混凝土的一种内时本构模型

An Endochronic Constitutive Model of Concrete

本文根据连续介质的不可逆热力学原理,提出混凝土的一种内时本构模型,利用破坏准则形成本构方程.本模型对具有不同f^0的混凝土都成立,只需个别确定模型中的材料参数;对混凝土的一些重要性能,如非线性性质、应变软化性质和剪胀性质,都能得到描述.本文分析结果表明,内时理论适用于混凝土一类材料.

Based on the irreverslble thermodynamic theory of continuous media, an endochronic constitutive model of plain concrete is proposed. The failure surface of concrete is used to form constitutive equations and some important behaviors of concrete, such as nonlinear property, strain-softening property and dilatancy property, are predicted. The results are successfully compared with available experimental data. The model is aimed at concrete under short term loading. It is valid for concrete with different f'。, provided that the parameters of materials in the model are determined individually. This paper comes to the conclusion that the endochronic theory can be used for concrete materials.