[1]许德祥,黄明,陈林靖,等.滨海高水位下渗透性风化岩的损伤模型研究[J].自然灾害学报,2017,(06):147-154.[doi:10.13577/j.jnd.2017.0617]
 XU Dexiang,HUANG Ming,CHEN Linjing,et al.Discussion on damage mechanics model of decomposed rock’s permeability in high water level in coastal areas[J].,2017,(06):147-154.[doi:10.13577/j.jnd.2017.0617]
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滨海高水位下渗透性风化岩的损伤模型研究
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《自然灾害学报》[ISSN:/CN:23-1324/X]

卷:
期数:
2017年06期
页码:
147-154
栏目:
出版日期:
2017-12-08

文章信息/Info

Title:
Discussion on damage mechanics model of decomposed rock’s permeability in high water level in coastal areas
作者:
许德祥1 黄明13 陈林靖1 沈启炜2 柴元四2 闫冬雪3
1. 福州大学 土木工程学院, 福建 福州 350108;
2. 中铁十八局集团有限公司, 天津 300222;
3. 重庆大学 土木工程学院, 重庆 400045
Author(s):
XU Dexiang1 HUANG Ming13 CHEN Linjing1 SHEN Qiwei2 CHAI Yuansi2 YAN Dongxue3
1. College of Civil Engineering, Fuzhou University, Fuzhou 350108, China;
2. China Railway 18 Bureau Group Co., Ltd. Tianjin 300222, China;
3. College of Civil Engineering, Chongqing University, Chongqing 400045, China
关键词:
损伤模型流固耦合破坏准则有效应力风化岩
Keywords:
damage modelfluid-soild couplingfailure criterioneffective stressweathered rocks
分类号:
TU4;P315.93;X9
DOI:
10.13577/j.jnd.2017.0617
摘要:
滨海地区风化岩层中高地下水位对地下工程的影响是长期被关注的热点问题。从岩土材料应力-渗流-损伤完全耦合作用下的弹塑性特点出发,提出一种适用于风化岩层的流固耦合弹塑性损伤本构模型。考虑岩土材料抗拉性能和抗压性能的差异,选取修正的Mohr-Coulomb破坏准则作为岩土介质的塑性理论模型,采用有效应力空间进行应力-应变计算,把塑性计算与损伤计算进行解耦,并对有效应力进行谱分解,分析了拉、压不同状态应力下岩土体材料损伤演化的不同规律,利用得到的应力、应变和损伤变量,与介质的渗流参数建立相应的关系,实现了应力-渗流-损伤的完全耦合。此外,基于Abaqus软件平台及回映算法编制了相应的非线性程序,结合算例将所得计算结果进行了系统分析,初步验证了该理论的可靠与合理性。研究成果可为滨海城市中深基坑开挖诱发地层渗透破坏等灾害的控制提供理论依据。
Abstract:
The influence of high underground water on the underground engineering has been concerned over a long time in the coastal region covered by weathered rock. Considering the elastoplastic geotechnical material coupled with the stress and seepage, an elastoplastic damage constitutive model coupling fluid-solid is presented, which is suitable for weathered rocks. The modified Mohr-Coulomb criterion is suggested to consider the differences between tensile and compressive properties of the geotechnical material. The effective stress space concept is employed to determine the stress-strain curve by decoupling the damage calculation and plastic calculation. The damage evolution of geotechnical material is analyzed by decomposing the stress tensor into tensile and compressive stress states. And the different damage evolution of geotechnical material is reflected in different stress states. The relationship of mechanical parameters and permeability is obtained by combinating the factors of stress, strain and damage. Based on the abaqus and the return mapping algorithm, the theory referenced in this paper is applied to an example through developing a nonlinear finite element analysis program, which verifies the reliability and reasonableness of this theory. Results can provide theoretical basis for the control of ground seepage collapse in deep foundation pit excavation in the coastal region.

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备注/Memo

备注/Memo:
收稿日期:2016-11-08;改回日期:2017-06-06。
基金项目:国家自然科学基金(41672290,41202195);福建省自然科学基金(2016J01189)
作者简介:许德祥(1992-),男,硕士研究生,主要从事岩土与地下工程研究.E-mail:xudexiang01@163.com
通讯作者:黄明(1983-),男,副教授,博士,主要从事岩土与地下工程研究.E-mail:huangming05@163.com
更新日期/Last Update: 1900-01-01