- 摘 要
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（奧雅納工程顧問， 上海 200031）
［摘要］結(jié)合德國規(guī)范EN 03和國內(nèi)有關(guān)舒適度分析的規(guī)范參數(shù)取值，對人行天橋在人行荷載作用下的振動舒適度分析過程進(jìn)行詳細(xì)解讀，并通過一個(gè)項(xiàng)目案例在多種工況和多種阻尼比下的對比分析，得出以下結(jié)論：提高阻尼比可有效降低振動加速度；改變橋梁頻率來減小振動加速度時(shí)需避開折減系數(shù)ψ的峰值區(qū)域；對舒適度要求比較高的橋梁建議預(yù)留TMD設(shè)置條件；建議結(jié)合橋梁人流分析結(jié)果確定不同的舒適度分析工況，并根據(jù)不同人流工況在橋梁使用期間發(fā)生的概率確定各自的舒適度級別。
［關(guān)鍵詞］鋼結(jié)構(gòu)； 人行天橋； 自振頻率； 舒適度
中圖分類號：TU997文獻(xiàn)標(biāo)識碼：A文章編號：1002-848X(2018)18-0048-05
Vibration comfort analysis on large-span pedestrian bridge
Lai Shaoping, Ho Desmond
(ARUP, Shanghai 200031, China)
Abstract:Considering the standard parameter values of the German standard EN 03 and the domestic comfortable degree analysis, the vibration comfort analysis process of the pedestrian bridge under the action of human load was explained in detail, and the comparison and analysis of a project case were conducted under a variety of working conditions and multiple damping ratios. The following conclusions were drawn that: the increase of damping ratio can effectively reduce vibration acceleration; when the bridge frequency is changed to reduce vibration acceleration, the peak area of the reduction factor ψ should be avoided; for the bridge with higher comfort requirement, TMD setting conditions should be reserved; it is suggested that different comfort analysis conditions should be determined according to the results of bridge pedestrian flow analysis, and the comfortable degree is determined according to the probability of different pedestrian flow conditions during the use of bridges.
Keywords:steel structure; pedestrian bridge; natural frequency; comfortable degree
作者簡介：來少平，碩士，一級注冊結(jié)構(gòu)工程師，Email：shao-ping.lai@arup.com。
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