箱形梁混凝土热物理参数反分析试验研究

Back-Analysis and Experiment Research of Thermal Physics Parameter of Concrete Box Girder

有限元法分析箱形梁混凝土温度场应力场及其耦合 ,热物理参数对计算结果影响较大。为了选取接近实际的混凝土热物理参数 ,根据 Fourier热传导理论和边界条件 ,利用差分原理推导出混凝土热物理参数方程 ,设计箱形梁温度测设方案实测温度 ,对混凝土的热物理参数进行反分析 ,可得更符合实际的参数。

thermal physics parameters affect heavily the result when Finite element method is used to analyze temperature field of concrete box girder. In order to choose these thermal physics parameters that are close to practice, according to Fourier thermal conduct theory and state, this paper derives parameter equations and designs to detect temperature data, and calculates thermal physics parameter of concrete with back-analysis method.