超大跨径CFRP缆索悬索桥静力性能  

Static characteristics of suspension bridge with CFRP cables

作　　者：梅葵花[1] 费增乾 孙胜江[1] 毕银博[1] 

机构地区：[1]长安大学桥梁与隧道陕西省重点实验室,陕西西安710064 [2]湖州市交通工程质量监督站,浙江湖州313000

出　　处：《长安大学学报（自然科学版）》2013年第3期42-47,共6页Journal of Chang’an University(Natural Science Edition)

基　　金：国家自然科学基金项目(50908016)

摘　　要：为研究超大跨径CFRP缆索悬索桥的静力特性,并比较其与传统钢悬索桥静力性能的区别,探索性设计了主跨分别为2 000m、3 000m的CFRP缆索悬索桥和钢缆索悬索桥,以及主跨为5 000m的CFRP缆索悬索桥,采用有限元法对比分析了这几种悬索桥在恒载、汽车荷载以及温度作用下的内力和变形。结果表明:在恒载作用下,随着跨径的增大,结构内力迅速增大,且跨径越大增长速度越快,相同跨径条件下,CFRP缆索悬索桥主缆张力、吊索平均索力均小于钢缆索悬索桥的相应值,但加劲梁最大弯矩值略大;在汽车荷载作用下,CFRP缆索悬索桥的竖向位移稍大于钢缆索悬索桥的相应值;在温度作用下,CFRP缆索的内力增量和竖向位移较钢缆索的相应值小很多。In order to study the static behaviors of super-span suspension bridges with CFRP cables and compare them with those with traditional steel cables,suspension bridges with main span of the 2 000 m and 3 000 m with CFRP cables and steel cables and 5 000 m suspension bridge with CFRP cables were designed respectively.The internal force and deformation under the action of dead load,vehicle load and temperature were analyzed with the finite-element method.The results show that the structural internal force increases quickly with the increase of the span and the larger span,the higher the increase rate.The main cable tension and average suspender force of CFRP cable suspension bridges are less than those of the steel cable suspension bridges with the same span,but the stiffening girder moment of the former is slightly larger than that of the later when they are under the action of dead load.The vertical displacement of the CFRP cable suspension bridges is slightly larger than that of the steel cable suspension bridges when they are under the action of vehicle load.The internal force and the vertical displacement of the CFRP cable suspension bridge are much smaller than those of the steel cable suspension bridges when they are under the action of temperature.2 tabs,11 figs,13 refs.

关 键 词：桥梁工程 悬索桥 静力特性 有限元法 CFRP缆索 温度效应 

分 类 号：U448.25[建筑科学—桥梁与隧道工程]