摘要
为研究碳纤维索斜拉桥的静动力学行为,本文在已有研究成果基础上,结合国内首座碳纤维拉索试验桥的静动力试验,对其进行了详细的性能分析。文中介绍了静力试验和动力试验的主要内容和方法,并将该桥应力(应变)、变形及计算频率和振型的实测结果与该桥三维有限元模型的计算结果进行了对比分析。分析结果表明,结构的静力行为与理论计算结果基本吻合,桥梁刚度和承载能力满足设计要求,整体工作性能良好,动力试验实测的计算频率和振型结果与有限元分析模型的分析结果在低频段也基本吻合。研究结果可为碳纤维索应用于跨度更大的斜拉桥的研究和实践提供参考。
The analysis is aimed at the static and dynamic behavior of cable-stayed bridge using CFRP cables.Based on some recent research,detailed analysis is given to the first cable-stayed bridge with CFRP cables in China based on the static and dynamic test.The major contents and methods of static and dynamic test for the bridge are presented,and the stress and deflection behavior of the bridge structure and calculation frequency and vibration modes measured in the tests are compared with the results calculated by three-dimensional finite element model of the bridge.The analysis show that the static behavior of the bridge is basic near the calculation result,both the structural rigidity and carrying capacity thereof can satisfy the design requirements,working performance of the bridge is excellent,and frequency and vibration modes measured in the dynamic test are also near the calculation results in low frequency.The results in question may provide reference to research and practice for CFRP cables used in building longer span cable-stayed bridges.
出处
《四川建材》
2012年第6期76-78,90,共4页
Sichuan Building Materials
关键词
斜拉桥
碳纤维索
静力试验
动力试验
有限元
cable-stayed bridge
CFRP cable
static test
dynamic test
finite element
