期刊论文

Dynamic backbone curve model of bioenzyme-treated expansive soil under cyclic loading

中文

中南大学学报(自然科学版)

1672-7207

2021

52

4

1109-1117

10.11817/j.issn.1672-7207.2021.04.008

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

本校为第一机构

基于Hardin-Drnevich双曲线本构模型,研究生物酶改良膨胀土的动应力-应变关系。首先通过一系列不同生物酶掺量下的动三轴不固结不排水剪切试验,得到生物酶改良膨胀土的动骨干曲线;然后,根据三轴试验结果,分别拟合最大动弹性模量Edmax、最大动应力σdmax、动骨干曲线切线变形模量Edt与生物酶掺量z、围压σ3的回归方程;最后,基于Hardin-Drnevich模型,建立考虑生物酶掺量影响的动骨干曲线模型以及动骨干曲线应力-应变归一化方程。研究结果表明:Hardin-Drnevich模型能很好地描述生物酶改良膨胀土的动骨干曲线双曲线特性,最大动弹性模量Edmax、最大动应力σdmax、动骨干曲线切线变形模量Edt等的回归方...

The dynamic stress-strain properties of bioenzyme-treated expansive soil were studied based on Hardin-Drnevich hyperbola constitutive model. Firstly, a series of the dynamic triaxial unconsolidated undrained shear tests of bioenzyme-treated expansive soil at different ratios of bioenzyme-based soil stabilizer were conducted, and a series of dynamic backbone curves were obtained. Secondly, the regression expressions between the parameters such as the maximum dynamic modulus of elasticity Edmax, the maximum dynamic stress σdmax, the tangent defo...