混凝土非线性热力学多轴本构模型中的坍塌和爆炸理论

A Collapse and explosion theory in the Nonlinear Thermal-mechanical Multi-axial Constitutive Model of Concrete

在排灌站混凝土结构中，由于温度和外载常呈现出波动变化，在事故状态下材料会不断地发生硬化和软化。判断材料状态是硬化还是软化历来是结构分析计算中的难点。本文提出了混凝土粘塑性加载面和塑性加载面的坍塌和爆炸理论，有效克服了这一难点。

For the concrete structures used in irrigation and drainage pumping station, as the temperature and the out loads changed wavely, the material state can be strain hard-ened or strain softed in fault cases. It's diffcult to determine whether the material state is strain softed or not, According to this condition, we proposed the collapes and explosion of the visco-plastic loading surface and the plastic loading surface, by which the material state about strain hardening can be determined easily