基于能量损失的混凝土损伤模型

Concrete Damage Model Based on Energy Loss

从能量损失的角度出发,提出了一种运用辛普生积分方法进行计算的混凝土损伤模型,推导了混凝土损伤变量D的通用计算公式.通过对典型的混凝土受压和受拉应力-应变关系曲线计算表明,所提出的混凝土损伤变量计算公式不仅能较好地描述混凝土损伤随应变增长的变化规律,而且还具有简单、实用、精度较高等优点.

The establishment of the concrete damage model is the base for analyzing the concrete structure damage. In the paper, a concrete damage model calculated by the Sinpson integral method is put forward in terms of energy loss. And a universal calculation formula for concrete damage variable D is proposed. The calculation for the typical stress-strain curves of concrete shows that the proposed formula for concrete damage variable based on energy loss can not only describe the changing law of the concrete damage increasing with the strain, but also has the advantage of more simple and practical. The results have enough precision.