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首页> 外文期刊>Structural engineering international >Seismic Performance of Pile-Cap Connections of Prestressed High-Strength Concrete Pile with Different Details
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Seismic Performance of Pile-Cap Connections of Prestressed High-Strength Concrete Pile with Different Details

机译：不同细节预应力高强混凝土桩桩帽连接的抗震性能

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摘要

This study investigated analytically and experimentally the pile-cap connection of a full-scale prestressed high-strength concrete pile considering three different connection details: the common connection (specimen CT-1), a strengthened connection (specimen CT-2) and an internal T-shape steel connection (specimen CT-3). Specifically, the failure modes, hysteretic performance, ductility and bearing capacity were studied. The test results show that the three connections experience different failure patterns. Specimen CT-1 was severely damaged primarily at the pile-cap connection due to the rupture of anchor plates and the formation of a plastic hinge, but no damage to the pile was observed. This connection consists of a relatively large node angle and behaves like a hinge, resulting in poor energy dissipation due to small moment resistance. Specimens CT-2 and CT-3 were damaged at lesser degree and in more sparse areas. These two types of connections have smaller node angles and behave as a rigid joint with greater moment resistance, leading to a higher energy dissipation. Bond slippage failure of anchor bars was not observed in the cap, and the anchor bar length was found to meet the design requirements. A non-linear finite element model (FEM) was established to analyse the mechanical properties of the three connections using ABAQUS. The moment-displacement curves obtained from the numerical analyses compare well with the experimental results. The degree of effects of influencing parameters on the behaviour of the connections was evaluated using the FEM.
机译：这项研究分析和实验研究了全尺寸预应力高强度混凝土桩的桩帽连接，其中考虑了三种不同的连接细节：普通连接（CT-1型），加强连接（CT-2型）和内部连接。 T型钢连接件（CT-3型）。具体来说，研究了破坏模式，滞后性能，延性和承载能力。测试结果表明，这三个连接经历了不同的故障模式。样品CT-1主要由于锚定板的破裂和塑料铰链的形成而在桩帽连接处受到严重损坏，但未观察到桩的损坏。该连接由相对较大的节点角组成，并且表现得像铰链一样，由于力矩阻力小，导致能量消耗不佳。标本CT-2和CT-3受到的损坏程度较小，且在稀疏区域内。这两种类型的连接具有较小的节点角，并且表现为具有较大抗弯矩的刚性接头，从而导致较高的能量耗散。在盖中未观察到锚杆的粘结滑移破坏，发现锚杆的长度符合设计要求。建立了非线性有限元模型（FEM），以使用ABAQUS分析三个连接的机械性能。从数值分析获得的力矩-位移曲线与实验结果吻合良好。使用FEM评估了影响参数对连接行为的影响程度。

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  • 来源
    《Structural engineering international》 |2017年第4期|546-557|共12页
  • 作者

    Guo Zhaosheng; He Wubin; Bai Xiaohong; Chen Y. Frank;

  • 作者单位

    Taiyuan Univ Technol, Coll Architecture & Civil Engn, Taiyuan, Shanxi, Peoples R China;

    Taiyuan Univ Technol, Coll Architecture & Civil Engn, Taiyuan, Shanxi, Peoples R China;

    Taiyuan Univ Technol, Coll Architecture & Civil Engn, Taiyuan, Shanxi, Peoples R China;

    Taiyuan Univ Technol, Coll Architecture & Civil Engn, Taiyuan, Shanxi, Peoples R China|Penn State Univ, Dept Civil Engn, University Pk, PA 16802 USA;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    PHC pile; pile cap; seismic performance; bearing capacity; ductility;

    机译：PHC桩;桩帽;抗震性能;承载力;延性;

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