[1]李宁,刘冠麟,许建聪,等.降雨条件下边坡有限元强度折减法计算平台开发及其应用[J].水文地质工程地质,2018,45(03):63.[doi:10.16030/j.cnki.issn.1000-3665.2018.03.08]
 LI Ning,LIU Guanlin,XU Jiancong,et al.Development of shear strength reduction method for slope stability analysis under rainfall conditions and its application[J].Hydrogeology & Engineering Geology,2018,45(03):63.[doi:10.16030/j.cnki.issn.1000-3665.2018.03.08]
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降雨条件下边坡有限元强度折减法计算平台开发及其应用()
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《水文地质工程地质》[ISSN:1000-3665/CN:11-2202/P]

卷:
45卷
期数:
2018年03期
页码:
63
栏目:
工 程 地 质
出版日期:
2018-05-15

文章信息/Info

Title:
Development of shear strength reduction method for slope stability analysis under rainfall conditions and its application
文章编号:
1000-3665(2018)03-0063-08
作者:
李宁12刘冠麟1许建聪2张利伟3唐诗晴1吴数1
1.上海理工大学环境与建筑学院,上海200093;2.同济大学地下建筑与工程系,上海200092;3. 四川省城乡规划设计研究院,四川 成都610081
Author(s):
LI Ning12 LIU Guanlin1 XU Jiancong2 ZHANG Liwei3 TANG Shiqing1 WU Shu1
1. School of Environment and Architecture, University of Shanghai for Science and Technology, Shanghai200093, China; 2. Department of Geotechnical Engineering, Tongji University, Shanghai200092, China; 3. Sichuan Institute of Urban Planning and Design, Chengdu,Sichuan610081, China
关键词:
降雨滑坡强度折减法ABAQUS安全系数破坏机理
Keywords:
rainfall-induced landslide strength reduction method ABAQUS safety factor failure mechanism
分类号:
P642.22
DOI:
10.16030/j.cnki.issn.1000-3665.2018.03.08
文献标志码:
A
摘要:
降雨是导致边坡失稳的主要因素。目前,使用有限元强度折减法进行降雨滑坡计算时,过程比较复杂,计算工作量大。同时,对降雨边界的处理更加大了计算的复杂性,从而影响了强度折减法在降雨滑坡计算中的推广应用。为了更加准确、高效地将有限元强度折减法应用于降雨滑坡计算,首先基于Geostudio软件采用迭代算法对降雨入渗边界进行处理,通过计算得到每一时刻边坡内的水压分布,然后利用Fortran编制程序将水压转化为等效结点力并导入ABAQUS中,之后结合“基于场变量的有限元强度折减法”对ABAQUS进行二次开发,最终建立降雨条件下边坡有限元强度折减法计算平台。该平台利用Geostudio考虑了降雨入渗边界的复杂性,克服了ABAQUS软件中不能准确模拟降雨边界的问题。同时采用ABAQUS软件提供的场变量,对有限元强度折减法的计算过程进行简化,提高了计算效率,经过一次计算即可求得每一降雨时刻的边坡稳定系数。通过与传统极限平衡法进行比较,发现两者得出的结果具有较好的一致性,表明该计算平台是稳定、可靠的。最后采用该平台对降雨滑坡机理进行研究,研究结果可为边坡防减灾提供参考。
Abstract:
Rainfall is a major cause for slope failures. At present, rainfall-induced slope failure analysis using shear strength reduction method is a complex and time consuming work. Meanwhile, the complexity of rainfall boundary makes such analysis more complex. As a result, the application of shear strength reduction method for slope stability analysis under rainfall conditions is limited. In order to perform such analysis more efficient, Geostudio software was adopted to obtain the pore water pressure within the slope which was then converted to equivalent node forces and passed into ABAQUS software for slope stability analysis. Combined with ‘Field variable based strength reduction FEM’, a secondary development on ABAQUS software was conducted, and a computing platform for slope stability analysis under rainfall conditions using shear strength reduction FEM was developed. This computing platform overcome the limitation of ABAQUS in simulating rainfall boundary by using Geostudio software, and promotes computational efficiency based on the field variable provided by ABAQUS software. To investigate the feasibility of the computing platform, a comparing study was performed. It was found that the results from the computing platform are in good agreement with that from the traditional limit equivalent method. This indicates the reliability of the computing platform. The study on the mechanism of rainfall-induced slope failure was then performed using the proposed computing platform.

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备注/Memo

备注/Memo:
收稿日期: 2017-11-01; 修订日期: 2018-01-15
基金项目: 国家自然科学基金项目资助(40872179;U1765110);上海市自然科学基金项目资助(16ZR1423300)
第一作者: 李宁(1982-),男,讲师,博士,主要从事边坡、隧道稳定性研究。E-mail:lining0017@163.com
更新日期/Last Update: 2018-05-15