Seismic Ductility Design for Intercity Railway Continuous Bridge Under Rare Earthquake

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Journal of Railway Engineering Society ›› 2012, Vol. 29 ›› Issue (4) : 66-71.

ZHUO Yi，WANG Fei

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Abstract

Research purposes: The intercity railway bridge could enter into elastic － plastic stage under rare eathquake excitation，it has a significant e ngineering value and research meaning to do elastic － plastic seismic analysis and dutility design of intercity railway bridge． Taking a Dalian JinPu intercity railway continuous bridge as as the engineering background，based on the principle of fiber beam － column element model，the elasitc － plastic analysis model of ( 25 + 30 + 25) m prestressed concrete continuous box girdger bridge is modeled，the railway code response spectrum has been converted to artificial earthquake time － history curve using fourier transform method． Furtherly，the rare seismic analysis and ductility design is presented．

Research conclusions: The results show that only braking pier enter into plastic stage under rare earthquake excitation， the maximum value of ductily coefficient is 3． 02，smaller than railway code given value 4． 8，meet standard requirements． The seismic elastic － plastic analysis and ductility design method presented provide a practical method and design basis．

Key words

intercity railway / continuous bridge / plastic hinge / rare earthquake / ductility design / elastic － plastic analysis / fiber model．

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ZHUO Yi，WANG Fei. Seismic Ductility Design for Intercity Railway Continuous Bridge Under Rare Earthquake[J]. Journal of Railway Engineering Society, 2012, 29(4): 66-71

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