摘要
应用ANSYS有限元分析软件对一个单跨三层钢框架分别进行恒活荷载、风荷载和地震作用三种损伤工况下的模拟设计,然后对试件进行三种工况下的缩尺动力试验。运用DASP动态试验仪进行动力试验之后采集和处理数据,再运用特征实现算法(ERA)进行模态分析。研究结果表明:不同损伤工况下结构的频率、振型和阻尼都不同;并且在同一框架的不同损伤位置处频率和阻尼也会发生变化;试验结果与ANSYS模拟分析设计出的损伤位置和损伤程度较吻合。
The finite element analysis software ANSYS is used to analyse the single span three-story steel frame under the dead load,live load,wind load and earthquake,and the reduced-scale experimens under the three working conditions are carried out. The DASP dynamic testing instrument is used to conduct the modal test and collect data,then the eigensystem realization algorithm（ERA） is used to achieve the modal analysis. The results show that the frequency,the vibration mode and the damping of structure are different in different conditions,and the frequency and damping change at the different damage position in the same frame. The damage position and degree that calculated by ANSYS are in good accordance with the experiment results.
作者
周奎
方早
潘梦阳
Zhou Kui, Fang Zao, Pan Meng-yang(School of Environment and Architecture, University of Shanghai for Science and Technology, Shanghai 200093, Chin)
出处
《工程抗震与加固改造》
北大核心
2018年第1期57-64,共8页
Earthquake Resistant Engineering and Retrofitting
关键词
单跨三层钢框架
损伤工况
缩尺试验
特征实现算法(ERA)
模态分析
single span three-story steel frame
the damage conditions
reduced-scale experiment
eigensystem realization algorithm
modal analysis
