The Simulation Analysis On The Seismic Behavior Of Fired R.C. Frame Columns

Occurrence frequency of building fire is so high that people's lives and property have confronted the serious threat. In recent years, large much of commercial houses with the bottom framed structure have crowded many cities. Because of frequent market fires and tremendous damage, people are paying more attention to fire disaster.In this paper, the author sums up the thermal property and mechanical property at high temperature of concrete and steel material, expounds the theory of temperature field numerical calculation and reinforced concrete non-linear finite element analysis method, and designs numerical experiment model of R.C. frame column. Then, the numerical analysis theory of thermal-structure coupling in ANSYS finite element method is commented by this paper, and the feasibility of thermal-structure coupling function in ANSYS procedure is verified by experiment result. Using the thermal-structure coupling function of ANSYS, this paper analyses the temperature field of R.C. frame columns with four surfaces heated and the seismic behavior of fired R.C. frame columns, discusses the effects of section dimension and stirrup ratio on the temperature field of R.C. frame members and the influence of different cross section dimension different stirrup ratio, different axial compressive ratio on the seismic behavior of fired R.C. frame columns. Specifically for the fire in bottom frame, the estimating method of seismic capacity in fired bottom R.C. frame columns have discussed.