DAMAGE AND REINFORCEMENT MEASURES OF CONCRETE-FILLED STEEL COLUMNS
To address the damage of concrete-filled steel columns caused by frost heave,this study combines field investigation data and observations of frost heave crack patterns to assess the damage of affected columns.It devel-ops a reinforcement plan and uses ANSYS finite element software to simulate temperature fields and temperature stresses in the concrete of the columns during freeze-thaw cycles.The results show that the combination of frost heave forces and loads generates circumferential stresses in the steel tubes that exceed their ultimate tensile stress,leading to brittle failure.Reinforcement by increasing the cross-section and changing the column-to-column corner braces from unidirectional to"X"braces improves the overall integrity and stiffness of the structure effectively.The study also includes ANSYS-based finite element analysis of temperature stresses in the columns under freeze-thaw cycles.Finally,recommendations are provided to prevent similar frost heave damage in future projects for discussion.
万方数据
维普
