摘要
某在建斜拉桥在悬浇主跨最后一个主梁节段时,发生了斜拉索脆断的偶然事故,形成的冲击荷载引起斜拉桥的剧烈振动。用有限元方法对这一过程进行了非线性数值分析,计算了结构内力和位移的时程响应,动力分析结果表明,斜拉索脆断引起的结构振动对结构安全没有构成威胁。
For some cable-stayed bridge,when the last segment of main span girder is being constructed in the state of cantilever,a brittle fracture of the cable occurred.The impact load caused by this brittle fracture resulted in severe vibration.The non-linear vibration analysis of the bridge in the whole process has been carried out by means of finite element method,and meanwhile the time history responses of structural internal force and displacement has been calculated.Dynamic analysis results show that the peak internal force and displacement,caused by brittle fracture of cable stayed,do not threaten the safety of the bridge.
出处
《武汉理工大学学报》
CAS
CSCD
北大核心
2010年第9期360-363,共4页
Journal of Wuhan University of Technology
关键词
斜拉桥
冲击荷载
振动
非线性分析
时程响应
cable-stayed bridge
impact load
vibration
nonlinear analysis
time history response
