采用环形TLCD的自立式钢管结构减振试验研究

发布时间：2019-03-26 15:18

【摘要】：近年来自立式钢管结构在动力作用荷载下的损伤和倒塌时有发生,调谐液柱阻尼器(Tuned Liquid Column Damper,TLCD)作为一种调频减振器,特别适用于高耸结构的振动控制。围绕环形TLCD在自立式钢管结构中的应用,介绍了环形TLCD的构造,并推导其力学模型,进而建立了自立式钢管结构环形TLCD减振的动力方程。根据自立式钢管结构试验模型设计了试验用的环形TLCD,并确定了加载与测试方案。针对自立式钢管结构,提出了基于模拟退火算法的模型修正方法,并以底部转动刚度和刚度修正系数为变量,以前3阶实测频率为目标,进行了算例研究,修正后的数值模型频率最大误差仅为1.74%。开展了环形TLCD减振试验,并结合修正后的数值模型对试验结果进行了比较分析。研究表明,试验中采用的环形TLCD能够使自立式钢管结构等效阻尼比由0.013 4增加到0.026 7,从而有效减小了结构动力响应,且所编制的程序能够一定程度预测该类减振结构体系的动力响应。相应的数值分析方法与模型试验能够为自立式钢管结构环形TLCD的设计与应用提供参考。
[Abstract]:In recent years, damage and collapse of self-standing steel pipe structures under dynamic loads occur frequently. Tuned liquid column damper (Tuned Liquid Column Damper,TLCD), as a kind of frequency-modulated vibration absorber, is especially suitable for vibration control of high-rise structures. Based on the application of ring TLCD in self-standing steel pipe structure, this paper introduces the structure of ring TLCD, deduces its mechanical model, and establishes the dynamic equation of circular TLCD vibration reduction for self-standing steel pipe structure. According to the test model of the self-standing steel pipe structure, the annular TLCD, for the test is designed and the loading and testing scheme is determined. Aiming at the self-standing steel pipe structure, a model correction method based on simulated annealing algorithm is put forward. Taking the rotational stiffness at the bottom and the stiffness correction coefficient as variables and the former three-order measured frequency as the target, a numerical example is studied. The maximum frequency error of the modified numerical model is only 1.74%. The circular TLCD vibration reduction test is carried out and the experimental results are compared and analyzed with the modified numerical model. The results show that the equivalent damping ratio of the self-standing steel pipe structure can be increased from 0.013 4 to 0.026 7 by the annular TLCD used in the experiment, thus the dynamic response of the structure can be reduced effectively. The program can predict the dynamic response of this kind of structural system to a certain extent. The corresponding numerical analysis method and model test can provide reference for the design and application of ring TLCD for self-standing steel pipe structure.
【作者单位】：苏州科技大学江苏省结构工程重点实验室;北京建筑大学土木与交通学院;东南大学混凝土及预应力混凝土结构教育部重点实验室;苏州云白环境设备制造有限公司;
【基金】：国家自然科学基金(51408389;51438002) 江苏省自然科学基金青年基金项目(BK20140281)
【分类号】：TU392.3

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