Damage analysis and assessment of precast segmental columns subjected to vehicle collision

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Journal of Vibration and Shock ›› 2022, Vol. 41 ›› Issue (24) : 150-158.

ZHANG Yuye1,LI Qinghua1,FAN Wei2,YUAN Wancheng3

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Abstract

In order to reasonably evaluate the damage states of precast segmental bridge columns (PSBCs) under vehicle impact, a collision damage evaluation method suitable for PSBCs was investigated. A three-dimensional finite element model of the vehicle impacting PSBCs was established and the damage analysis of the columns was carried out. The accuracy of the pier and the vehicle model was verified by comparison with the test results. The displacement response and damage characteristics of PSBCs with different parameters were analyzed, and the change law of residual displacement and cross-section damage was studied. The damage evaluation index of PSBCs considering residual displacement and section damage is proposed, and the damage states of the columns was divided and each damage state limit was determined. The research results show that the displacement response of the PSBCs in the test range is most sensitive to the initial impact energy and axial compression ratio of the vehicle; the damage of the PSBCs under the collision of the vehicle is concentrated on the directly impacted segment; the greater the residual displacement and section damage rate of the column in a vehicle collision, the more serious the damage after the collision; the bridge column damage assessment method that considers the residual displacement and section damage can accurately evaluate the damage state of the PSBCs under vehicle impact.

Key words

precast segmental bridge columns / vehicle impact / damage assessment / residual displacement / section damage

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ZHANG Yuye1,LI Qinghua1,FAN Wei2,YUAN Wancheng3. Damage analysis and assessment of precast segmental columns subjected to vehicle collision[J]. Journal of Vibration and Shock, 2022, 41(24): 150-158

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