人行悬索桥抗风性能改善措施研究  

A Study on Improving Measures for Wind-Resistance Stability of Pedestrian Suspension Bridge

作　　者：白桦[1] 李德锋[2] 李宇[1] 刘健新[1] 

机构地区：[1]长安大学公路学院公路大型结构安全教育部工程中心,西安市710064 [2]中交第一公路勘察设计研究院有限公司,西安市710075

出　　处：《公路》2012年第12期1-6,共6页Highway

基　　金：国家自然科学基金资助项目;项目编号51078038;桥梁结构抗风技术交通行业重点实验室开放基金资助;项目批准号KLWRTBMC10-01;中国博士后科学基金资助项目;项目编号2011M501429;中央高校基本科研业务费专项资金资助;项目编号CHD2011JC003;CHD2011JC004

摘　　要：为解决人行悬索桥桥窄、刚度较小,抗风稳定性往往难以满足抗风规范要求的问题,以国内某人行悬索桥为研究对象,针对其静、动力抗风稳定性均不满足要求的现象,参考日本九重夢人行悬索桥抗风性能改善措施,通过数值计算和风洞试验研究了不同措施提高人行悬索桥抗风性能的效果,总结了人行悬索桥各种可行的抗风性能改善措施,提高了国内某人行悬索桥的抗风性能。研究结果表明:选用45°抗风缆、一联中央扣、降低矢跨比、加密桥面栏杆、设置中央稳定板等几种抗风措施可以提高人行悬索桥的抗风性能。In order to solve the problems of the pedestrian suspension bridges can t satlsfy tne neeos of wind-resistance stability because its narrow and stiffness is relatively smaller. The wind-resistant behavior of a pedestrian suspension bridge built in China is studied by using computational analysis and wind tunnel test. It is pointed that the static and dynamic wind-resistant behavior do not satisfy with the requirements. Refer to the research of measures improving for wind-resistance stability of Jiu-chongmeng pedestrian suspension bridge in Japan. The efficiency of different wind-resistant measures has been studied. The feasible improving measures for wind-resistance stability of pedestrian suspension bridge are summarized, and the wind-resistance stability of a pedestrian suspension bridge built in China is improved. The results show that in order to improve its wind-resistance behavior , 45° wind-resistant cable, single central buckle and the central stability board are installed, rise-span ratio is decreased, railing are encrypted, etc.

关 键 词：人行悬索桥 抗风性能 抗风措施 颤振 

分 类 号：U448.25[建筑科学—桥梁与隧道工程]