摘要
采用解析法分析CFRP斜拉索的静力特性,发现CFRP拉索相对于钢拉索具有一系列优点:CFRP拉索在超大跨时采用切线模量计算的误差很小;相同条件下CFRP拉索的等效弹性模量比钢拉索的高得多,且拉索愈长,其间差别愈大;CFRP拉索的极限长度是钢拉索的5倍有余,或者说在承载效率一定的情况下,CFRP拉索的跨度为钢拉索的5倍;CFRP拉索的自重应力较小,在超大跨时其承受外荷载的比重仍很高。
The static characteristic of CFRP cables is analyzed and a series of advantages of CFRP cables are found when comparing with steel cables. The error of using tangent modulus for CFRP cables with super great spans is very small. The equivalent modulus of elasticity of CFRP with super great spans cables is much higher than that of steel cables and the cables are longer,the difference of them is bigger. The ultimate length of CFRP cables is five times of that of steel cables or if their carrying efficiency is fixed on a certain value,the span of CFRP cables is five times of that of steel cables. The deadweight stress in CFRP cables is relatively small and when the length of CFRP cables is super great,the proportion of carrying outside load with super great spans is still high.
出处
《中国公路学报》
EI
CAS
CSCD
北大核心
2004年第2期43-45,共3页
China Journal of Highway and Transport
基金
国家自然科学基金项目(6505001189)
国家自然科学基金重点项目(50238030)
国家高技术研究发展计划(863计划)资助项目(2001AA336010)
江苏省自然科学基金重点项目(BK2000036 1)
关键词
桥梁工程
CFRP拉索
解析法
静力特性
等效弹性模量
承栽效率
bridge engineering
CFRP cable
analytics
static characteristic
equivalent modulus of elasticity
carrying efficiency
