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模块化建筑阵列多调谐质量阻尼系统的实现与减震研究
Implementation and vibration control of an array multi-tuned mass damping system for modular buildings
【摘要】 基于建筑模块化和悬挂楼板减震的原理提出了悬挂楼板模块体系(modularized suspended floors system, MSFS)。利用楼板作为质量块,组成分布阵列式多调谐质量阻尼器(distributed array multiple tuned mass dampers, d-array-MTMDs)系统。通过输入32条远场和近场地震动记录进行时程分析,对平均调谐频率比η、调谐频带宽度系数β、调谐阻尼比ζ_T、TMD数量n以及主结构层数N,共5个参数展开研究。结果表明:d-array-MTMDs的减震效果优于普通MTMDs系统;ζ_T对系统减震性能影响较小,当η为0.7~1.0、β为2.0时,系统具有更好的减震效果;当n大于某阈值时,系统的减震效果趋于稳定,阈值与η线性正相关,与ζ_T非线性负相关。随着模块建筑层数的增加,系统也能维持较好的减震效果。
【Abstract】 A modularized suspended floors system(MSFS) was proposed based on the principle of building modularity and vibration controlling by using suspended floors. A distributed array multiple tuned mass dampers(d-array-MTMDs) system was constructed using floor stabs as the masses of TMDs. Thirty-two ground motion records were impat for time-history analysis and the optimal values of the five parameters were given, including the average tuning frequency ratio η, the tuning bandwidth coefficient β, the tuning damping ratio ζ_T, the number of TMDs n, and the number of layers N of the main structure. The results show that the damping effect of the d-array-MTMDs system is better than that of the ordinary MTMDs system. ζ_T has little influence on the vibration control performance of the system. When η is 0.7-1.0 and β is 2.0, the system has the best vibration control effect. When n is greater than a certain threshold, the vibration control effect and stability of the system are improved significantly. The threshold is positively correlated with η and negatively correlated with ζ_T. With the increase of the storey number of a module building, the system can still maintain an improved vibration control effect.
【Key words】 modular building; multi-tuned mass damper; suspension structure; vibration control;
- 【文献出处】 振动与冲击 ,Journal of Vibration and Shock , 编辑部邮箱 ,2024年06期
- 【分类号】TU352.1
- 【下载频次】74