Study On Seismic Performance Factors Of Frame Structures With Fiber-Reinforced Concrete In Partial Region

Global seismic performance factors（SPFs）is the key of the integral safety factor.Fiber reinforced concrete（FRC）compared with normal concrete with ultra high tensile strain-hardening and cracking performance.Fiber-reinforced concrete instead of normal concrete was used in potential plastic region of beam end and column end.By the global over-strength factor,the response modification coefficient and the deflection amplification factor of frame structures.Frame structures with FRC in the potential plastic region of beam end and column end has been greatly improved comparing to reinforced concrete frame structures.In this paper,the main research contents and results are as follows:（1）In strict accordance with the current seismic design code,design for 6 different layer and different intensity of RC frame structure,using PKPM component section reinforcement calculation.The nonlinear finite element models of these structures are set up in the platform Perform-3d.On the basis of this,The analyses of“capacity”values seismic performance are then carried out for the 12 frame structures by nonlinear static method and nonlinear dynamic method.The results show that the FRC frame structure of collapse resistance is better than that of RC frame structure.（2）Analyzes the 12 frame structure respectively by using the static capacity spectrum method and time history analysis method,the research on different strength demand to get the“real”values of the global seismic performance factors of these 12 frame structure.Then the concepts and the expression of capacity-real ratios for the seismic performance factors are put forward to assess the seismic performance of RC and FRC frame structure.Results show that under the effect of ground motion,with local FRC materials,the structure of the actual seismic performance coefficient of the RC frame structure has increased,but the structure layer should not be more than 8.（3）12 frame structures are analyzed for incremental dynamic analysis（IDA）.Then according to the analysis result,cacullate the median collapse intensity S_CT,the collapse margin ratio CMR and get collapse fragility curve by practical method.Based on the basic period of structures and the ductility factor μ_T,we can get the spectral shape factor SSF and the adjusted collapse margin ratio ACMR,and offer their change rules with seisimic intensity and structure layer.From the Angle of CMR prove that FRC frame structures are better than RC frame structures.