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（中國建筑設(shè)計(jì)研究院有限公司， 北京 100044）
［摘要］中關(guān)村三小新校區(qū)體育館平面呈橢圓形，屋蓋結(jié)構(gòu)的最大跨度39-5m。體育館屋蓋結(jié)構(gòu)具有自身阻尼小、跨度大以及剛度小等特點(diǎn)?；诮ㄖδ艿男枰?，體育館的屋蓋兼做學(xué)校的操場使用。大跨度結(jié)構(gòu)在人群荷載激勵下容易產(chǎn)生較大的動力響應(yīng)，使得屋蓋結(jié)構(gòu)的豎向振動加速度超過人體的耐受極限，給人造成不適甚至引起恐慌。采用SAP2000軟件建立體育館屋蓋的整體模型，并對其進(jìn)行模態(tài)分析，系統(tǒng)研究屋蓋的豎向振動特點(diǎn)，根據(jù)結(jié)構(gòu)自振特性，為減小振動不適感，在屋蓋結(jié)構(gòu)上布置了54個調(diào)諧質(zhì)量阻尼器，參照中國規(guī)范和英國標(biāo)準(zhǔn)設(shè)定屋蓋結(jié)構(gòu)振動加速度限值。選取不同運(yùn)動的荷載激勵時程，通過多點(diǎn)輸入計(jì)算屋蓋結(jié)構(gòu)的豎向加速度響應(yīng)。理論分析和實(shí)測結(jié)果表明，該減振方案可以有效地減小振動，使屋蓋滿足舒適度要求。
［關(guān)鍵詞］大跨屋蓋； 振動控制； 調(diào)諧質(zhì)量阻尼器； 舒適度
中圖分類號：TU392-3文獻(xiàn)標(biāo)識碼：A文章編號：1002-848X(2019)07-0097-06
Research on human-induced vibration control on gymnasium roof of NO.3 Zhongguancun Primary School
Luo Minjie, Yin Yang, Ren Qingying, Zhang Shixiong, Yu Lei
(China Architecture Design & Research Group, Beijing 100044, China)
Abstract:The gymnasium roof of NO.3 Zhongguancun Primary School has an elliptical plane, and the maximum span of the roof structure is 39-5m. The structure of the gymnasium roof has the characteristics of small damping, large span and low rigidity. Based on the needs of the building function, the roof of the gymnasium is also used as a playground for the school. The large-span structure is prone to generate a large dynamic response under the excitation of the crowd, so that the vertical vibration acceleration of the roof structure exceeds the tolerance limit of the human body, causing discomfort and even panic. The overall model of the gymnasium roof was built by SAP2000 software, and the modal analysis was carried out. The vertical vibration characteristics of the roof were systematically studied. According to the self-vibration characteristics of the structure, in order to reduce the vibration discomfort, 54 tuned mass dampers (TMDs) were arranged on the roof structure. The vibration acceleration limit of the roof structure was set with reference to Chinese and British codes. The load excitation time history of different motions was selected, and the vertical acceleration response of the roof structure was calculated by multi-point input. Theoretical analysis and measured results show that the vibration reduction scheme can effectively reduce the vibration and make the roof meet the comfortableness requirements.
Keywords:large-span roof; vibration control; tuned mass damper; comfortableness
作者簡介：羅敏杰，碩士，高級工程師，Email：shanike@163.com。
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