Shear performance evaluation of PHC piles under different levels of axial load ratio
Shear performance evaluation of PHC piles under different levels of axial load ratio
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DOI：
10.1002/eqe.3655
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发表时间：
2022-04
影响因子：
4.5
通讯作者：
Y. P. Oktiovan;T. Otaki;T. Obara;S. Kono;Y. Asai;Katsumi Kobayashi;Hidekazu Watanabe;D. Mukai
中科院分区：
文献类型：
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作者：
Y. P. Oktiovan;T. Otaki;T. Obara;S. Kono;Y. Asai;Katsumi Kobayashi;Hidekazu Watanabe;D. Mukai
预制预应力高强搅拌混凝土(PHC)桩因其承载能力高，是日本常用的桩型之一。自20世纪70年代以来，这些桩一直被用作工业标准，作为抗震基础系统的一部分。本研究的重点是考察PHC桩在大地震荷载作用下的抗剪性能。对3根PHC空心桩试件进行了轴向恒压、恒拉、准静力反对称水平荷载试验。使用有限元分析进行了研究，以再现在实验期间发生的损伤。从桩的整体性状和局部性状两个方面对试验结果和分析结果进行了比较。有限元模型能够模拟试件在轴向压缩载荷作用下发生的轴向劈裂裂纹。此外，还进行了轴压比和剪跨径比对PHC桩抗剪承载力和破坏模式的影响的参数研究。将研究结果和PHC桩数据库的结果与日本建筑学会(AIJ)的PHC桩指南中提出的抗剪设计公式进行了比较。
Precast prestressed high‐strength spun concrete (PHC) piles are one of the common types of piles used in Japan due to its high bearing capacity. These piles have been utilized as an industrial standard since the 1970s as part of earthquake‐resilient foundation systems. The focus of this research is to examine the shear performance of PHC piles subjected to large earthquake loads. Three hollow‐section PHC pile specimens were tested under constant compressive or tensile axial load along with quasi‐static antisymmetric lateral load. An investigation using finite element analysis was carried out to reproduce the damage that occurred during the experiment. Comparison between experimental and analytical results were presented in terms of global and local behaviors of the piles. The finite element models were able to simulate axial splitting cracks that occurred for specimens under axial compression load. In addition, a parametric study was conducted to observe the influence of axial load ratio and shear span to diameter ratio on the shear capacity and failure mode of PHC piles. The study results along with the results from a PHC pile database are compared to the shear design equation proposed in the guidelines for PHC piles from the Architectural Institute of Japan (AIJ).