碳纤维斜拉索的静力参数特性分析  

Characteristic analysis of CFRP cables in static parameters

作　　者：刘荣桂[1] 李成绩[1] 蒋峰[1] 龚向华[1] 

机构地区：[1]江苏大学土木工程系,江苏镇江212013

出　　处：《哈尔滨工业大学学报》2008年第4期615-619,共5页Journal of Harbin Institute of Technology

基　　金：国家自然科学基金资助项目(50178018)

摘　　要：为了探索碳纤维(CFRP)索预应力大跨结构在不同条件下的非线性力学行为,并为相应力学行为的控制及相应结构的开发应用提供依据,对CFRP斜拉索的静力特性参数如切线刚度、竖向分力、垂度等计算公式进行了推导,并与传统的钢绞线斜拉索的计算结果进行对比分析,计算结果表明:由于CFRP索的弹性模量和单位长度重量低于传统的钢索,CFRP斜拉索的等效刚度系数小于钢拉索,索的竖向分力等效系数在工程应力范围内接近1,垂度效应明显小于钢拉索.合理利用碳纤维(CFRP)索的这些静力特性(等效刚度的降低、垂度效应的减少)有助于相关新型结构的开发利用.To explore the nonlinear mechanic behaviors of pre - stressed greatly cross structures with CFRP cables under different conditions and provide some reference to the control method of corresponding mechanic behaviors and the practice of corresponding structures, the characters of CFRP cables in static parameters such as equivalent stiffness, vertical component of forces, sag effects were analyzed, For its low elastic modulus and weight of unit length, the equivalent stiffness coefficient of CFRP cables is lower than those of steel cables. These static characters will be helpful to the exploitation and application of related new structures.

关 键 词：CFRP 斜拉索 等效刚度 竖向分力 垂度 

分 类 号：U441.5[建筑科学—桥梁与隧道工程]