摇摆一自复位中柱在地下车站中的抗震性能研究

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中图分类号：TU317 文献标志码：A 文章编号：1003-5168（2025）23-0066-10

DOI：10.19968/j.cnki.hnkj.1003-5168.2025.23.011

A Study on the Seismic Performance of Rocking Self-Centering Central Columns in Underground Stations

YAN Haiquan1DONG Zhengfang² WANG Gaofeng² （1.Shanghai Municipal Engineering Designand Research Institute （Group） Co.，Ltd.，Shanghai 2Ooo82，China; 2.School of Civil and Architectural Engineering，Henan University， Kaifeng 475oO4， China）

Abstract： [Purposes] The central column is the weakest component in underground stations under seismic action， and its insufficient seismic capacity is a primary cause of structural damage or even collapse. To mitigate seismic hazards，this study proposes implementing a rocking self-centering structural form for the central columns.[Methods] Numerical analysis was performed using an established soil-structure interaction model.Sensitivity analyses were first conducted on influencing factors such as the axial compression ratio of the central column and the configuration of unbonded prestressed tendons.Subsequently，the seismic performance of the rocking self-centering central column within the underground station was investigated.[Findings] The results show that，compared to the conventional fixed-base form，the shear forces and bending moments at both ends of the rocking self-centering central column decreased by 30% to 40% under seismic action. However， due to the presence of unbonded prestressed tendons，the axial force sustained by the segmented central column increased by 5% to 10% . Afterimplementing the rocking self-centering central column，the increases in shear force and bending moment in the sidewalls were limited to less than 10% .Moreover， different configurations of energy dissipation components in the central column had a negligible influence on the internal forces of the sidewalls.[Conclusions]The rocking self-centering central column can effectively enhance the seismic resistance of station center columns and demonstrates good applicability in underground station structures.

Keywords： underground engineering; underground station; rocking self-centering; station central column;seismic resistance

0引言

近年来，我国城市轨道交通发展迅速，地下车站数量不断增加。（剩余7793字）