摘要
采用在空间上运用有限单元法与在时间上运用有限差分法相结合的方法,建立组合梁的火-结构耦合ANSYS分析模型;编制组合梁ANSYS热分析程序和全过程受火非线性分析程序,对组合梁在国际标准ISO834规定的标准火灾的温度场和挠度-时间曲线进行分析和计算.数值计算结果表明:在国际标准ISO 834规定的标准火灾下,试验梁测点的温度与ANSYS理论计算结果高度吻合,试验梁位移-受火时间曲线与理论计算结果符合良好.
To research the fire-resistant behavior of the composite beam in fire,an ANSYS model for fire-structure coupling analysis was established,by the method combining finite element method in space and finite difference method in time,and the temperature fields and the deflection-time curves of the composite beams under ISO 834 fire were numerically simulated and analyzed with the thermal-analysis ANSYS program and the nonlinear whole process analysis ANSYS program.The numerical results show： under ISO standard fire,the temperature of measuring point in tested beam is highly consistent with the ANSYS simulation result,and the curve between mid-span deflection and exposed-to-fire time of the tested beam is in good agreement with the theoretical result.
出处
《华侨大学学报（自然科学版）》
CAS
北大核心
2011年第3期317-321,共5页
Journal of Huaqiao University(Natural Science)
基金
国家自然科学基金资助项目(51008133)
福建省科技计划重点项目(2006H0030)
国务院侨办科研基金资助项目(07QZR04)
福建省厦门市科技计划项目(3502Z20073036)
关键词
薄壁U型钢
组合梁
火灾
火-结构耦合
ANSYS模拟
thin-walled U-section steel
composite beam
fire
fire-structure coupling
ANSYS simulation
