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为研究曲率模态参数在吊杆损伤状态下的响应情况,以某钢管混凝土拱桥为研究对象,进行基于曲率模态的吊杆损伤识别模拟.利用ANSYS软件建立桥梁有限元模型并得到其动力特性,模拟各种不同工况,比较结构曲率模态参数的变化情况.结果表明:采用曲率模态指标可以识别吊杆损伤位置,综合考虑多阶振动情况下的平均曲率模态指标可以提高识别的准确性,并初步估计损伤程度;多吊杆损伤情况可以看成单一吊杆损伤情况的累加.
In order to study the response of curvature modal parameters to boom damage, a concrete-filled CFST arch bridge was used to simulate boom damage identification based on curvature modal.The bridge finite element model was established by ANSYS software and its dynamic characteristics , And simulate different working conditions to compare the changes of the modal parameters of the curvature of the structure.The results show that using the curvature modal index to identify the damage location of the boom, considering the average curvature modal index under multi-stage vibration can improve the recognition of Accuracy, and a preliminary assessment of the degree of damage; multi-boom damage can be seen as a single boom damage accumulation.