混凝土短期荷载下变形的一个本构模型

提出了一个混凝土一般应力状态下的变形模型。它建立在应变功硬化塑性增量流动理论的基础上，使用一个完整的二次型载荷函数，包含３个应力不变量，以模拟材料在拉、压应力偏量作用下的性质差异。为应用方便，文中详细列出数值计算步骤。

A constitutive model for short time loading of plain conerete

A general constitutive model has been developed in this paper to describe the nonlinear deformational behaviour of plain concrete materials. It is based on the classical incremental flow theory of work hardening plasticity. Three stress invariants are involved to simulate the difference of concrete properties under tensile and compressive deviatoric stress condition. Since the loading surface employed in this model is entirely quadratic, both the independent tension cutoff surface and volume dependent cap are not needed. The procedure for numberical computation has listed step by step in order to make the model easy to be applied.