火灾下型钢混凝土异形柱温度场分析

为了分析型钢混凝土异形柱的耐火极限及火灾后的力学性能,为试验研究做好充分的前期准备,本文采用有限元分析软件ANSYS对型钢混凝土异形柱截面温度场进行数值模拟,得出了柱截面在不均匀受火情况下的温度场分布规律。结果表明,在两面受火的情况下,L形柱的凹角处的温升低于其它部位;由于型钢的存在,加快了柱截面内部温度的热传导;距离受火面相同的深度处的混凝土与型钢的温度不同,因此有必要研究损伤差异对承载力和两者粘结滑移造成的影响。

Temperature Field Analysis of Steel Reinforced Concrete Special-shaped Columns

In order to analyze the fire resistance and mechanical properties of steel reinforced concrete(S.R.C) special-shaped columns and to make full preparation for the experimental studies,this study calculated the sectional temperature field of the S.R.C special-shaped columns using the finite element analysis software ANSYS.The distribution feature of temperature field under non-uniform fire condition was obtained.Results show that the temperature rising at the concave is lower than other parts of the columns with two sides exposed to fire.The steel can speed up the heat conduction in the column.The temperature of concrete and steel are different at the same site.It is suggested that the effect of damage difference on the bearing capacity and slipping between shaped-steel and concrete of the column needs to be studied in detail.