An equivalent additional damping approach to assess vehicle-bridge interaction for train-induced vibration of short-span railway bridges

doi:10.1016/j.engstruct.2019.01.144

淡江大學機構典藏 > 工學院 > 建築學系暨研究所 > 期刊論文 > Item 987654321/116216

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題名:	An equivalent additional damping approach to assess vehicle-bridge interaction for train-induced vibration of short-span railway bridges
作者:	J.D. Yau;M.D. Martínez-Rodrigob;A. Doménechc
關鍵詞:	Additional damping method;Eurocode;High-speed railway bridges;Moving loadsResonance;Vehicle-bridge interaction
日期:	2019-06
上傳時間:	2019-04-11 12:10:21 (UTC+8)
摘要:	Constant moving load models are widely adopted in the dynamic analysis of railway bridges under moving trains. However, the use of this simple model may overestimate the resonant response of simply supported bridges if the vehicle-bridge interaction (VBI) effects are neglected, particularly for short spans. To account for the VBI effects, Eurocode 1 allows engineers to consider an additional amount of structural damping which depends on the bridge span. This method is the so-called Additional Damping Method (ADM), and was formulated in order to provide a conservative prediction of the interaction benefit. Nevertheless, the Additional damping method may sometimes yield to an unsafe prediction of the bridge peak response. Considering the interaction benefits, an alternative analytical approach based on an equivalent VBI model under resonant excitations is presented in this investigation. The key parameters dominating the additional damping problem are subsequently identified. According to the numerical demonstrations supplied, the presented approach provides insights that enable an accurate prediction of the additional amount of damping needed in order to account for VBI effects on short simply-supported railway bridges.
關聯:	Engineering Structures 188, p.469-479
DOI:	10.1016/j.engstruct.2019.01.144
顯示於類別:	[建築學系暨研究所] 期刊論文

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