结构工程师2025，Vol.41Issue(3)：9-15,7.DOI:10.15935/j.cnki.jggcs.202503.0002
外包式钢柱基础的力学行为研究
Research on Mechanical Behavior of Steel Column Footing Wrapped with Concrete
摘要
Abstract
Steel frame structure is the preferred structural form for 110 kV and 220 kV indoor substations.The connection between steel columns and foundations is crucial for the mechanical behavior of steel frame structures.The steel column base wrapped with concrete exhibits high load-bearing capacity,enhanced stiffness,and construction expediency.However,the force mechanism under bending and shear action is complex,and the interaction between steel columns and wrapped concrete changes continuously with the development of horizontal bending deformation of steel columns.Finite element modeling analysis was conducted on the steel column base,with main influencing parameters including wrapped height,load form,axial compression ratio,etc.The numerical simulation results show that the proposed cohesive model can accurately simulate the mechanical behavior of the wrapped steel column base.The column base with lower wrapped height can experience local buckling of the compression flange under bending,leading to a decrease in the structural bearing capacity.The top and bottom surfaces of the wrapped concrete may experience significant shear forces.Accordingly,it is not enough to only densify the top stirrups according to the specifications,and it is also necessary to strengthen the stirrups at the bottom end.关键词
钢框架变电站/外包式钢柱脚/有限元模型/弯剪作用/外包高度Key words
steel frame substation/wrapped steel column base/finite element model/bending shear effect/wrapped height分类
建筑与水利引用本文复制引用
肖波,景川,王晓玉,李勇,高向玲..外包式钢柱基础的力学行为研究[J].结构工程师,2025,41(3):9-15,7.基金项目
国网河南省电力公司科技计划(5217L023000A) （5217L023000A）
