方套方中空夹层钢管混凝土柱与钢-混凝土梁单边螺栓端板连接节点数值分析  

Numerical Analysis of Blind Bolted End-Plate Connections Between Square CFDST Columns and Steel-Concrete Composite Beams

作　　者：王静峰[1,2] 端梦珺 郭磊 张猛 WANG Jingfeng;DUAN Mengjun;GUO Lei;ZHANG Meng(College of Civil Engineering,Hefei University of Technology,Hefei 230009,China;Anhui Key Laboratory of Civil Engineering Structures and Materials,Hefei University of Technology,Hefei 230009,China)

机构地区：[1]合肥工业大学土木与水利工程学院,合肥230009 [2]合肥工业大学,安徽土木工程结构与材料省级重点实验室,合肥230009

出　　处：《建筑钢结构进展》2020年第6期46-55,68,共11页Progress in Steel Building Structures

基　　金：国家自然科学基金(51178158);教育部新世纪优秀人才支持计划(NCET-12-0838)。

摘　　要：为了揭示方套方中空夹层钢管混凝土柱与钢-混凝土组合梁单边螺栓端板连接的受力性能和破坏机理,通过ABAQUS有限元软件建立了该组合节点的数值分析模型,明确了材料本构关系模型和复杂接触问题。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,对其破坏模式和滞回曲线进行了评价。考虑了几何参数、材料参数、荷载参数对节点水平荷载-水平位移曲线的影响,讨论了极限承载力和初始刚度的影响规律。研究表明,方套方中空夹层钢管混凝土柱与钢-混凝土组合梁单边螺栓端板连接节点具有良好的抗震性能和受力性能,可应用于高烈度地震区的装配式组合框架;提出的此类型组合节点数值分析方法可用于装配式组合框架的设计与计算。In order to reveal the mechanical behavior and failure mechanism of blind bolted end-plate connections between square concrete-filled double skin steel tubular(CFDST)columns and steel-concrete composite beams,a finite element(FE)model of this composite joint is built accounting for complex material model and contact interactions.The accuracy of numerical analytical model is verified against the test results under cyclic loads.Typical failure modes and hysteretic behavior of this type of connection are evaluated.Furthermore,substantial parametric analysis is carried out to study the influence of geometric parameters,material parameters and load parameters on the horizontal load-displacement curves of the connections.The influence on the ultimate bearing capacity and initial stiffness is also discussed.The test and analysis results indicate that the blind bolted composite connections with square CFDST columns have good seismic performance and mechanical properties,and can be used in assembled composite frames in high intensity earthquake regions.The FE model built in this paper for this composite connection can be applied in the design and calculation of the assembled composite frames.

关 键 词：方套方中空夹层钢管混凝土柱 单边高强螺栓 端板连接节点 数值模拟 参数分析 

分 类 号：TU398[建筑科学—结构工程]