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（中國(guó)建筑標(biāo)準(zhǔn)設(shè)計(jì)研究院， 北京 100048）

［摘要］大跨度鋼桁架屋蓋的豎向自振頻率一般較低，在其下懸吊部分樓層，將導(dǎo)致較大的人行激勵(lì)反應(yīng)，不能滿足建筑舒適度的要求。從一個(gè)實(shí)際工程案例出發(fā)，研究了大跨度懸吊鋼結(jié)構(gòu)樓蓋舒適度的三個(gè)問題：舒適度標(biāo)準(zhǔn)、人致荷載的定義、TMD解決方案。選取了ISO 2631-2舒適度標(biāo)準(zhǔn)和工程上簡(jiǎn)化的人致荷載定義，考慮多種荷載工況下結(jié)構(gòu)采用TMD減振前后的加速度反應(yīng)。分析結(jié)果表明，TMD方案能夠使結(jié)構(gòu)在人致荷載下的振動(dòng)大幅度減小，并滿足舒適度要求。同時(shí)通過(guò)豎向地震時(shí)程分析，表明TMD系統(tǒng)對(duì)豎向地震具有減震作用。

［關(guān)鍵詞］大跨度鋼結(jié)構(gòu)屋蓋； 懸吊結(jié)構(gòu)； 人致荷載； 振動(dòng)控制； TMD

中圖分類號(hào)：TU351文獻(xiàn)標(biāo)識(shí)碼：A文章編號(hào)：1002-848X(2016)19-0051-06

Study on human comfort of suspended floor under large-span steel truss roof

Lu Lei， Lei Yuande， Yu Yinquan， Bu Fanjie， Wu Xiaofeng

(China Institute of Building Standard Design & Research,  Beijing 100048,  China)

Abstract:The large-span steel truss roof generally has a low vertical natural vibration frequency. The floor partly suspended under the roof leads to a large human-induced excitation,  which fails to meet the building comfort requirement. From a practical engineering case,  three problems of the comfort of large-span suspended steel structure floor were studied,  including the acceptance criteria for human comfort,  human-induced load definition and tuned mass damper（TMD）solutions. The ISO 2631-2 comfort standard and the definition of the simplified human-induced load in engineering were selected,  and the acceleration responses of the structure before and after usage of TMD for seismic reduction were considered under different load conditions. The analysis results show that the TMD scheme can greatly reduce the vibration of the structure under the human-induced load and satisfy the comfort degree requirement. Vertical seismic time-history analysis indicates that the TMD system has a damping effect on the vertical earthquake.

Keywords:large-span steel structure roof; suspended structure; human-induced excitation; vibration control; TMD

作者簡(jiǎn)介：盧雷，碩士，高級(jí)工程師，一級(jí)注冊(cè)結(jié)構(gòu)工程師，Email: leiyd07@163.com。