Study on earthquake characteristics of high-speed railway simply-supported girder bridge

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Journal of Vibration and Shock ›› 2011, Vol. 30 ›› Issue (12) : 216-222.

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Study on earthquake characteristics of high-speed railway simply-supported girder bridge

Chen Lingkun1，2; Jiang Lizhong1，2; Yu Zhiwu1，2; Luo Bofu1，2

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Abstract

In recent years, along with fast development of high-speed railway, research on dynamic response of high-speed railway bridge under earthquake has raised great concern among common people and researchers. The finite element method is employed to establish the beam element space analysis model of the high speed railway bridge and solid model of single pier in this paper, by means of finite element software and bending moment-curvature relationship program, the elastic-plastic earthquake responses of high-speed railway bridge under different earthquake intensity and effect combination is calculated under different earthquake strength, different speeds and soil-structure interaction (SSI). The calculation results show that influence of the SSI on seismic responses is little under good geology condition, the simplified method can be adopt to consider the SSI; the seismic responses increase with the increase of earthquake strength, train speed and pier height; the frequency character of seismic wave have great effects on the seismic responses of structure; the piers bottom step into elastic-plastic stage and plastic hinge will be developed at the bottom of piers under the rare earthquake action, the stirrup densification should be taken into account to enforce the elastic-plastic deformation capacity of piers.

Key words

earthquake characteristics / high-speed railway / simply-supported girder bridge / elastic-plastic analysis

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Chen Lingkun; Jiang Lizhong; Yu Zhiwu; Luo Bofu;. Study on earthquake characteristics of high-speed railway simply-supported girder bridge[J]. Journal of Vibration and Shock, 2011, 30(12): 216-222