基于离散单元法碎石垫层隔震性能的宏细观分析

张昕; 戴国亮; 栾阳; 张倩; 贾其军

doi:10.11899/zzfy20230316

基于离散单元法碎石垫层隔震性能的宏细观分析

doi: 10.11899/zzfy20230316

张昕^1,,
戴国亮^{2, 3},
栾阳^{2, 3},
张倩^{2, 3},
贾其军^1, ,

1.
中国路桥工程有限责任公司, 北京 100011
2.
东南大学，土木工程学院, 南京 210096
3.
东南大学，混凝土及预应力混凝土结构教育重点实验室, 南京 210096

基金项目: 中交集团重点科研课题（2016-zjjt-24）

详细信息

作者简介:
张昕，男，生于1975年。高级工程师。主要从事工程项目管理及岩土工程抗震方面研究工作。E-mail：zhangx@crbc.com

通讯作者:
贾其军，男，生于1976年。博士，高级工程师。主要从事岩土工程研究工作。E-mail：18513671198@163.com

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出版历程
- 收稿日期: 2022-03-24
- 刊出日期: 2023-08-31

Macro and Micro Analysis of Seismic Isolation Performance of Gravel Cushion Based on Discrete Element Method

Zhang Xin^1
,,
Dai Guoliang^{2, 3},
Luan Yang^{2, 3},
Zhang Qian^{2, 3},
Jia Qijun^{1
, ,}

1.
China Road and Bridge Corporation, Beijing 100011, China
2.
School of Civil Engineering, Southeast University, Nanjing 210096, China
3.
Key Laboratory of Concrete and Prestressed Concrete Structure of Ministry of Education, Southeast University, Nanjing 210096, China

摘要

摘要: 为研究非接触桩箱复合基础中碎石垫层隔震性能，采用颗粒流软件PFC^3D对碎石垫层和沉箱进行模拟分析，从宏细观多角度对碎石垫层隔震性能进行分析。研究结果表明，竖向压力、垫层厚度对垫层隔震效果的影响较大；地震动加载过程中，垫层底部颗粒水平相对位移较大，垫层中上部颗粒水平相对位移较小，颗粒配位数及垫层孔隙率与碎石垫层隔震效果关系密切。
- 碎石垫层 /
- 基础 /
- 隔震 /
- 减震率 /
- 颗粒 /
- 离散元
Abstract: In order to study the seismic behavior of gravel cushion set up in the unconnected piles-caisson foundation, particle flow analysis software PFC^3D was used to numerically simulate the shake table tests of gravel cushion and caisson and to study the seismic isolation performance of the gravel cushion from macro and micro view. The results shows that vertical pressure and thickness of the cushion have significant influence on isolation effect of the gravel cushion. During ground shaking loading, the horizontal relative displacement of particles at the bottom of the cushion is large, and the horizontal relative displacement of particles at the middle and upper part of the cushion is small. The changes of particle coordination number and cushion porosity are closely related to the seismic isolation effect of gravel cushion.
- Gravel cushion /
- Foundation /
- Seismic isolation /
- Vibration reduction ratio /
- Particle /
- Discrete element method

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图 1 非接触桩箱复合基础组成示意

Figure 1. Non-contact pile box composite foundation

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图 2 垫层数值模型

Figure 2. Numerical simulation model of bedding layer

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图 3 输入地震动加速度时程曲线

Figure 3. Input seismic recording acceleration timehistory curves

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图 4 非接触桩箱复合基础水平承载力变化曲线

Figure 4. Horizontal bearing capacity change curves of non-contact pile box composite foundation

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图 5 非接触桩箱复合基础水平荷载-位移关系曲线

Figure 5. Horizontal load-displacement relationship curves of non-contact pile box composite foundation

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图 6 不同时刻垫层内颗粒平均位移

Figure 6. Average displacement of particles of bedding layer under different moments

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图 7 不同时刻垫层内颗粒平均加速度

Figure 7. Average acceleration of particles of bedding layer under different moments

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图 8 不同时刻垫层内颗粒平均位移

Figure 8. Average particle displacement of bedding layer under different moments

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图 9 不同时刻垫层内颗粒平均加速度

Figure 9. Average acceleration of particles of bedding layer under different moments

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图 10 不同时刻垫层内颗粒平均位移

Figure 10. Average particle displacement of particles of bedding layer under different moments

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图 11 不同时刻垫层内颗粒平均加速度

Figure 11. Average acceleration of particles of bedding layer under different moments

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图 12 垫层平均孔隙率随时间变化曲线

Figure 12. Average porosity curves of bedding layer

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图 13 垫层平均配位数随时间变化曲线

Figure 13. Average matting coordination number of bedding layer

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图 14 输入地震动加速度时程曲线

Figure 14. Input acceleration timehistory curve

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图 15 垫层不同高度处平均孔隙率随时间变化曲线

Figure 15. Mean porosity curves at different heights of bedding layer

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图 16 垫层不同高度处颗粒平均配位数随时间变化曲线

Figure 16. Curve of mean particle coordination number at different heights of bedding layer

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表 1 垫层材料参数

Table 1. Bedding material parameters

参数	数值
粒径/mm	5.2，3.1～7.0，0.1～9.9
厚度/mm	20.0，30.0，40.0，60.0
阻尼比	0.055
黏聚力/kPa	0
重度/（kN·m⁻³）	16.51
颗粒间摩擦系数	0.57
侧限压缩模量/MPa	60.1

