大跨度斜拉桥斜置阻尼约束体系参数设计  

Parameter Design for Obliquely Set Viscous Damper Restraint Systems of Long Span Cable-Stayed Bridges

作　　者：马长飞 汪正兴 王胜斌[3] 王波 荆国强 MA Chang-fei;WANG Zheng-xing;WANG Sheng-bin;WANG Bo;JING Guo-qiang(China Railway Bridge Science Research Institute,Ltd.,Wuhan 430034,China;State Key Laboratory of Bridge Structure Health and Safety,Wuhan 430034,China;Anhui Transport Consulting ＆ Design Institute Co.,Ltd.,Hefei 230088,China)

机构地区：[1]中铁大桥科学研究院有限公司,湖北武汉430034 [2]桥梁结构健康与安全国家重点实验室,湖北武汉430034 [3]安徽省交通规划设计研究总院股份有限公司,安徽合肥230088

出　　处：《桥梁建设》2018年第5期33-37,共5页Bridge Construction

基　　金：湖北省技术创新专项项目(2018AAA029);湖北省自然科学基金项目(2016CF51)~~

摘　　要：芜湖长江公路二桥主桥为主跨806m的双塔四索面斜拉桥。为改善桥梁横桥向与顺桥向抗震性能,该桥采用斜置阻尼约束体系。采用MIDAS Civil软件建立全桥有限元模型,采用非线性规划法优化粘滞阻尼器的力学性能参数;根据该桥在温度作用、汽车荷载、汽车制动力、风荷载、地震作用等荷载及荷载组合作用下的结构响应,确定粘滞阻尼器的极限变位状态,并根据该极限变位状态计算粘滞阻尼器的极限位移参数。该桥斜置阻尼约束体系的设计参数分别为:阻尼器速度指数α=0.25、阻尼系数C=3 000kN/(m/s)0.25、最大阻尼力Fmax=2 200kN,行程±550mm、水平转角±15°、竖向转角±5°。The main bridge of the Second Wuhu Changjiang River Highway Bridge is a cablestayed bridge with double pylons, four cable planes and with the main span of 806 m. To improve the seismic performance of the bridge in the longitudinal and transverse directions, the obliquely set viscous damper restraint systems were employed. The finite element model for the whole bridge was created using the software MIDAS Civil, firstly the mechanical property parameters of viscous dampers were optimized by employing nonlinear programming method, then the responses of the bridge were analyzed under earthquake ground motions, wind vibration, braking force and temperature effect, and the limiting position of the viscous dampers was evaluated under different load combinations. Finally, according to the limiting position of the viscous dampers, the parameters of the obliquely set viscous damper restraint system were designed as follow：velocity exponent a =0.25, damping coefficient C =3 000 kN/（m/s）0.25, maximum damping force F 2 200 kN, stroke ± 550 mm, horizontal rotational range ± 15°, and vertical rotational range ± 5°.

关 键 词：斜拉桥 斜置阻尼约束体系 粘滞阻尼器 参数优化 参数设计 有限元法 

分 类 号：U448.27[建筑科学—桥梁与隧道工程] U441.3[交通运输工程—道路与铁道工程]