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| 预应力度对节段拼装桥墩抗震性能影响研究 |
| Study on the effect of prestress on seismic performance of segmental bridge piers |
| 投稿时间：2018-09-11 修订日期：2018-10-22 |
| DOI： |
| 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 Aseismatic performance Pseudo-static testing Prestress Numerical study |
| 基金项目:国家十三五重点研发计划重点专项基金（2018YFC0809606）；辽宁省重点研发计划指导计划基金（2018416028）；沈阳市建委城乡系统科研项目（201804） |
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| 中文摘要: |
| 为研究预应力度对节段拼装桥墩抗震性能影响，采用ABAQUS有限元软件对不同预应力度的桥墩做仿真模拟分析，并通过拟静力试验加以验证模拟准确性。结合模拟与试验得到：（1）预应力连接的节段拼装桥墩滞回曲线均饱满，具有良好的耗能能力；（2）预应力度的提高对桥墩积累耗能能力提升显著；（3）节段间榫卯剪力键提供抗剪承载力，减少桥墩节段间应力，位移，避免了节段间的相对滑移；（4）通过ABAQUS有限元软件对桥墩做数值模拟与试验误差不超过15%。结果表明：随着预应力度的提高，节段拼装桥墩屈服位移和极限位移有一定的提高，积累耗能能力提高显著，但对桥墩延性及残余位移影响不大。 |
| 英文摘要: |
| Abstract:In order to study the influence of prestress degree on seismic behavior of segmental assembled piers, ABAQUS finite element software was used to simulate and analyze the pier under different prestressing degrees, and the accuracy of the simulation was verified by quasi-static test. The results of simulation and test show that: (1) the hysteretic curves of the segmental assembled piers are full and have good energy dissipation capacity; (2) the increase of prestressing force can significantly enhance the accumulation and energy dissipation capacity of the piers; (3) the tenon and tenon shear keys provide shear bearing capacity, reduce the stress and displacement between the piers, and avoid the relative slippage between the segments. (4) through the ABAQUS finite element software, The results show that：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 bridge pier. |
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