基于能量变分原理的双层板层间温度应力计算

Computation of Thermal Interface Stress in Two-Layer Concrete Slab Based on Energy Variation Principle

分析了双层板之间相互作用,以及层间约束对双层板变形的影响,在Goodman模型的基础上,用切向约束刚度和法向刚度模拟层间约束,运用能量变分原理导出了双层板平衡微分方程,提出了层间约束力计算双层板层间温度应力的计算方法。

In order to calculate thermal interface stress,interaction of two-layer slab and interface restrain impaction of two-layer deformation are analyzed. Based on Goodman model ,tangent restrain module and normal restrain module are used for simulating constraints between two-layer slab. The balanced differential equation has been deduced by virtue of energy variation principle. The computation method of interface force has been proposed.