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（1 浙江精工鋼結(jié)構(gòu)集團(tuán)有限公司， 紹興 312030; 2 上海路博減振科技股份有限公司， 上海 201401）

［摘要］采用時(shí)程分析的模擬計(jì)算方法，以豎向振動(dòng)加速度峰值作為評(píng)價(jià)標(biāo)準(zhǔn)，對(duì)那曲地區(qū)藏北高原商業(yè)生態(tài)長廊建設(shè)項(xiàng)目鋼連廊豎向振動(dòng)加速度進(jìn)行分析與控制。根據(jù)人群密度，考慮五種不同時(shí)程工況，對(duì)布置TMD前后的鋼連廊分別進(jìn)行時(shí)程分析，較為全面地揭示了鋼連廊的豎向振動(dòng)。分析結(jié)果表明，在1.95Hz的人群荷載激勵(lì)下，鋼連廊產(chǎn)生了非常明顯的共振，跨中峰值加速度達(dá)到39.96cm/s2，會(huì)引起行人心里不適，豎向振動(dòng)加速度也超出了規(guī)范限值，需要進(jìn)行減振控制；布置TMD后，在人群荷載激勵(lì)下，鋼連廊的豎向振動(dòng)加速度得到了很好的控制，峰值小于15cm/s2，減振率可達(dá)到13%～65%。

［關(guān)鍵詞］鋼連廊； 豎向振動(dòng)加速度； 時(shí)程分析； TMD

中圖分類號(hào)：TU318文獻(xiàn)標(biāo)識(shí)碼：A文章編號(hào)：1002-848X(2021)02-0046-04

Research on time history analysis and control of vertical vibration acceleration of steel corridor

WU Guosong1, ZHANG Quanwu2

（1 Zhejiang Seiko Steel Structure Group Co., Ltd.， Shaoxing 312030， China; 2 Shanghai RB Vibration Science and Technologies Co., Ltd.， Shanghai 201401， China)

Abstract:The simulation calculation method of time-history analysis was adopted, and the vertical vibration acceleration peak value was used as the evaluation standard to analyze and control the vertical vibration acceleration of the steel corridor of the commercial ecological corridor construction project on the Northern Tibetan Plateau in Nagqu area. According to the crowd density, five different time-history conditions were considered, and the time-history analysis of the steel corridors before and after the TMD arrangement was carried out, which reveals the vertical vibration of the steel corridors more comprehensively. The analysis results show that under the excitation of the crowd load of 1.95Hz, the steel corridor has a very obvious resonance,  the peak  acceleration of mid-span reaches 39.96cm/s2, which will cause discomfort to the pedestrians.  The vertical vibration acceleration also exceeds the specification limit, and vibration reduction control is required. After the TMD is arranged, the vertical vibration acceleration of the steel corridor is well controlled under the excitation of the crowd load, the peak value is less than 15cm/s2, and the vibration reduction rate can reach 13%~65%.

Keywords:steel corridor; vertical vibration acceleration; time history analysis; TMD

作者簡介：吳國松，學(xué)士，工程師，Email: 806541620@qq.com。