钢筋混凝土梁柱损伤扩展模型  

Damage Spread Model of Reinforced Concrete Beam Column

作　　者：宁超列[1] 李杰[1,2] 

机构地区：[1]同济大学土木工程学院,上海200092 [2]同济大学土木工程防灾国家重点实验室,上海200092

出　　处：《同济大学学报（自然科学版）》2012年第12期1747-1752,共6页Journal of Tongji University:Natural Science

基　　金：国家自然科学基金委创新研究群体科学基金(50621062)

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Gauss Radau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.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.

关 键 词：钢筋混凝土梁柱构件 柔度法模型 损伤扩展 

分 类 号：O313.7[理学—一般力学与力学基础]