厦漳跨海大桥北汊主桥斜拉索外置式阻尼器及其参数分析

简要介绍厦漳跨海大桥工程概况,阐述国内外对斜拉索振动及振动控制的研究.针对厦漳跨海大桥北汊主桥超长拉索柔性大、内阻尼低、固有频率分布广,极易在风、风雨和支承端位移等激励下发生振动的特点,从斜拉索振动频率分析、阻尼器安装高度确定、粘性体粘度选择、阻尼器箱体大小计算等几方面进行分析,最终选择粘性剪切型阻尼器作为斜拉索外置式阻尼器来保证斜拉索安全.

Analysis for External Damper for Stayed Cables of Main Bridge in Northern Bay of Xia-zhang Crossing Sea Bridge and Its Parameters

This paper simply introduces project profile of Xia-zhang Crossing Sea Bridge and expatiates researches on vibration and vibration control of stayed cables at home and abroad.In allusion of features of big flexibility of ultrolong stayed cables,low internal damp,wide distribution of inherent frequency and easy vibration under excitation of wind and rain and displacement of supporting end in northern bay of Xia-zhang Crossing Sea Bridge,the paper conducts analysis for vibration frequency of stayed cables,determination of installing height of damper,selection of viscosity of viscous bodies and calculation for size of damper boxes,etc.,and finally selects viscous shearing damper as external damper for stayed cables to ensure safety of stayed cables.