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基于LADE–DUNCAN模型的生物酶改良膨胀土弹塑性本构关系研究

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成果类型:
期刊论文
论文标题(英文):
Study on elasto-plastic constitutive relation of bioenzyme-treated expansive soil based on LADE-DUNCAN model
作者:
文畅平
通讯作者:
Wen, Changping(wcp13739071598@163.com)
作者机构:
[文畅平] School of Civil Engineering, Central South University of Forestry and Technology, Changsha
410018, China
Hunan Engineering Laboratory for Manufacturing and Application Technology of Modern Timber Structural Engineering Materials, Central South University of Forestry and Technology, Changsha
[文畅平] 410018, China <&wdkj&> Hunan Engineering Laboratory for Manufacturing and Application Technology of Modern Timber Structural Engineering Materials, Central South University of Forestry and Technology, Changsha
[文畅平] 410018, China
语种:
中文
关键词:
生物酶改良膨胀土;LADE-DUNCAN模型;弹塑性本构关系
关键词(英文):
bioenzyme-treated expansive soil;LADE-DUNCAN model;elasto-plastic constitutive
期刊:
中南大学学报(自然科学版)
ISSN:
1672-7207
年:
2021
卷:
52
期:
11
页码:
4190-4200
基金类别:
2014DFA53120:国家国际科技合作专项基金 :现代木结构工程材制造 HELFMTS1707:实验室开放基金 2013ZDXK006:湖南省重点学科建设项目
机构署名:
本校为第一机构
院系归属:
土木工程学院
摘要:
基于LADE-DUNCAN模型,研究生物酶改良膨胀土的弹塑性应力–应变关系。首先,开展一系列三轴固结排水剪切试验,得到偏应力q与轴向应变ε_1、体应变ε_v、侧向应变ε_3之间的试验曲线;然后,采用黏结应力σ_0修正LADE-DUNCAN屈服准则;最后,根据三轴试验结果拟合LADE-DUNCAN模型中的各参数与生物酶掺量之间的关系表达式,建立基于生物酶掺量的LADE-DUNCAN弹塑性本构模型。研究结果表明:在不同生物酶掺量下,偏应力q与轴向应变ε_1均表现为硬化型的应力–应变关系,偏应力q与体应变 ε_v均表现为剪缩型的应力–应变关系,q与ε_1,ε_v与ε_1和q与ε_3等试验曲线均近似为双曲线;黏结应力σ_0修正的LADE-DUN...
摘要(英文):
The elasto-plastic stress-strain behavior of bioenzyme-treated expansive soil was studied based on LADE-DUNCAN model. Firstly, according to a series of the triaxial consolidated drained shear tests of bioenzyme-treated expansive soil at different percentages of bioenzyme, the test curves including deviator stress q and axial strain Ε1, bulk strain ΕV, lateral strain Ε3 were obtained, respectively. Secondly, bond stress σ0 was used to modify LADE-DUNCAN yield criterion. Finally, the expressions between the parameters of LADE-DUNCAN model and...

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