Development of a Constitutive Model for Clays Based on Disturbed State Concept and Its Application to Simulate Pile Installation and Setup

2019 ◽  
pp. 95-118
Author(s):  
Firouz Rosti ◽  
Murad Abu-Farsakh
Keyword(s):  
Constitutive Model ◽  
Pile Installation ◽  
Disturbed State Concept

Disturbed State Concept-Based Constitutive Model for Lignosulfonate-Treated Silty Sand

2015 ◽  
Vol 15 (6) ◽  
pp. 04015002 ◽  
Author(s):  
Rasika Athukorala ◽  
Buddhima Indraratna ◽  
Jayan S. Vinod
Keyword(s):  
Constitutive Model ◽  
Silty Sand ◽  
Disturbed State Concept

scholarly journals Fracture Performance of a Large-Stone Asphalt Mixture Based on a Monotonic Tensile Overlay Test

2021 ◽  
Vol 2021 ◽  
pp. 1-11
Author(s):  
Jianhui Wei ◽  
Tao Fu ◽  
Junlin Liang
Keyword(s):  
Constitutive Model ◽  
Fracture Energy ◽  
Asphalt Mixture ◽  
Test Results ◽  
Large Stone ◽  
Loading Mode ◽  
Disturbed State Concept ◽  
Study Results ◽  
Fracture Performance ◽  
Base Course

A large-stone asphalt mixture (LSAM) is usually used as the base course of asphalt pavement to prevent the generation of cracks. However, there are few studies on the fracture performance and crack resistance of LSAMs. Under the monotonic tensile loading mode, the overlay test (OT) was explored to investigate the influence of different test factors on the cracking resistance and fracture performance. The study results indicated that a change in temperature and aging results in a variation in fractal dimension, the fracture energy of crack growth is higher than that of crack initiation, and fracture energy is increased to a certain extent by decreased temperature, an increased loading rate or increased aging. Finally, a constitutive model is established based on the disturbed state concept (DSC), and the proposed constitutive model is consistent with the test results.

scholarly journals Constitutive Modeling of Physical Properties of Coastal Sand during Tunneling Construction Disturbance

2021 ◽  
Vol 9 (2) ◽  
pp. 167
Author(s):  
Jian-Feng Zhu ◽  
Hong-Yi Zhao ◽  
Ri-Qing Xu ◽  
Zhan-You Luo ◽  
Dong-Sheng Jeng
Keyword(s):  
Constitutive Model ◽  
Constitutive Relationship ◽  
Initial Void Ratio ◽  
Coastal Cities ◽  
Disturbed State Concept ◽  
Strain Relationship ◽  
Internal Angle ◽  
Concept Theory ◽  
Relationship Of ◽  
Disturbance Function

This paper presents a simple but workable constitutive model for the stress–strain relationship of sandy soil during the process of tunneling construction disturbance in coastal cities. The model was developed by linking the parameter K and internal angle φ of the Duncan–Chang model with the disturbed degree of sand, in which the effects of the initial void ratio on the strength deformation property of sands are considered using a unified disturbance function based on disturbed state concept theory. Three cases were analyzed to investigate the validity of the proposed constitutive model considering disturbance. After validation, the proposed constitutive model was further incorporated into a 3D finite element framework to predict the soil deformation caused by shield construction. It was found that the simulated results agreed well with the analytical solution, indicating that the developed numerical model with proposed constitutive relationship is capable of characterizing the mechanical properties of sand under tunneling construction disturbance.

Studies on the disturbed state concept constitutive model of the rockfill materials

2010 ◽  
pp. 79-85
Author(s):  
Jiajun Pan ◽  
Guanqi Wang ◽  
Raoxi Bao ◽  
Han Xu
Keyword(s):  
Constitutive Model ◽  
Disturbed State Concept ◽  
Rockfill Materials

scholarly journals Modelling the Triaxial Compression Behavior of Loess Using the Disturbed State Concept

2021 ◽  
Vol 2021 ◽  
pp. 1-17
Author(s):  
Yali Xu ◽  
Panpan Guo ◽  
Yixian Wang ◽  
Cheng-Wei Zhu ◽  
Kang Cheng ◽  
...  
Keyword(s):  
Constitutive Model ◽  
Triaxial Compression ◽  
Loess Soil ◽  
Confining Pressure ◽  
Structural Effect ◽  
Structural Behavior ◽  
Disturbing Function ◽  
Engineering Practice ◽  
Model Based ◽  
Disturbed State Concept

This paper investigates the triaxial compression behaviour of Q3 loess soil and the construction of a constitutive model accounting for the structural effect of loess on the basis of the disturbed state concept. By analyzing the triaxial compression testing results, we have established a new disturbing function with respect to the volumetric and shear moduli parameters. A research into the evolution laws of the disturbing function was also conducted, followed by the construction of a constitutive model for loess soil as well as the verification of the constitutive model with model test results. The results indicate that the double-parameter disturbing function evolves in an exponential form, capturing well the effect of moisture content and confining pressure on the loess structural behavior. The parameters of the constructed constitutive model based on the disturbed state are easy to be obtained and have clarified physical meanings. Considering the effectiveness in capturing the structural behavior of the loess, the constructed constitutive model has a great potential to be applied in the engineering practice in the loess area. The constructed constitutive model based on the disturbed state concept provides new ideas for the study of the structural constitutive model of loess, which is theoretically significant.

Sign in / Sign up

Export Citation Format

Share Document