【作者】 于海丰； 张耀春； 杜守军；

【Author】 Yu Haifeng~(1,2),Zhang Yaochun~2,Du Shoujun~1 (1.School of Civil Engineering,Hebei University of Science and Technology,Shijiazhuang,Hebei 050018,China; 2.School of Civil Engineering,Harbin Institute of Technology,Harbin,Heilongjiang 150090,China)

【机构】 河北科技大学建筑工程学院； 哈尔滨工业大学土木工程学院；

【摘要】 借助ABAQUS以及FE-SAFE软件,采用三种多轴临界面损伤模型(主应变、最大剪应变、Brown-Miller组合应变模型),对19根Q235材质的焊接工字形钢支撑的低周疲劳性能进行了数值模拟研究。结果表明,三种临界面损伤模型的预测寿命基本位于4倍分散带以内,偏于安全一侧。这也证实了采用数值方法对具有不同几何特征钢支撑的低周疲劳损伤进行模拟是可行的。更多还原

【Abstract】 Numerical simulation of the low-cycle fatigue damage and crack initiation lives for nineteen welded I-section Q235 steel bracing members is conducted by using the ABAQUS and FE-SAFE softwares based on the critical plane damage models,including the principal strain,maximum shear strain and Brown-Miller combined strain damage models.The results show that,the predicted low-cycle fatigue lives by the three damage models safely fall within a scatter band of four. These results also prove that these numerical methods can be used to study low-cycle fatigue behaviors of the bracing members with different geometry properties.更多还原