STRONG COLUMN WEAK BEAM CONCEPT BY ANALYSING RCC MRF FRAME BY NON LINEAR STATIC PROCEDURE

During past earthquakes column plastic hinges are more prominent than beam hinges which gives rise to global structural damage and high life threatening risk. All the structural components transfers their forces through column and column than shares it with foundation to soil, so u can imagine if column fails whole structure can collapse this is strong beam weak column concept. By making column more moment resistant than beams the plastic hinges shifts to beam and avoids the global damage in this case only beam will show flexure as a sign of beam damage and the people will have adequate time to evacuate the place and beam failure will only limit to a particular storey. This concept is strong column weak beam. In this paper three RC frame of 5, 8 and 12 storey height are investigated for strong column weak beam concept for zone 5 and medium soil and moment capacities are checked as per IS1893:2016. For checking the performance of plastic hinges of column and beam non linear static analysis (pushover analysis) is done in ETABS 2016 these hinges are checked and verified according to acceptance criteria given in FEMA 356. Base shear and performance point with displacement is checked for all frames.