成层软土地基PHC管桩抗震性能研究

郑刚; 张楠; 巴振宁; 张天奇

成层软土地基PHC管桩抗震性能研究 English Version

郑刚^{1, 2},
张楠^{1, 2},
巴振宁²,
张天奇^{1, 2}

1. 滨海土木工程结构与安全教育部重点实验室,天津 300072; 2.天津大学建筑工程学院,天津 300072

详细信息

作者简介:
郑刚(1967- )，男，博士，教授，博士生导师，从事土力学及岩土工程教学与科研工作。E-mail: zhenggang1967@163.com。

中图分类号: TU475.1
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出版历程
- 收稿日期: 2013-07-18
- 发布日期: 2013-11-24

Seismic performance of PHC pipe piles in layered soft soils

ZHENG Gang^{1, 2},
ZHANG Nan^{1, 2},
BA Zhen-ning²,
ZHANG Tian-qi^{1, 2}

1. MOE Key Laboratory of Coast Civil Structure Safety, Tianjin 300072, China; 2. Department of Civil Engineering, Tianjin University, Tianjin 300072, China

摘要

摘要: 针对天津成层软土地质条件,建立了考虑框架-桩-成层土动力相互作用的二维数值分析模型,对PHC管桩的抗震性能展开了研究。计算结果表明：在地震力作用下,桩身最危险位置有可能出现在桩顶或软硬土层交界面位置处,并且交界面处桩身弯矩值的大小与土层间的刚度差异有很大关系。此外,还针对影响桩身内力的重要因素进行了参数分析,包括土层厚度、框架层数、桩长及桩径等。分析发现,软土层及其上覆硬壳层厚度变化以及桩径桩长对于桩身内力有较大影响,而上部结构层数影响则较小。
- PHC管桩 /
- 抗震性能 /
- 交界面 /
- 桩身弯矩
Abstract: Considering the layered soft soils in Tianjin, a 2D numerical model for analyzing kinematic interaction of frame-pile-layered soils is established to ascertain the seismic performance of PHC pipe piles. The results reveal that the risky region of piles due to seismic load is likely to be at pile head or near the interface between the soft and stiff soil layers. Moreover, the magnitude of bending moment on the piles at such interface largely depends on the stiffness ratio of the adjacent layers. Besides, other important factors which influence the seismic performance of PHC pipe piles are highlighted, such as soil thickness, floors of frame, pile length and pile diameter. It is suggested that the thickness of soft soils and the soils above the piles and the piles diameter have important influence on the bending moment of the piles, while the floors of frame has little impact on them.
- PHC pipe pile /
- seismic performance /
- interface /
- bending moment

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参考文献(8)

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