摘要
CFRP筋具有轻质高强、抗疲劳和耐腐蚀等性能,特别适合用作缆索材料.为了探讨CFRP索在缆索支承桥梁中应用的可能性,以润扬长江大桥和1400 m主跨斜拉桥设计方案为工程背景,采用缆索等强度和等轴向刚度的方法分别拟定了相同跨径布置应用CFRP索的悬索桥和斜拉桥,并运用三维非线性抗风分析方法对其进行了空气静力特性和动力稳定性分析.结果表明:从抗风性能角度而言,缆索支承桥梁采用CFRP索是可行的,但缆索截面尺寸建议采用等轴向刚度的方法来确定.
Due to its high tensile strength, small mass density, excellent corrosion and fatigue- resistant ability, CFRP is most suitable for application as cables in cable-supported bridges. To gain understanding of the applicability of carbon fiber reinforced polymer（CFRP） cable in cable- supported bridges, based on the Runyang Bridge and a cable-stayed bridge with main span of 1400 m, suspension bridges with CFRP cables and cable-stayed bridges with CFRP stay cables are schemed, in which the cable＇s cross-sectional area is determined by the principles of equivalent strength or equivalent axial stiffness. Numerical investigations on the aerostatic and aerodynamic stability of the bridges are conducted by 3D nonlinear wind-resistant analysis. The results shows that viewed from the aspect of wind-resistant performance, the use of CFRP cables in cable- supported bridges is feasible, and the cable＇s cross-sectional area should be determined by the principle of equivalent axial stiffness.
出处
《浙江工业大学学报》
CAS
2008年第5期572-577,共6页
Journal of Zhejiang University of Technology
基金
浙江省自然科学基金项目(502118
Y104577)
关键词
缆索支承桥梁
CFRP索
抗风性能
cable-supported bridges
CFRP cable
wind-resistant performance
