Earthquake Response Of Low Rise RC Moment Frame Structures According To Energy Dissipation Ratio Of Beam Column Joints

Reinforced concrete frame structure has flexible and diverse layout,and its force transfer mechanism is also clear and concise,therefore RC frame structure is used in building commonly,and it is widely used in the earthquake fortification area for its high load capability,good ductility and entirety.So research on anti-seismic performance of frame structure has important significance.The nonlinear dynamic analysis method which based on finite element analysis software is widely used as an effective and practical research tool in the field of earthquake engineering.Seismic response of RC moment frame structures(particularly,in low rise buildings)is affected by the inelastic hysteretic response and energy dissipation of beam-column joints.In current earthquake design codes,however,earthquake response of the structures is evaluated without direct consideration of the energy dissipation of beam-column joints.In the present study,nonlinear time history analysis using the energy-based hysteresis model was carried out to investigate the effect of the energy dissipation of the beam-column joints on seismic response of the structures.To demonstrate the applicability of the analysis method,it was applied to existing dynamic test results of RC moment frame structures.On the basis of the proposed method,nonlinear time history analysis for six typed low-rise RC moment frame structures under 14 earthquake loads was performed.Design parameters were the energy dissipation ratio of beam-column joints(from pinching behavior to elasto-perfectly plastic behavior),moment frame stories(3,5,and 9 stories),and moment frame configuration(two and four spans).The analysis results showed that as the energy dissipation of beam-column joints increased,the lateral drift and ductility requirement of the low-rise RC moment frame structures decreased.