下载: 导出CSV

表 2 隔震率对比

Table 2. Comparison of isolation ratio

方案编号	垫层厚度/mm	压力/kPa	输入加速度/（m·s⁻²）	输出加速度/（m·s⁻²）	数值模拟减震率/%	文献减震率/%	误差/%
1-1	200	3.5	3.44	1.70	50.6	57.1	11.4
1-2	200	8.3	3.40	2.35	30.9	32.1	3.8
1-3	300	3.5	3.41	1.52	55.4	36.84	33.5
1-4	300	8.3	3.41	1.78	47.8	44.11	7.7

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参考文献(17)

董学武, 周世忠, 2004. 希腊里翁-安蒂里翁大桥的设计与施工. 世界桥梁, 32（4）: 1—4

Dong X. W. , Zhou S. Z. , 2004. Design and construction of Rion-Antirion bridge in Greece. World Bridges, 32(4): 1—4. (in Chinese)

范立础, 王君杰, 2001. 桥梁抗震设计规范的现状与发展趋势. 地震工程与工程振动, 21（2）: 70—77 doi: 10.3969/j.issn.1000-1301.2001.02.013

Fan L. C. , Wang J. J. , 2001. Design code for earthquake-resistance of bridges: current situation and trend. Earthquake Engineering and Engineering Vibration, 21(2): 70—77. (in Chinese) doi: 10.3969/j.issn.1000-1301.2001.02.013

李志强, 栾阳, 张倩等, 2018. 碎石垫层隔震性能离散元数值分析. 公路, 63（1）: 158—164.

刘宗华, 2012. 土耳其Izmit海湾大桥主塔基础设计与施工构思. 施工技术, 41（17）: 11—13, 20

Liu Z. H. , 2012. The conception of main tower foundation design and construction for Izmit bay bridge in turkey. Construction Technology, 41(17): 11—13, 20. (in Chinese)

吕伟华, 缪林昌, 2013. 刚性桩复合地基桩土应力比计算方法. 东南大学学报（自然科学版）, 43（3）: 624—628

Lv W. H. , Miao L. C. , 2013. Calculation method of pile-soil stress ratio of rigid pile composite foundation. Journal of Southeast University (Natural Science Edition), 43(3): 624—628. (in Chinese)

南文文, 2015. 沉箱-垫层-桩复合深水基础水平承载性能研究. 南京: 东南大学, 43—51

Nan W. W., 2015. Experimental study on bearing performance of caisson-cushion-pile deepwater composite foundation under lateral loads. Nanjing: Southeast University, 43—51. (in Chinese)

陶景晖, 梁书亭, 龚维明等, 2009. 高层建筑刚性桩复合地基承载受力性状研究. 东南大学学报（自然科学版）, 39（S2）: 238—245

Tao J. H. , Liang S. T. , Gong W. M. , et al. , 2009. Study on bearing behavior of composite foundation with rigid pile for high-rise buildings. Journal of Southeast University (Natural Science Edition), 39(S2): 238—245. (in Chinese)

魏磊, 2013. 村镇建筑基础下碎石垫层隔震性能试验研究. 西安: 西安建筑科技大学, 21—35

Wei L., 2013. An experimental research on seismic reduced function gravel layer under rural buildings foundation. Xi'an: Xi'an University of Architecture and Technology, 21—35. (in Chinese)

姚国伟, 2011. 复合地基褥垫层减震研究. 广州: 广州大学, 38—41

Yao G. W., 2011. Study on seismic reduced function of composite foundation cushion. Guangzhou: Guangzhou University, 38—41. (in Chinese)

赵少伟, 窦远明, 郭蓉等, 2005. 基础下砂垫层隔震性能振动台试验研究. 河北工业大学学报, 34（3）: 92—97 doi: 10.14081/j.cnki.hgdxb.2005.03.019

Zhao S. W. , Dou Y. M. , Guo R. , et al. , 2005. An experimental study of isolating properties of sand cushion under the foundation by shaking table. Journal of Hebei University of Technology, 34(3): 92—97. (in Chinese) doi: 10.14081/j.cnki.hgdxb.2005.03.019

Anastasopoulos I. , Gazetas G. , Loli M. , et al. , 2010. Soil failure can be used for seismic protection of structures. Bulletin of Earthquake Engineering, 8(2): 309—326. doi: 10.1007/s10518-009-9145-2

Biesiadecki G. L., Dobry R., Leventis G. E., et al., 2004. Rion- Antirion Bridge foundations: A blend of design and construction innovation. In: Fifth International Conference on Case Histories in Geotechnical Engineering. New York: University of Missouri, 16.

Combault J. , Pecker A. , Teyssandier J. P. , et al. , 2005. Rion-antirion bridge, Greece - concept, design, and construction. Structural Engineering International, 15(1): 22. doi: 10.2749/101686605777963387

Dobry R. , Pecker A. , Mavroeidis G. P. , et al. , 2003. Damping/global energy balance in FE model of bridge foundation lateral response. Soil Dynamics and Earthquake Engineering, 23(6): 483—495. doi: 10.1016/S0267-7261(03)00050-2

Lyngs J. H., Kasper T., Bertelsen K. S., 2013. Modelling of soil-structure interaction for seismic analyses of the Izmit Bay Bridge. In: Proceedings of the 18 th International Conference on Soil Mechanics and Geotechnical Engineering. Paris: ICSMGE, 763—768.

Pfauth T. , Poling J. , 2017. Strain measurement in a specimen subjected to out-of-plane movement: Using an open-source digital image correlation-based tool. The Journal of Purdue Undergraduate Research, 7(1): 7.

Yang D., Dobry R., Peck R. B., 2001. Foundation-soil-inclusion interaction modelling for rion-antirion bridge seismic analysis. In: Fourth International Conference on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics. New York: University of Missouri, 620.

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