Paper Details

This retrofitting method comprises of installing haunches at the beam column joints of a reinforced concreteframe, in order to modify structure’s response to seismic hazards. The experimental program consists of two small scalemodels of one third of the actual structure sizes. The specimens were brought under construction at the civil engineeringdepartment, UET Peshawar. Test frame comprised of a regular reinforced concrete frame and a frame with haunch atvarious connections which were installed for the purpose of providing ample amount of joint rigidity to the structure.Using a natural accelerogram compatible to the design spectrum dynamic test were carried out with increasing levels ofshaking. Dynamic characteristics were calculated for each phase of free vibration before and after every intensity check.Haunch sizes were computed on trial and error basis considering 60 percent of the excitation provided by the shaketable. Displacement transducers and accelerometers were attached to the models for recording the structural response interms of displacement and acceleration time histories. After the analysis the data was processed further to computecertain parameters including inter storey shears and base shear. Also the drift profile and the lateral deflected shape ofthe structure were obtained giving insight of the structure’s behavior. Capacity curve was plotted co-relating the baseshear with the lateral displacement. The research showed experimentally and numerically that the proposed retrofittingtechnique worked well in reducing the joint damageability of the RC frame structures enhancing the seismic capacity.The technique ensures safety for the occupant’s lives during any devastating disaster promising less loss of economy andhuman lives in future.

Sida Hussain, Hanif Ullah, Fasih Ullah Khan, “To Evaluate Seismic Performance of Special Moment Resisting Frames by Retrofitting beam Column joints using Haunch An Experimental and Numerical approach”, International Journal of Advance Engineering and Research Development (IJAERD), Vol. 5, Issue 11, pp. 67-73, November 2018.