大跨度鋼結構樓蓋豎向振動舒適度的研究
朱鳴1，張志強2，柯長華1，張徐1，李愛群2
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(1 北京市建筑設計研究院，100045； 2 東南大學土木工程學院，南京210096)［提要］以某工程60m跨度鋼結構樓蓋為背景，對大跨度鋼結構樓蓋舒適度的校核與改善做了研究。在樓蓋中采用了多點TMD 粘滯流體阻尼器消能減振系統(tǒng)，對樓蓋減振前后在各種不利工況作用下的動力響應采用SAP2000進行了計算分析。為了驗證減振效果，對樓蓋的實際動力特性及樓蓋在安裝阻尼器前后的響應作了現場測試，試驗結果與理論計算基本一致。實踐表明，多點TMD 粘滯流體阻尼器消能減振系統(tǒng)對于大跨度樓蓋豎向振動舒適度的改善具有一定效果，可以在類似大跨樓蓋結構中推廣。［關鍵詞］大跨度；舒適度；減振；TMD(調頻質量阻尼器)Study on Improving People"s Comfortableness on Larg-Span Steel Floor Structures/Zhu Ming1, Zhang Zhiqiang2, Ke Changhua1, Zhang Xu1, Li Aiqun2(1 Beijing Institute of Architectural Design, Beijing 100045,China; 2 College of Civil Engineering, Southeast University, Nanjing 210096, China)Abstract: Based on a project with a 60m-span floor structure, it does some trying work on checking and improving peoples comfortableness on large-span steel floor structures. A vibration decreasing system of multipoint TMD-fluid viscous dampers is used in this floor structure. The dynamic response of floor structure caused by some disadvantageous cases before and after the vibration decreasing system is analyzed using SAP2000 software. To verify the actual effect of vibration decreasing, the onsite test is carried out, which tests the actual dynamic properties and structural response before and after dampers are installed. The testing result is basically consistent with the theoretic analysis. The structural practice indicates that the vibration decreasing system of multipoint TMD-fluid viscous dampers has some effect on minimizing the floor vibration of large-span structures and can be applied to similar large-span structures.Keywords: large span; comfortableness; vibration decreasing; TMD(tuned mass damper)
