大跨度自锚式悬索桥的自振特性分析  

The vibration characteristics analysis of long span self- anchored suspension bridge

作　　者：陶庆东[1,2] 肖盛燮[2] 

机构地区：[1]绵阳职业技术学院建筑工程系,四川绵阳621000 [2]重庆交通大学土木建筑学院,重庆400074

出　　处：《四川建筑科学研究》2015年第2期170-174,共5页Sichuan Building Science

基　　金：国家自然科学基金项目(50879097)

摘　　要：运用数值积分法对自锚式悬索桥自振特性进行分析,通过改变自锚式悬索桥矢跨比、边跨与中跨比、桥面系质量、主梁刚度、主缆刚度变化、横梁数量及位置等结构参数,探讨其对自振特性的影响,结果表明,横梁数量及布置方式、矢跨比、主缆与吊杆抗拉刚度变化对自振特性的影响较大,自振频率随着桥面系质量、边跨与主跨的比值的增大而减小等自振特性规律,为大跨度自锚式悬索桥结构动力特性优化设计提供可靠的科学依据,具有重要的研究意义。Using the numerical integral method to analysis self-anchored suspension bridge＇s vibration characteristics, through changing the self-anchored suspension bridge＇s arrow cross ratio,the ratio different of side span and main span,the bridge deck system mass, the main beam stiffness, the main cable tensile stiffness, crossbeam numbers and location, bar tensile stiffness etc structure parameters, the paper discussed those effect on the natural vibration characteristics. The results show that ： crossbeam numbers and location, arrow cross ratio and bar tensile stiffness＇ change have a large effect on the natural vibration characteristics,with bridge deck system＇s quality, side span and main span ratio＇s increases, the natural vibration decrease etc vibration characteristics rules, providing a reliable scientific basis for Long span Self-anchored Suspension Bridge structure dynamic characteristic optimization design, having an important research significance.

关 键 词：自锚式悬索桥 自振特性 结构参数 

分 类 号：U448.25[建筑科学—桥梁与隧道工程]