饱和砂土场地2×2高承台直斜群桩动力响应规律研究∗

张健

您当前的位置：

首页 >

文章列表页 >

饱和砂土场地2×2高承台直斜群桩动力响应规律研究∗

更新时间：2025-09-25

- 饱和砂土场地2×2高承台直斜群桩动力响应规律研究∗
- Study on Dynamic Response Law of 2×2 Vertical and Batter Pile Groups under Elevated Pile Cap in Saturated Sand
- 防灾减灾工程学报 2020年第2期页码：204-213
- 作者机构：
  
  河北工业大学土木与交通学院,天津,300401
- 作者简介：
- 基金信息：
  
  国家自然科学基金项目（51778207）、河北省自然科学基金项目（E2018202107）、河北省研究生创新资助项目（CXZZBS2019041）资助
- DOI：
  中图分类号： TU435
- 纸质出版：2020
- 稿件说明：
移动端阅览
张健,李雨润,闫志晓,戎贤.饱和砂土场地2×2高承台直斜群桩动力响应规律研究∗[J].防灾减灾工程学报,2020,(2):204-213

ZHANG Jian. Study on Dynamic Response Law of 2×2 Vertical and Batter Pile Groups under Elevated Pile Cap in Saturated Sand[J]. 2020, (2): 204-213.
张健,李雨润,闫志晓,戎贤.饱和砂土场地2×2高承台直斜群桩动力响应规律研究∗[J].防灾减灾工程学报,2020,(2):204-213 DOI：

ZHANG Jian. Study on Dynamic Response Law of 2×2 Vertical and Batter Pile Groups under Elevated Pile Cap in Saturated Sand[J]. 2020, (2): 204-213. DOI：

摘要

为研究饱和砂土场地地震液化情况下直斜群桩水平动力响应规律，使用浙江大学ZJU400土工离心试验设备进行了饱和砂土场地2×2高承台直斜群桩的离心机振动台模型试验，通过两组试验分别对于不同土层处的加速度时程以及孔压比进行分析。同时，结合饱和砂土的液化情况，分别针对2×2高承台直斜群桩在振动过程中承台水平动力响应以及桩身弯矩峰值的变化进行了对比分析。试验结果表明：随着振动强度的增大，饱和砂土层液化深度逐渐增加，尤其在近桩位置土层孔压比变化更为明显；直群桩承台水平加速度峰值在一定范围内出现了放大的现象，而斜群桩承台则基本未发生此显现；随振动强度的增加桩身弯矩峰值分布发生较大变化，其变化情况与饱和砂土液化有着较为密切的关系，在0.05g和0.1g工况下斜群桩桩身弯矩峰值明显小于直群桩，而0.3g工况时斜群桩桩身弯矩峰值出现了显著增加的现象并超过了同工况下直群桩情况。

Abstract

In order to study the horizontal dynamic response law of vertical and batter pile groups under the condition of seismic liquefaction in saturated sand

the centrifuge shaking table tests on 2×2 vertical and batter pile groups under elevated pile cap in saturated sand were carried out by using ZJU400 geotechnical centrifugal test equipment of Zhejiang University. Two sets of experiments were used to analyze the acceleration time history and pore pressure ratio in different soil layers. At the same time

combined with the liquefaction situation of saturated sand

the horizontal dynamic response of the pile cap and the change of the bending moment of the pile body were compared and analyzed for the 2×2 vertical and batter pile groups under elevated pile cap. The results show that: with the increase of vibration intensity

the liquefaction depth of saturated sand increases gradually

especially in the near-pile region

the change of pore pressure ratio is more obvious; the horizontal acceleration peak of the vertical pile group cap amplifies within a certain range

while that phenomenon does not occur for the batter pile group cap; With the increase of vibration intensity

the peak distribution of the bending moment of the pile body changes greatly. The change has a close relationship with the liquefaction of saturated sand. Under the conditions with peak accelerations of 0.05g and 0.1g

the peak bending moment of the batter pile group is obviously smaller than that of the vertical pile group

and the peak bending moment of the batter pile group shows a significant increase under the condition with peak acceleration of 0.3g and exceeds that of the vertical pile group with the same working condition.

关键词

Keywords

references

Choobbasti A J，Saadati M，Tavakoli H R.Seismic response of pile foundations in liquefiable soil:parametric study[J].Arabian Journal of Geosciences，2012,5(6):1 307-1 315.

Samui P，Bhattacharya S，Sitharam T G.Support vector classifiers for prediction of pile foundation performance in liquefied ground during earthquakes[J].International Journal of Geotechnical Earthquake Engineering，2012,3(2):42-59.

