基于链杆与调频质量阻尼器组合的人行桥减振技术  

Damping Technology of Footbridge with Combination of Connecting Rod and Tuned Mass Damper

作　　者：杨勇[1] 宁平华[1] 乐小刚[1] 

机构地区：[1]广州市市政工程设计研究院,510060

出　　处：《特种结构》2014年第3期69-73,118,共6页Special Structures

摘　　要：本文针对大跨度人行桥行人行走舒适性问题,以绵阳市三江大桥为例,提出了基于连杆与调频质量阻尼器组合的人行桥减振技术。为验证减振效果,实桥测试了该桥的动力特性和人群行走下的动力响应,结果表明理论计算与实际吻合较好,人群行走时最大水平加速度只有0.08m/s^2。实测表明基于链杆与调频质量阻尼器组合的减振技术是可行的,该组合减振技术既不影响结构的美观和整体受力情况,避免了大量采用TMD减振系统而提高造价,又能够达到满足人行舒适性的目的。On the comfort of long-span footbridge when pedestrians were walking on it, taking Sanjiang Bridge in Mianyang as an example, damping technology o f footbridge with combination of connecting rod and tuned mass damper were put forward. Meanwhile, its dynamic characteristics and the dynamic response under the crowd walking was tested, and it was obtained that the theoretical calculation is similar to field measurement. The maximum horizontal acceleration is0. 08m/s2 when the crowd are walking. Researches showed that the damping technology of footbridge is feasible, which can reduce footbridge vibration. It neither affects the beauty of structure nor the overall stress condition to avoid the high cost for large use of TMD damping system.

关 键 词：人行桥 链杆 调频质量阻尼器 减振 试验 

分 类 号：U441.3[建筑科学—桥梁与隧道工程] U448.11[交通运输工程—道路与铁道工程]