钢筋混凝土梁柱损伤扩展模型

Damage Spread Model of Reinforced Concrete Beam Column

摘要:

从钢筋混凝土梁柱构件的损伤扩展过程出发，在加载过程中动态计算并更新模型的损伤区长度，同时结合修正的2点GaussRadau积分方案保证损伤区长度范围内仅包含1个积分点，避免了Scott和Fenves分段纤维梁柱模型的塑性区长度敏感性问题.钢筋混凝土悬臂柱的试验与数值对比分析表明，本文模型不仅具有较好的计算精度，而且能够模拟钢筋混凝土梁柱构件的损伤扩展.

Abstract:

Based on the damage spread process of reinforced concrete beam column member, the damage spread model adjusts the length of damage zone in every loading step. The modified Gauss Radau integration scheme is employed to assure one integration point in the field of the damage, the plastic zone length issue of the segmented fiber beam column raised by Scott & Fenves is avoided. In the end, the comparison between the theoretical and experimental results of a reinforced concrete column verifies that with the model, rational results can be obtained, and the damage spread of reinforced concrete beam column member can be simulated.