study it is found that the resistance of the frames to the severe earthquake depends on selection of size of the frame sections. Keyword: partial capacity design, overstrength factor, magnification factor, pushover analysis, performance point, collapse mechanism. I. Introduction The concept of partial capacity design method is derived from the ideas of capacity design (CD) method.The method is first introduced by Muljati and Lumantarna in Indonesia. The method involves designing of interior columns and beams for nominal seismic load and exterior columns for higher seismic load that is exterior columns are designed as elastic, interior columns are designed as plastic as shown in fig. 1. To design the frames for higher seismic load a new magnification factor formula is used.Previously work on PCD has been carried out in Indonesia, only the square columns are adopted for the study. The study on the parameters such as overstrength factor, variation in interior and exterior column sizes, reduction in column sizes in the upper stories etc. have been taken up. It is found that no such study/research is conducted in India. Fig. 1 Plan View of PCD In the present study 2D building frames of 3 and 5 storeys with 3, 5 and 7 bays are modelled in SAP software to know the behaviour of PCD method. The frames are designed in accordance to the Indian seismic code IS:1893-2002 (Part1). The hinge pattern shown in fig. 2 is assumed as the safe collapse mechanism.