预应力度对节段拼装桥墩抗震性能影响研究

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包龙生,宋吉宏,于玲.预应力度对节段拼装桥墩抗震性能影响研究[J].,2019,59(3):302-309

预应力度对节段拼装桥墩抗震性能影响研究

Research on effect of prestress degree on seismic performance of segmental assembly piers

DOI：10.7511/dllgxb201903012

中文关键词:节段拼装桥墩抗震性能拟静力试验预应力度数值分析

英文关键词:segmental assembly pier seismic performance quasi-static test prestress degree numerical analysis

基金项目:“十三五”国家重点研发计划项目(2018YFC0809606)；辽宁省重点研发计划指导计划项目(2018416028)；沈阳市城乡建设委员会城乡建设系统科研项目(201804).

作者	单位
包龙生,宋吉宏,于玲

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中文摘要:

为了研究预应力度对节段拼装桥墩抗震性能的影响，采用ABAQUS有限元软件对不同预应力度的桥墩进行仿真模拟分析，并通过拟静力试验验证模拟准确性．由模拟与试验结果得到：预应力连接的节段拼装桥墩滞回曲线呈旗帜型；节段间榫卯剪力键提供抗剪承载力，减小了桥墩节段间应力及位移，避免了节段间的相对滑移；ABAQUS有限元软件对桥墩的数值模拟与试验相比误差不超过15%；随着预应力度的增大，节段拼装桥墩屈服位移和极限位移有一定的增加，累积耗能能力显著增强，但对桥墩延性及残余位移影响不大．

英文摘要:

In order to study the effect of prestress degree on seismic performance of segmental assembly piers, ABAQUS finite element software is used to simulate and analyze the pier under different prestress degrees, and the accuracy of the simulation is verified by quasi-static test. The results of simulation and test show that: The hysteretic curve of the prestressed segmental assembly pier is flag type; The tenon and tenon shear keys provide shear bearing capacity, reduce the stress and displacement between the pier segments, and avoid the relative slippage between the segments; Compared to the test, the error of numerical simulation of the piers by ABAQUS finite element software is not more than 15%; With the increase of prestress degree, the yield displacement and limit displacement of segmental assembly pier are improved to a certain extent, and the accumulative energy dissipation capacity is improved significantly, but it has little effect on the ductility and residual displacement of the piers.

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