大跨度CFRP缆索悬索桥的静力性能  

Study on static mechanics of long span suspension bridge with CFRP cable

作　　者：李扬[1] 

机构地区：[1]上海市政工程设计研究总院(集团)有限公司,上海200092

出　　处：《重庆大学学报（自然科学版）》2012年第8期26-33,共8页Journal of Chongqing University

基　　金：国家'863'高技术研究发展计划资助项目(2006AA11Z120)

摘　　要：基于分段悬链线法和通用有限元程序,提出了一套悬索桥静力性能分析的方法和步骤,并利用该方法对主跨为2 000～5 000m的悬索桥静力性能进行了对比研究,验证了CFRP缆索悬索桥的静力优势和可行性。针对此类桥型刚度较小的缺点,对跨径为2 000m的CFRP缆索悬索桥的刚度性能进行了参数分析,考虑的设计参数包括:桥跨布置方式、矢跨比、边中跨比、主梁抗弯惯矩、桥塔抗弯惯矩和中央扣。最后提出了改善结构刚度设计的建议。This paper proposes an analysis method for the static mechanics of suspension bridges based on segmental catenary and FEM software. A comparative research on mechanics of suspension bridge with a span of 2 000- 5 000 m is conducted according to the proposed method, and CFRP suspension bridges are proved advantageous and practicable. A parametric study for the deflection performance of 2 000 m CFRP suspension bridge is executed in order to enhance its stiffness, where the span arrangement, rise to span ratio, side to main span ratio, inertia of girder and tower, and the central buckle are considered, respectively. A serials of design suggestions for improving the structural stiffness are proposed.

关 键 词：悬索桥 碳纤维 CFRP 静力性能 刚度 参数分析 

分 类 号：U442[建筑科学—桥梁与隧道工程] U448.25[交通运输工程—道路与铁道工程]