摘要
为了揭示预制钢管混凝土叠合柱与预制部分包裹混凝土(PEC)梁螺栓连接节点的受力性能和破坏模式,通过ABAQUS有限元软件建立了该组合节点的有限元分析模型,考虑了材料本构关系和复杂接触问题。通过水平低周往复荷载试验验证了数值分析模型的准确性,对其破坏模式和骨架曲线进行了研究。考虑了几何参数、材料参数、荷载参数对节点力学性能的影响,揭示了多种参数对于节点性能的影响规律。结果表明,预制钢管混凝土叠合柱与预制部分包裹混凝土组合梁全螺栓节点具有良好的受力性能,柱钢材强度、柱混凝土强度、轴压比、螺栓直径及柱截面含钢率对节点的抗弯承载力影响较大;柱混凝土强度、轴压比及柱截面含钢率对节点的初始刚度影响较大。研究结果将为此类节点的分析与设计提供科学依据。
In order to study the mechanical behavior and the failure mode of prefabricated concrete-filled steel tube(CFST)composite column bolted to partially encased composite(PEC)beam joints,a finite element(FE)model of a CFST composite column bolted to PEC beam joint is established accounting for the material model and complex contact interactions in ABAQUS. The accuracy of analytical model is validated by using tests data under cyclic loading. The failure modes and skeleton curves of this joint are studied. Substantial parametric analysis is carried out to study the influence of geometric parameters,material parameters and loading parameters on this joint. The influence laws of various parameters on the joint performance are revealed. The research results indicate that this type of joint has a set of good mechanical properties. The steel strength,concrete strength,axial compression ratio,bolt diameter and steel ratio of column have a significant influence on the bearing capacity of the joint. Also,concrete strength,axial compression ratio and steel ratio of column have a large influence on the initial stiffness of the joint. The results can provide a reference for the analysis and design of this joint.
作者
王静峰
王翰斓
郭磊
郭翔
WANG Jingfeng;WANG Hanlan;GUO Lei;GUO Xiang(College of Civil and Engineering,Hefei University of Technology,Hefei 230009,China;Anhui Collaborative Innovation Center for Advanced Steel Structure Technology and Industrialization,Hefei University of Technology,Hefei 230009,China)
出处
《建筑钢结构进展》
CSCD
北大核心
2022年第7期49-56,共8页
Progress in Steel Building Structures
基金
国家自然科学基金(51478158)
教育部新世纪人才支持计划(NCET-12-0838)。
关键词
钢管混凝土叠合柱
部分包裹混凝土梁
螺栓连接
有限元分析
受力性能
concrete-filled steel tube(CFST)composite column
partially encased composite(PEC)beam
bolted connection
finite element(FE)analysis
mechanical behavior
