摘要
对火灾下钢筋混凝土剪力墙的温度场进行了有限元计算分析,得到了剪力墙截面温度场分布规律,计算结果与试验结果符合较好。在此基础上,分析了混凝土热工参数、迎火面对流系数及综合辐射系数对混凝土剪力墙温度场的影响。结果表明:已有文献给出的混凝土热工参数对剪力墙温度场影响不大,但是温度场对迎火面对流系数及综合辐射系数的变化较为敏感。
The thermal field of reinforced concrete shear wall under fire is analyzed by finite element analysis software ANSYS and the section temperature distribution is obtained.Moreover, the numerical and experimental results are compared and a good agreement is shown.Based on the finite element model, a developed parametric analysis is undertaken,in which thermal properties of concrete, convection coefficient and radiation factor of the exposed surface are taken into account.The results indicate that thermal properties of concrete given by the related documents have lit- tle effect on temperature field.However, temperature distribution is sensitive to changes in convection and radiation factors of the exposed side.
出处
《混凝土》
CAS
CSCD
北大核心
2010年第1期4-6,共3页
Concrete
基金
高等学校博士学科点专项科研基金资助课题(200801410005)
关键词
火灾
剪力墙
温度场
热工参数
对流系数
综合辐射系数
fire
shear wall
temperature field
thermal parameters
convection coefficient
combined radiation factor
