- 摘 要
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（上海大學土木工程系 200072）
［提要］ 針對一出現(xiàn)較大振動的人行天橋，利用有限元分析軟件建立了計算模型并進行了動力特性分析，同時對結構進行了動力測試。實測數(shù)據(jù)與修正后的有限元模型分析結果吻合較好，利用分析結果對該天橋的振動水平做出判斷，結果也比較吻合。在此基礎上找到了引起結構振動的主要振動源，為結構后繼的加固改造提供關
鍵信息。這一方法效果較好，可為今后類似工程提供參考。
［關鍵詞］ 人行天橋 振動 動力測試 有限元分析 振動源
Dynamic Test and Finite Element Analysis on an Existing Footbridge/Fa Yongsheng,Li Dong(Civil Engineering Department, Shanghai University, Shanghai 200072, China)
Abstract:Finite element model is made with finite element analysis software and the dynam
ic characteristics of an existing footbridge are analyzed.A dynamic test is made. The test datum accords with the analysis results.The main vibration sources causing the vibration of the structure, which will provides key information for the strengthening,are found. This procedure can be a reference in similar engineering.
Keywords:footbridge; vibration; dynamic test; finite element analysis; vibration source
