CALCULATION MODEL FOR INTER-STORY SHEAR DEFORMATION OF BEAM-COLUMN SUBASSEMBLAGES WITH FRC IN THE EXPECTED DAMAGE LOCATION

The deformation relationship between beam-column subassemblages and beam end, column end as well as the joint core zone, the moment-curvature relationship between beam section and column section, and the shear strength relationship between the joint core zone and column top are analyzed; and then the calculation model for inter-story shear strength-deformation of beam-column subassemblages with fiber-reinforced concrete (FRC) in the expected damage location is proposed. Furthermore, taking the shear failure of the joint core zone of FRC beam-column subassemblages as the main failure mode, the paper analyzes the inter-story shear strength, beam deformation, column deformation and joint shear deformation, and investigates the contributions of each deformation to the total inter-story deformation at cracking point, yielding point and peaking point, respectively. Finally, the comparison between calculation results and experimental results shows that the proposed model for the calculation of inter-story shear strength-deformation agrees well with the inter-story shear strength-deformation relationship of FRC beam-column subassemblages under earthquakes.