- 摘 要
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（1 中國航空規(guī)劃設(shè)計研究總院有限公司， 北京 100120；2 北京交通大學(xué)土木建筑工程學(xué)院， 北京 100044）
［摘要］以采用調(diào)諧質(zhì)量阻尼器（TMD）進行振動控制的某小學(xué)體育館大跨樓蓋為背景，分別在施工階段和正常使用階段對其進行了現(xiàn)場振動測試。施工階段主要考慮質(zhì)量增加對結(jié)構(gòu)振動特性的影響，正常使用階段重點考慮了人致振動的多種工況，并利用MIDAS/Gen有限元軟件對TMD的減振效率進行了分析。結(jié)果表明：大跨樓蓋的自振頻率隨著鋪設(shè)面層以及樓面重量的增加而減小，舒適度設(shè)計時應(yīng)按使用階段的實際最大荷載考慮；采用有限元軟件對樓蓋舒適度進行計算時，應(yīng)考慮面層對樓板剛度的影響；當(dāng)外部激勵的頻率與樓蓋的自振頻率接近時，TMD對樓蓋的減振效果最為顯著。
［關(guān)鍵詞］大跨樓蓋；振動測試；調(diào)諧質(zhì)量阻尼器；人致振動；減振
中圖分類號：TU398-9文獻標識碼：A文章編號：1002-848X(2021)03-0109-06
Dynamic properties and human-induced vibration analysis of long-span floors equipped with TMD
WANG Mingzhu1, HU Weizhong2, ZHANG Ling1, LIU Pei2, YANG Weiguo2, GE Jiaqi1
(1 China Aviation Planning and Design Institute Co., Ltd., Beijing 100120, China; 2 School of Civil Engineering, Beijing Jiaotong University, Beijing 100044, China)
Abstract:With the use of tuned mass dampers（TMD）for vibration control in the long-span floors of gymnasium of a primary school as the background, vibration tests were performed on the long-span floors at construction stage and normal use stage. The influence of mass increase on structural vibration characteristics was studied in construction stage. During the normal use stage, various working conditions of human-induced vibration were considered emphatically, and the vibration reduction efficiency of TMD was analyzed using MIDAS/Gen finite element software. Results show that the natural vibration frequency of the long-span floor decreases with the increase of the floor surface layers and floor weight. The comfort design of floors should use the actual maximum load at normal use stage. When finite element software is used to calculate the comfort of the floor, the influence of stiffness of floor surface layers should be considered. When the frequency of external excitation is close to the natural frequency of the floor, the vibration reduction effect of TMD on the floor is the most significant.
Keywords:long-span floor;vibration test;tuned mass damper;human-induced vibration;vibration reduction
作者簡介：王明珠，碩士，高級工程師，Email: 66539256@qq.com；通信作者：胡衛(wèi)中，博士研究生，Email：hwz_2016@163.com。
