摘要
以大连星海湾跨海大桥主桥(跨径为460m)的悬索桥为工程背景,从理论和试验两方面研究了其动力性能.根据相似原理制作了1∶50缩尺比的模型试验,获得了其竖弯、横弯的频率,并利用有限元软件MIDAS建立了三维模型,对全桥进行了数值分析.通过试验和数值分析可以得出竖弯及横弯的校核系数均较为理想,表明双梁式计算模型可以应用到这种体系的动力分析计算中,以及实桥所采用的有限位移理论分析其动力特性,并进行抗风、抗震等设计是可靠的.
The dynamic performance of suspension bridge of Dalian Xinghai Bay Cross-sea Bridge is studied from theoretical and experimental aspects, which span is 460 m. A model of Dalian Long-span Suspension Bridge is made, which similarity scale is 1/50. During the experiment, the frequencies ratios of its vertical bending and transverse bending are identified. Furthermore, a three-dimensional dynamic finite element model using the software MIDAS is established for the full scale model. Comparing the results of the test and theoretical calculation, it shows that the dual-beam model can be applied to the dynamic analysis of such a system and using the FEM to analyze its dynamic characteristics and wind and seismic design is reliable.
出处
《沈阳大学学报（自然科学版）》
CAS
2013年第4期322-325,共4页
Journal of Shenyang University：Natural Science
关键词
悬索桥
模型试验
相似定理
动力分析
数值分析
suspension bridge
model test
similarity theorem
dynamic analysis
numerical analysis
