Thermal Simulation Analysis Of Cfstc Under High Temperature And The Calculation Of Thermal Force

Concrete filled steel tubular columns is one kind of combinational material, which have better seismic,fire resistance and high economic efficiency. In this text, we will analyse concrete filled steel tubes for the temperature field and high temperature performance from the following areas:(1) Based on the ABAQUS software, the temperature field of concrete filled steel tubular columns structures under the different curve of ISO-834 standard fire curve and the rapid warming curve will be analysed,compared with the experiment, and finally the impact factors of temperature field will be discussed.(2) According to simplified calculation method of thermal force of concrete filled steel tubular columns , both ends of which fixed entirely , one practical formula for calculating the internal thermal force will be found, and the various impact factors of thermal force will be discussed.(3)On the basis of the analysis of temperature field, the mechanical property of concrete filled steel tubular columns under high temperature will be discussed , the ultimate bearing capacity of concrete filled steel tubular columns under fire and its effect factors will be analysed.