Su L，Tang L，Ling X Z，et al.Pile response to liquefaction-induced lateral spreading:a shake-table investigation[J].Soil Dynamic Earthquake Engineering，2016,82:196-204.

Li G J，Motamed R.Finite element modeling of soil-pile response subjected to liquefaction-induced lateral spreading in a large-scale shake table experiment[J].Soil Dynamic Earthquake Engineering，2017,92:573-584.

凌贤长，郭明珠，王东升，等.液化场地桩基桥梁震害响应大型振动台模型试验研究[J].岩土力学，2006,27(1):7-10,22. Ling X Zh，Guo M Zh，Wang D Sh，et al.Large-scale shaking table model test of seismic response of bridge of pile foundation in ground of liquefaction[J].Rock and Soil Mechanics，2006,27(1):7-10,22.(in Chinese)

刘春辉，唐亮，凌贤长，等.液化场地桥梁群桩基抗震分析简化方法[J].防灾减灾工程学报，2014,34(5):566-570. Liu Ch H，Tang L，Ling X Zh，et al.Simplified method for seismic analysis of bridge pile group foundation in liquefiable soils[J].Journal of Disaster Prevention and Mitigation Engineering，2014,34(5):566-570.(in Chinese)

黄占芳，王显耀，吴植安，等.液化砂土中单桩地震响应振动台试验研究[J].振动与冲击，2012,31(20):189-192. Huang Zh F，Wang X Y，Wu Zh A，et al.Shaking table test for single pile-soil dynamic interaction in liquefied foundation soil[J].Journal of Vibration and Shock，2013,31(20):189-192.(in Chinese)

Panah A K，Mashhoud H J，Yin J H，et al.Shaking table investigation of effects of inclination angle on seismic performance of micropiles[J].International Journal of Geomechanics，2018,18(11):04018142.

李雨润，张雨雷，陈张升，等.液化土中对称双斜桩动力反应特征及p-y曲线规律试验研究[J].岩石力学与工程学报，2018,37(1):239-250. Li Y R，Zhang Y L，Chen Zh Sh，et al.Dynamic response and p-y curve of symmetric inclined piles in liquefied soil[J].Chinese Journal of Rock Mechanics and Engineering，2018,37(1):239-250.(in Chinese)

李雨润，王佳玮，邹泽，等.变频规则波输入下直斜群桩动力响应对比试验研究[J].防灾减灾工程学报，2019,39(2):191-200. Li Y R，Wang J W，Zou Z，et al.Comparative experimental study on dynamic response of straight inclined piles under variable frequency regular wave input[J].Journal of Disaster Prevention and Mitigation Engineering，2019,39(2):191-200.(in Chinese)

苏栋，李相菘.可液化土中单桩地震响应的离心机试验研究[J].岩土工程学报，2006,28(4):423-427. Su D，Li X S.Centrifuge investigation on seismic response of single pile in liquefiable soil[J].Chinese Journal of Geotechnical Engineering，2006,28(4):423-427.(in Chinese)

Li Z，Escoffier S，Kotronis P.Centrifuge modeling of batter pile foundations under earthquake excitation[J].Soil Dynamic Earthquake Engineering，2016,88:176-190.

Liu X，Wang R，Zhang J M.Centrifuge shaking table tests on 4×4 pile groups in liquefiable ground[J].Acta Geotechnica，2018,13(6):1 405-1 418.

王睿，张建民，张嘎.侧向流动地基单桩基础离心机振动台试验研究[J].工程力学，2012,29(10):98-105. Wang R，Zhang J M，Zhang G.Centrifuge shaking table test on single pile in lateral spreading soil[J].Engineering Mechanics，2012,29(10):98-105.(in Chinese)

梁发云，陈海兵，黄茂松，等.结构-群桩基础地震响应离心振动台模型试验[J].建筑结构学报，2016,37(9):134-141. Liang F Y，Chen H B，Huang M S，et al.Model test on seismic response of superstructure and pile group[J].Journal of Building Structures，2016,37(9):134-141.(in Chinese)

Whitman R V，Lambe P C.Effect of boundary conditions upon centrifuge experiments using ground motion simulation[J].Geotechnical Testing Journal，ASTM，1986,9(2):61-71.

浏览量

339

下载量

CSCD

文章被引用时，请邮件提醒。

提交

工具集

关联资源

基于粒间接触关系的饱和砂土液化特性研究

饱和砂土场地‑地铁车站地震响应参数敏感性分析