[1]贾文君.地震动强度增大过程中边坡土体的损伤演化及其计算方法研究[J].华南地震,2022,(03):116-122.[doi:10.13512/j.hndz.2022.03.14]
 JIA Wenjun.Study on Damage Evolution and Calculation Method of Slope Soil During the Increase of Ground Motion Intensity[J].,2022,(03):116-122.[doi:10.13512/j.hndz.2022.03.14]
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地震动强度增大过程中边坡土体的损伤演化及其计算方法研究()
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华南地震[ISSN:1006-6977/CN:61-1281/TN]

卷:
期数:
2022年03期
页码:
116-122
栏目:
土木工程防震减灾
出版日期:
2022-09-15

文章信息/Info

Title:
Study on Damage Evolution and Calculation Method of Slope Soil During the Increase of Ground Motion Intensity
文章编号:
1001-8662(2022)03-0116-07
作者:
贾文君
甘肃交通职业技术学院,兰州 730207
Author(s):
JIA Wenjun
Gansu Vocational and Technical College of Communications , Lanzhou 730070, China
关键词:
黄土边坡模型试验地震动土体损伤
Keywords:
Loess slope Model testGround motionSoil damage
分类号:
P642.22
DOI:
10.13512/j.hndz.2022.03.14
文献标志码:
A
摘要:
地震作用下边坡失稳破坏过程也是土体损伤变形演化过程,当前边坡模型试验中土体损伤的定量计算方法尚未提出;研究以兰州新区职教园区内一填方边坡为原型,开展了地震动强度逐级增大条件下边坡失稳破坏的模型试验,研究边坡变形失稳过程中相关物理量随地震动强度的变化规律,进而提出土体损伤的计算公式。研究结果发现:在地震动强度增大过程中,坡肩土体损伤变形最为显著,传递函数频谱随地震动强度增大呈现有规律的减小变化,土体阻尼比随地震强度增大呈现指数函数增大变化,据此提出了基于归一化阻尼比的土体损伤量计算公式,该公式计算的土体损伤量也呈现指数函数增大变化,反映了地震动作用下土体的非线性损伤变形破坏过程。文中提出的土体损伤量计算方法可为基于模型试验的边坡稳定性评价提供理论依据。
Abstract:
The process of slope instability and failure under earthquake is also the evolution process of slope soil damage and deformation. At present,the quantitative calculation method of soil damage in slope model test has not been proposed. Taking a filling slope on the west side of a college campus in Higher Vocational Education Zone of Lanzhou New Area as the prototype,the model tests of slope instability under the gradually increasing the ground motion intensity is carried out. In the process of slope deformation and instability,the variation law of transfer func?tion spectrum with ground motion intensity is analyzed and studied,and then the calculation method of soil damage is put forward. The results show that the damage and deformation of the soil at the slope shoulder is the most signifi?cant in the process of increasing the ground motion intensity, the frequency spectrum of the transfer function de?crease regularly with the increase of the ground motion intensity, and the damping ratio of the soil in this area changes exponentially with the increase of ground motion intensity. Therefore,a formula for calculating the amount of soil damage based on the normalized damping ratio is proposed,and the amount of soil damage calculated by the formula also shows the law of exponential function increase,reflecting the nonlinear damage,deformation and fail?ure process of soil mass under the ground motion. The calculation method of soil damage proposed in this paper could provide a theoretical basis for slope stability evaluation based on model test.

参考文献/References:

[1] 赵锡宏,孙红,罗冠威. 损伤土力学[M].上海:同济大学出版社,2002.
[2] 李广信.高等土力学[M].北京:清华大学出版社,2004.
[3] Desai C S,Ma Y. Modeling of joints and interfaces using the disturbed-state concept[J]. Int J Numer Anal Meth Geomech, 1992,16(9):623-653.
[4] Desai C S,Shao C,Park I J. Disturbed state modeling of cyclic behavior of soils and interfaces in dynamic soils-structure[C]//Proceedings of the Ninth International Conference on Computer Methods and Advances in Geomechains. New York:ACM Press,1997:31-42.
[5] Desai C S. Mechanics of materials and interfaces:the disturbed state concept[M]. Boca Raton:CRC Press,2001.
[6]沈珠江,章为民. 损伤力学在土力学中的应用[M]//第三届全国岩土力学数值分析与解析方法讨论会论文集.北京:中国建筑工业出版社,1988.
[7]沈珠江.结构性黏土的弹塑性损伤模型[J].岩土工程学报,1993,15(3):21-28.
[8]杨林德,刘齐建.土-结构物接触面统计损伤本构模型[J].地下空间与工程学报,2006,2(1):79-82.
[9]周家伍,刘元雪,李忠友.基于能量方法的结构性土体损伤演化规律研究[J].岩土工程学报,2013,35(9):1689-1695.
[10]林皋,朱彤,林蓓. 结构动力模型试验的相似技巧[J].大连理工大学学报,2000,40(01):1-8.
[11]李旭东,王平,王丽丽,等.强震作用下坡顶建筑荷载对边坡稳定性影响研究[J].地震工程学报,2021,43(5):1220-1227.
[12]陈金昌,王兰民,王平,等.基于振动台试验的纯黄土边坡动力响应研究[J].地震工程学报,2020,42(2):529-535.
[13]蒋良潍,姚令侃,吴伟,等.传递函数分析在边坡振动台模型试验的应用探讨[J]. 岩土力学,2010,31(05):1368-1374.

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备注/Memo

备注/Memo:
收稿日期:2022-03-10
基金项目:甘肃省教育厅2019年度高等学校创新能力提升项目(2019A-229)
作者简介:贾文君(1980-),男,工学硕士,副教授,主要从事城市轨道交通、黄土及地基基础等方面的研究和教学工作。E-mail: 594391316@qq.com
更新日期/Last Update: 2022-09-15