工程力学 ›› 2019, Vol. 36 ›› Issue (S1): 248-254.doi: 10.6052/j.issn.1000-4750.2018.04.S048

• 土木工程学科 • 上一篇    下一篇

预应力混凝土管桩与承台连接节点抗震性能研究

杨志坚1, 韩嘉明1, 雷岳强1, 赵海龙2, 胡嘉飞1   

  1. 1. 沈阳建筑大学土木工程学院, 沈阳 110168;
    2. 天津大学建筑工程学院, 天津 300072
  • 收稿日期:2018-04-27 修回日期:2019-04-08 出版日期:2019-06-18 发布日期:2019-06-18
  • 通讯作者: 杨志坚(1984-),男,江西人,副教授,博士,主要从事预应力高强混凝土管桩抗震研究(E-mail:faemail@163.com). E-mail:faemail@163.com
  • 作者简介:韩嘉明(1993-),女,沈阳人,硕士生,主要从事预应力高强混凝土管桩抗震研究(E-mail:951936076@qq.com);雷岳强(1994-),男,山西人,硕士生,主要从事预应力高强混凝土管桩抗震研究(E-mail:1317003943@qq.com);赵海龙(1981-),男,黑龙江人,副教授,博士,主要从事钢筋混凝土结构抗震研究(E-mail:zhaohailong@tju.edu.cn);胡嘉飞(1996-),男,浙江人,主要从事预应力高强混凝土管桩抗震性能研究(E-mail:343447532@qq.com).
  • 基金资助:
    辽宁省高等学校创新人才支持计划项目(LR2017077);沈阳市中青年科技创新人才项目(RC180270);中国博士后科学基金项目(2016M601340)

RESEARCH ON SEISMIC PERFORMANCE OF PRESTRESSED HIGH STRENGTH CONCRETE PILE-CAP CONNECTIONS

YANG Zhi-jian1, HAN Jia-ming1, LEI Yue-qiang1, ZHAO Hai-long2, HU Jia-fei1   

  1. 1. School of Civil Engineering, Shenyang Jianzhu University, Shenyang 110168 China;
    2. School of Civil Engineering, Tianjin University, Tianjin 300072
  • Received:2018-04-27 Revised:2019-04-08 Online:2019-06-18 Published:2019-06-18

摘要: 基于预应力混凝土管桩与承台连接节点的低周往复荷载试验,并采用OpenSees对预应力混凝土管桩与承台连接节点进行了往复荷载作用下的受力性能分析。有限元建模时,考虑了端部锚固钢筋的滑移,计算得到的荷载-位移滞回曲线、弯矩-转角滞回曲线等与试验结果吻合较好。研究结果表明,PHC管桩与承台连接节点由于桩端预应力筋被拉断或桩与承台交接处锚固钢筋发生屈服而发生受弯破坏;锚固钢筋的弯折方式和填芯对节点桩端的承载力和滞回性能影响不大;桩端和承台之间的转动对节点受力性能影响较大。

关键词: 预应力混凝土管桩, 节点, 有限元分析, 往复荷载, 抗震性能

Abstract: Based on the experiments of prestressed high strength concrete pile-cap connections under cyclic loading, nonlinear finite element models were used to analyze the mechanical properties of these connections by OpenSees. The model is based on incorporating at the pile-deck interfacing a rotational spring fiber-based element connection to frame elements where the nonlinearity of structural property is distributed along the pile length. The interaction between the softening of concrete and the slipping of the reinforcement at the end of a pile was considered in the model. The comparison between analytical and experimental results shows that the model is capable of accurately describing the cyclic behavior in pile-cap connections. The test resulted showed that connections damaged because the rupture of prestressed bars or the yield of anchor bars. The bending angle of anchor bars and hollow filled have no obviously effect on the bearing capacity and hysteretic behavior. The rotation between pile and cap influenced the behavior of the connection.

Key words: prestressed high strength concrete pile, pile-cap connection, finite element analysis, cyclic loading, seismic performance

中图分类号: 

  • TU753.2
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