摘要
为了获取基于结构动力特征的小损伤识别方法,组织实施了钢直管、钢壳及5层钢框架结构的损伤识别试验。试验结果表明,以"频率比"作为结构损伤诊断指标对于识别均匀、规整的一维(杆、索)、二维(板、壳)以及三维钢框架结构的损伤十分敏感;该指标对识别钢直管纵向大损伤及3mm横向切口的小损伤;对钢壳径向损伤及环向损伤,对5层钢框架结构的节点螺栓脱落损伤均敏感有效。
In order to obtain the small damage detection method based on structural dynamic features, steel pipe, steel shell and five stories steel frame structure model tests were carried out. According to the experiment results, it is clear that the diagnostic parameter frequency ratio is effective for uniform and regular structure in structural dam- age detection, such as bar and cable structures, plate and shell structures, three dimensional framed structure, and so on. Model tests prove that the frequency ratio is effective on detecting the 3mm width transverse crack damage of steel pipe and radial or circular damage of steel shell. In the damage detection test of five stories steel frame struc- ture, the parameter also successfully diagnosed the damage caused by bolts shedding off from the node of model
出处
《世界地震工程》
CSCD
北大核心
2014年第1期69-76,共8页
World Earthquake Engineering
基金
科技部地震行业专项资助项目(200808021)
国防技术基础计划项目资助(Z312012B001)
关键词
频率比
结构损伤诊断
振动测试
小损伤
frequency ratio
structural damage diagnosis
vibration measurement
small damage
