预期损伤部位采用FRC梁柱组合件层间剪力-变形计算模型研究

通过分析梁柱组合件层间变形与梁端变形、柱端变形和节点核心区剪切变形之间的关系，梁端、柱端弯矩与曲率之间的三折线关系及节点核心区剪力与柱顶剪力之间的关系，提出预期损伤部位采用纤维增强混凝土（FRC）梁柱组合件层间剪力-变形计算模型；以节点核心区剪切破坏为主要破坏模式，分析FRC梁柱组合件在开裂点、屈服点和峰值点处的层间剪力、梁端变形、柱端变形和节点核心区剪切变形及各部分变形引起的层间变形占层间总变形中的比例及变化规律。将模型计算结果与试验结果进行比较，结果表明:提出的层间剪力-变形理论计算模型可较好地反映FRC梁柱组合件在地震作用下的层间剪力-变形关系。

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.