建筑钢结构进展2026，Vol.28Issue(1)：1-9,9.DOI:10.13969/j.jzgjgjz.20240717003
圆钢管混凝土柱-预应力钢筋混凝土梁混合连接节点抗震性能研究
Seismic Performance of Hybrid Connection Joints Between RCFST Column and PRC Beam
摘要
Abstract
In order to study the seismic performance of hybrid connection joints between the round concrete-filled steel tubular(RCFST)column and prestressed reinforced concrete(PRC)beam,two hybrid connection joints with a scale ratio of 1∶5 were designed based on a long-span RCFST column to PRC beam structure in the waiting floor of a high-speed railway station.A low-cycle reversed loading test was conducted on the two specimens with or without I-shaped steel corbels,to analyze the failure mode,ductility,stiffness degradation and energy dissipation.A refined finite element analysis model was established by ABAQUS software,and on the basis of the verification of the test results,the influence of axial compression ratio,prestress level,steel ratio of beam section and concrete strength on the mechanical performance of hybrid connection joints was analyzed.The results showed that the failure mode of the hybrid connection joint was mainly the obvious plastic hinge appeared between the end of the main beam at the junction with the ring beam.Compared with the specimen without I-shaped steel corbel,the hysteresis curve of the specimen with I-shaped steel corbel was fuller,and the peak load and ductility were increased by 16.76%and 5.6%,respectively,indicating a significant improvement in the seismic performance of the hybrid connection joints.There was almost no relationship between the initial stiffness of the hybrid connection joints and the axial compression ratio,the prestress level,steel ratio of beam section and concrete strength,while the bearing capacity of the hybrid connection joints was negatively correlated with the axial compression ratio,and was positively correlated with the remaining three parameters.Meanwhile,an appropriate prestress level can improve the bearing capacity of the joint.Therefore,based on the hybrid joint member form of RCFST column and PRC beam,it is suggested that a prestress level of 0.7 be adopted in the design of the PRC beam.关键词
圆钢管混凝土柱/预应力钢筋混凝土梁/混合连接节点/抗震性能/低周往复加载试验/有限元分析/工字钢牛腿Key words
round concrete-filled steel tubular(RCFST)column/prestressed reinforced concrete(PRC)beam/hybrid connection joint/seismic performance/low-cycle reversed loading test/finite element analysis/I-shaped steel corbel分类
建筑与水利引用本文复制引用
李贝贝,刘奥,王静峰,曹瑞雪,贡宏要..圆钢管混凝土柱-预应力钢筋混凝土梁混合连接节点抗震性能研究[J].建筑钢结构进展,2026,28(1):1-9,9.基金项目
安徽省科技创新平台重大科技项目(202305a12020013),中央高校基本科研业务费专项资金项目(123456789123) （202305a12020013）
