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（中船第九設(shè)計(jì)研究院工程有限公司， 上海 200063）

［摘要］結(jié)合國(guó)內(nèi)外規(guī)范及相關(guān)研究成果，采用動(dòng)力彈性時(shí)程分析方法對(duì)某大跨懸挑結(jié)構(gòu)實(shí)際工程項(xiàng)目進(jìn)行了人行舒適度分析與振動(dòng)控制設(shè)計(jì)。結(jié)果表明：對(duì)于大跨懸挑結(jié)構(gòu)，在結(jié)構(gòu)強(qiáng)度與變形滿足要求的情況下，樓蓋舒適度也可能不滿足要求；當(dāng)其自振頻率降低到與人群荷載頻率接近時(shí)，舒適度問(wèn)題較為明顯；通過(guò)調(diào)諧質(zhì)量阻尼器等減振措施可以有效地降低樓蓋在人群荷載激勵(lì)下的豎向振動(dòng)，從而使樓蓋滿足舒適度使用要求。

［關(guān)鍵詞］大跨結(jié)構(gòu)； 大懸挑； 人行舒適度； 調(diào)諧質(zhì)量阻尼器； 減振設(shè)計(jì)

中圖分類號(hào)：TU312文獻(xiàn)標(biāo)識(shí)碼：A文章編號(hào)：1002-848X(2018)17-0034-04

Pedestrian comfort analysis and vibration control for a long-span overhanging structure

Li Qingwu, Hu Kai, Ni Jiangong, Sun Bo, Cai Mao

(China Shipbuilding NRDI Engineering Co.,  Ltd.,  Shanghai 200063， China)

Abstract:Based on the domestic and foreign regulations  and research findings, the pedestrian comfort analysis and vibration control design of a practical long-span overhanging structure have been done by using the elastic time history analysis method. The result verifies that even if the bearing capacity and deformation capacity meet the design requirement for long-span overhanging, the pedestrian comfort problem is probably insatiable. When the natural frequency is close to the frequency of the crowd load, the comfort problem is more serious. Using tuned mass damper for vibration control design can reduce the effect of vertical vibration excited by the crowd effectively, so that the pedestrian comfort can meet the design requirements.

Keywords:long-span structure; overhanging structure; pedestrian comfort; tuned mass damper; vibration control

作者簡(jiǎn)介：李慶武，碩士，助理工程師，Email:Leeqingwu@gmail.com。