摘要
利用ANSYS有限元软件建立1座双索面斜拉桥的有限元模型,分析了其模态振型的特征和地震时程响应,找出了该桥主梁弯矩响应最大的截面;同时分析了影响地震弯矩响应与主梁抗弯承载力的模糊因素;然后分别利用常规可靠性分析的验算点法与模糊可靠性分析的区间数转化法对该桥主梁的抗弯强度进行了分析,结果指出该桥主梁在地震中有较好的安全性.
Using ANSYS finite element software this paper establishes one pairs of cableplane cable-stayed bridge of finite element model, analyses the characteristics of the vibration mode and the seismic time-history of the bridge and then finds out the max section of the moment of the bridge＇s main beam. At the same time, it analyses the fuzzy factors of the seismic moment reaction and the main beam bending capacity. In conclusion, it analyses the bending strength of the cross-section by using the analysis of fuzzy reliability and the analysis of conventional reliability respectively. The results show that the main beam of the bridge has good security in the earthquake.
出处
《青岛理工大学学报》
CAS
2010年第1期38-43,共6页
Journal of Qingdao University of Technology
关键词
桥梁工程
地震
模态分析
时程分析
模糊可靠性
bridge engineering
earthquake
model analysis
time-history analysis
fuzzy reliability
