摘要
为研究特大跨度碳纤维索(CFRP)斜拉桥的抗震性能,以主跨为1700m的钢斜拉桥为例,运用三维非线性有限元理论进行抗震性能分析。分析结果表明,特大跨度斜拉桥采用碳纤维索后:(1)减小了桥梁的最大内力值,改善了结构的受力状态;(2)桥梁的变形特征基本接近。因此,从抗震性能方面考虑,特大跨度斜拉桥采用碳纤维索是可行的,斜拉索截面的确定建议采用等刚度的方法。
To understand the seismic stability of carbon fiber reinforced polymer （CFRP） cables for cablesupported bridges, based on a cable-stayed bridge with main span of 1 700m, cable-stayed bridges with CFRP stay cables are designed, in which the cable＇s cross-sectional area is determined by the principles of equivalent cable strength and stiffness, by using the 3D nonlinear finite element analysis , seismic behavior of the cablesupported bridges are numerically investigated.The results shows that：（1）compared with the case of using steel cables, the bridge using CFRP cables has smaller internal forces.（2） the deformation is basically the same therefore as far as seismic stability is concerned, the use of CFRP cables in super long-span cable-supported bridges is feasible ,the cross-sectional area Of CFRP cables should be determined by the principle of equivalent axial stiffness.
出处
《建筑技术》
北大核心
2010年第1期60-63,共4页
Architecture Technology
关键词
斜拉桥
碳纤维索
抗震性能
cable-supported bridge
CFRP cables
seismic stability
