郭家沱长江大桥非线性粘滞阻尼器参数研究  

Study on Non-linear Viscous Damper Parameters of Guojiatuo Yangtze River Bridge

作　　者：黄康[1] 

机构地区：[1]招商局重庆交通科研设计院有限公司,重庆400067

出　　处：《公路交通技术》2016年第6期32-37,共6页Technology of Highway and Transport

基　　金：交通运输部建设科技项目(2013318282310)

摘　　要：郭家沱长江大桥全长1 403.8 m,初步设计方案主桥采用单孔悬吊双塔3跨连续钢桁梁悬索桥,桥跨布置为75 m+720 m+75 m=870 m;两岸引桥均采用预应力混凝土连续箱梁,北引桥跨径布置为4×43 m,南引桥跨径布置为3×43 m+4×43 m。郭家沱长江大桥在纵向为漂浮体系,在地震作用下主梁纵向位移较大,这种情况下若在塔梁连接位置设置纵向阻尼器,则既可以达到减小主梁纵向位移,又可以对主塔内力产生影响。针对不同阻尼器参数,综合研究其对主塔内力和主梁位移的影响。Guojiatuo Yangtze River Bridge has a full length of 1 403. 8 m,in basic design,the main bridge is a single-hole suspended twin-tower 3-span continuous steel truss girder suspension bridge,the span arrangement is 75 m ＋ 720 m ＋ 75 m = 870 m; Prestressed concrete continuous box girders are used on both sides approach bridge,the northern approach bridge span is（4 × 43） m,the southern approach bridge span is（3 × 43 ＋ 4 × 43） m. Guojiatuo Yangtze River Bridge is floating system in longitudinal,the main beam has relatively big longitudinal displacement under seismic force. In this case,arrange longitudinal damper at the connection position of the tower girder,it can not only reduce the longitudinal displacement of the main beam,but also have an impact on the internal force of the main tower. This paper studies influence of different damper parameters on internal fstress of the main tower and main beam displacement.

关 键 词：悬索桥 公轨两用 抗震 粘滞阻尼器 非线性时程 

分 类 号：U448.25[建筑科学—桥梁与隧道工程]