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.
Journal of Building Materials