Simplified aseismic calculation model for railway gravity bridge pier

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Journal of Vibration and Shock ›› 2021, Vol. 40 ›› Issue (9) : 71-76.

LU Jinhua, CHEN Xingchong, DING Mingbo, MA Huajun, ZHANG Xiyin

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Abstract

Here, aiming at situations of only one main crack being formed at the bottom of a railway gravity bridge pier with low reinforcement, concrete at the bottom of the pier being not obviously crushed without plastic hinge area formed, and existing obvious rocking phenomenon under dynamic action, a simplified aseismic calculation model for this kind of bridge pier was proposed.It was shown that this model is a 4-spring one of the 2-spring model of a free swing bridge pier added 2 springs for a longitudinal steel bar only under tension.According to the model pier test results, stiffness values of springs only under tension were determined.The calculation results of the 4-spring model under static and dynamic actions were compared with the test ones.It was verified that the 4-spring aseismic analysis model can be used for simplified aseismic calculation of railway gravity bridge pier.

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low reinforcement / railway gravity bridge pier / aseismic analysis / simplified model

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LU Jinhua, CHEN Xingchong, DING Mingbo, MA Huajun, ZHANG Xiyin. Simplified aseismic calculation model for railway gravity bridge pier[J]. Journal of Vibration and Shock, 2021, 40(9): 71-76

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