[1] DAI Guoliang, SHI Xiangyuan, GONG Zhiyu, GONG Weiming, et al. Bearing behavior of six-pile thick pile caps under different reinforcement configurations [J]. Journal of Southeast University (English Edition), 2026, 42 (2): 173-186. [doi:10.3969/j.issn.1003-7985.2026.02.004]
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Bearing behavior of six-pile thick pile caps under different reinforcement configurations(
)
不同配筋形式下六桩厚承台承载特性
)Journal of Southeast University (English Edition)[ISSN:1003-7985/CN:32-1325/N]
- Volumn:
- 42
- Issue:
- 2026 2
- Page:
- 173-186
- Research Field:
- Publishing date:
- 2026-05-29
Info
- Title:
- Bearing behavior of six-pile thick pile caps under different reinforcement configurations
- 不同配筋形式下六桩厚承台承载特性
- Author(s):
- DAI Guoliang, SHI Xiangyuan, GONG Zhiyu, GONG Weiming
- School of Civil Engineering, Southeast University, Nanjing 211189, China
Advanced Ocean Institute of Southeast University, Nantong 226010, China
- Keywords:
- thick pile cap; space truss model; scale model test; numerical simulation; mechanism analysis
- PACS:
- TU473.1
- DOI:
- 10.3969/j.issn.1003-7985.2026.02.004
- Abstract:
- To investigate the bearing behavior and failure modes of six-pile thick pile caps under different reinforcement configurations and explore the optimal reinforcement scheme, this study examined four scaled specimens (S1-S4) with distinct reinforcement designs. The bearing capacity of each pile cap was first calculated using various methods, and laboratory tests were then conducted to determine cracking and ultimate loads. Reinforcement stresses and key strain measurements in the pile caps were monitored, and the crack propagation process was documented in detail. The results demonstrate that the spatial truss model yielded calculations closest to experimental values. Specimen S3 with mesh reinforcement exhibited the highest bearing capacity but required greater steel consumption. The truss-reinforced S4 showed enhanced ductility at failure but posed constructability challenges. Uniformly reinforced S1 delivered the lowest bearing capacity and developed more uneven cracks. Furthermore, a comprehensive analysis of reinforcement stress distribution, internal force flow transfer, and the validity of the plane-section assumption at the pile-cap sides revealed that the mechanical behavior of the six-pile thick pile cap is more closely aligned with the spatial truss model. The concentrated reinforcement scheme at the pile head, as suggested by this model, proves to be an efficient and practical design solution.
- 为研究六桩厚承台在不同配筋下的承载特性和破坏形式,探讨其最优配筋方案,本文针对4个不同配筋方案的缩尺构件(S1~S4),首先按不同方法计算各承台承载力,再通过室内试验得到开裂荷载和破坏荷载,同时监测钢筋应力和承台关键处应变,并对各承台的裂缝发展过程进行详细描述。结果表明:空间桁架模型的计算值与试验值更接近;多层钢筋网配筋的S3承载力最高,但耗钢量较多;桁架配筋的S4破坏更具延性,但其实操性较差;均匀配筋的S1承载力最低,且有更多不均匀的裂缝。然后,结合钢筋应力分布规律、承台内部力流传递规律以及承台侧面平截面假定的验证,可知六桩厚承台受力更符合空间桁架模型,模型所建议的桩顶集中配筋是较为经济和便捷的配筋方案。
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Memo
- Memo:
-
Received: 2025-06-26; Revised: 2025-09-16.
Biography: DAI Guoliang(1975—), male, doctor, professor, daigl@seu.edu.cn.
Foundation items: The National Natural Science Foundation of China (No.52378328, 52208333, 52178317), Research Fund for Advanced Ocean Institute of Southeast University (No.KP202404, GP202403).
Citation: DAI Guoliang, SHI Xiangyuan, GONG Zhiyu, et al. Bearing behavior of six-pile thick pile caps under different reinforcement configurations[J]. Journal of Southeast University (English Edition), 2026, 42(2): 173-186. DOI: 10. 3969/j. issn. 1003-7985. 2026. 02. 004.