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（1 上海大學(xué)土木工程系，上海 200072； 2 上海寶鋼工程技術(shù)有限公司，上海 201900；3 同濟(jì)大學(xué)結(jié)構(gòu)工程與防災(zāi)研究所，上海 200092； 4 濟(jì)南市同圓建筑設(shè)計(jì)研究院，濟(jì)南 250001； 5 山東省建筑材料工業(yè)設(shè)計(jì)研究院，濟(jì)南 250022）

［摘要］通過模擬人行隨機(jī)荷載激勵(lì)，分別采用四種人行荷載工況對(duì)一座既有鋼結(jié)構(gòu)人行橋進(jìn)行了人致振動(dòng)時(shí)程分析，從而更好地了解該人行橋在行人激勵(lì)下的動(dòng)力特性。考慮到現(xiàn)有人行橋的動(dòng)力特點(diǎn)及對(duì)其振動(dòng)舒適度評(píng)價(jià)方法的不足，提出了考慮結(jié)構(gòu)雙向耦合振動(dòng)的舒適

度評(píng)價(jià)方法，并對(duì)該橋進(jìn)行了舒適度評(píng)價(jià)，證明了該橋在動(dòng)力性能上存在的問題。這對(duì)人行橋人行荷載模擬、人行橋振動(dòng)舒適度評(píng)價(jià)以及防振減振研究都具有參考借鑒意義。

［關(guān)鍵詞］人行橋；隨機(jī)人行荷載；荷載工況；人致振動(dòng)；舒適度評(píng)價(jià)

Analysis on pedestrian-induced vibration and comfort evaluation of an footbridge

Li Dong1, Fa Yongsheng2, Sun Cuihua3,4, Bao Liang 5

(1 Civil Engineering Department, Shanghai University, Shanghai 200072, China; 2 Shanghai Baosteel Engineering & Technology Co.,Ltd.,Shanghai 201900, China;3 Research Institute of Structural Engineering and Disaster Reduction, Tongji University, Shanghai 200092, China; 4 Jinan Tongyuan Research Institute of Architectural Design, Jinan 250001, China; 5 Shandong Province Design and Research Institute of Building Materials Industry, Jinan 250022, China)

Abstract:According to simulating stochastic pedestrian loads, and adopting fourload cases respectively, it analyzed the time-history responses of an existingsteel footbridge, which made the dynamic characteristics of the bridge understood better. By considering the dynamic characteristics of modern footbridges and the deficiencies of comfort evaluation method, it proposes a new evaluation method by considering coupling effect of bi-direction vibration. Using this method, a conclusion is drawn that some problems exist in dynamic performance of this footbridge certainly. This procedure, for simulating pedestrian loads, comfort evaluation and vibration reduction study, can be reference for similar engineering.

Keywords:footbridge; stochastic pedestrian load; load cases; pedestrian -induced vibration; comfort evaluation

作者簡介：李東，博士，副教授。