Research on aseismic applicability of MTC device of railway continuous bridge with different pier heights

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Journal of Vibration and Shock ›› 2021, Vol. 40 ›› Issue (19) : 277-285.

CHEN Shitong1,2, XU Xinxiang2, ZHANG Maojiang2, LI Ran1,3

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Abstract

This paper aims to study the aseismic applicability of the multi-stage timely connection control (MTC) device of railway continuous bridge with different pier heights. Finite element models which contain 4 types of terrains of a (75+2×120+75)m continuous bridge with different pier heights were built using ANSYS. The influence of the variation of pier heights under 4 types of site on the seismic reduction, the internal force of the girder, and the force of the sliding piers were investigated and the optimization measures of the device were also suggested. Most continuous bridge with MTC devices under different terrains and site types have good aseismic effect. The axial force of the girder can be reduced when the MTC works. Though the bending state is changed, the structural safety of the girder is not affected. For those continuous bridges with higher piers whose aseismic effect is poor, measures that adjust the limit stiffness of the MTC can be taken to enhance the aseismic effect. Moreover, the seismic response of the sliding piers can be reduced by adjusting the proportion of the limit stiffness in zone I.

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railway continuous bridge / multi-stage timely control connection（MTC） device / seismic response / pier height / aseismic effect

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CHEN Shitong, XU Xinxiang, ZHANG Maojiang, LI Ran. Research on aseismic applicability of MTC device of railway continuous bridge with different pier heights[J]. Journal of Vibration and Shock, 2021, 40(19): 277-285

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