斜拉索阻尼器减振效果检测技术研究

斜拉索由于其质量轻、阻尼小,极易在外界激励下产生各种振动,在拉索锚固端附近安装阻尼器以提高拉索的模态阻尼是目前使用最广泛的减振方法,因此阻尼器减振效果的检测评定对于保证桥梁运营安全非常重要。基于DASP系列软件平台测试了拉索阻尼,利用人工激振拉索至一定振幅后再测得的振动衰减的位移时程曲线,计算了拉索前三阶模态阻尼,该方法简单可靠,可以用来进行拉索减振器的功能评定。

Research on Detection Evaluation Techniques for Effect of Stay Cable Damper

Stay cables are very sensitive to environmental excitations due to its light quality and low internal damping.Mechanical viscous dampers have already been installed to cables to mitigate cable vibration and the detection evaluation techniques for cable damper are very important to bridge safety.Based on DASP software system,the vibration control test of cable-damper system is carried out.The cable is excited by human power and then the free decay curve of cable and cable-damper system is measured.The results show that the method in this paper is reliable and can be used to evaluate the effect of cable damper.