Dissertation > Excellent graduate degree dissertation topics show

Experimental Study on Structural of Loess and Its Structural Constitutive Model

Author: ChenHui
Tutor: LiuMingZhen
School: Xi'an University of Architecture and Technology
Course: Geotechnical Engineering
Keywords: structural loess structural parameter variation regularity statistical damage constitutive model
CLC: TU411
Type: Master's thesis
Year: 2008
Downloads: 140
Quote: 0
Read: Download Dissertation

Abstract


The problem of soil structural characteristics is called as "the focus problem of soil mechanics in the 21st century".The loess is one kind of typical structural soil,its special structure property directly affects the mechanics and engineering property of loess. Therefore the study on the structural of loess is the main content about loess mechanics study this century.In this paper,based on the observation and analysis of a large number of literature reference,the first-class study outcomes on structural property of loess is summarized,and the essential study object of this paper are presented.Some outcomes are obtained as following:A large number of routine triaxial tests are carried out on the unsaturated soil triaxial apparatus for different water content unsaturated intact loess,disturbed loess, saturated intact loess and saturated disturbed loess.Analyzed and studied the stress-strain characteristic,volumetric strain-strain characteristic and matrix suction-stain characteristic under triaxial shear condition.The result indicates,the loess deformation property and volumetric variety property are mainly influenced by the initial water-content and consolidation stress,the water content is the most important factor on matrix suction,the disturbed loess has initial structural characteristic.On basis of a new soil mechanical method,variation characteristics of intact loess structure were studied under triaxial stress condition,and the correlation factors influencing the loess structure are analyzed.Contrasted the structural characteristics variation regularity of two Structure Parameter,the result indicates,the two Structure Parameter are unanimous.Defined a new structural parameter of disturbed loess and another saturated intact loess according to the result that the predecessor had researched previously,and studied variation regularity of disturbed loess and saturated intact loess, confirmed the applicability of the new structural parameter.Grounded on statistical damage theory,a simple damage constitutive model is presented.And carried on the comparison analysis between the test result and the model computed result,it makes clear that the model could simulate the strain softening well, the expected value is close to the strain hardening when the strain is small,the model could describe the strength and deformation behavior reasonably in a certain extent. Afford a new thinking and method of study on loess structural constitutive model.

Related Dissertations

  1. Rate-dependent Endochronic Damage Constitutive Model for Concrete,TU528
  2. Research on the Triple-Shear Unified Cap Model for Soil,TU411.7
  3. Study on Mechanical Characteristic of Rubber Spring Used in Vibrating Screen,O322
  4. Grate coal mine pillar sublevel caving ore control study,TD853.36
  5. Numerical Simulation Study on Constitutive Model with Damage of Energetic Materials,TQ560.1
  6. The Study of Seismic Damage Mechanism of Steel Structure Considering the Effect of Damage Accumulation,TU311.3
  7. One kind of rockfill constitutive model and validation study,TV641.4
  8. Research on Constitutive Model of Frozen Soil Based on Composite Mechanics,P642.14
  9. Dynamic Constitutive Relation of Cement Treated Macadam and Its Application in the Numerical Simulation in Penetration-explosion,O347.3
  10. Low Cycle Fatigue Simulation of Rotor Steel 30Cr2MoV in High Temprature and Damage Assessment,TG115.57
  11. Research on Efficiency Enhancement of Vertical Axis Wind Turbine with Wind Flow Recitifier,TM315
  12. The Influence of State Equation and Constitutive Model in Numerical Simulation of Hypervelocity Impact,O313.4
  13. Static Viscoelastic Constitutive Model Based on Fractional Derivative and Its Application,O631.21
  14. The micromechanical damage studies based on alkali - aluminum silicate cementitious materials new lightweight aggregate concrete,TU528.2
  15. Experiment Study on Expansion Constitutive Model of Expansive Soil in South-To-North Water Transfer Project,TV221.2
  16. Finite Element Analysis of Stress and Deformation on Dam Material Subarea and Configuration of Rockfill Dam with Core Wall,TV31
  17. Experimental Study on Creep Characteristics of Deep Surrounding-Rock,TU452
  18. Study on Influence of Rainfall Infiltration on Slope Stability,TU43
  19. Study on Finite Deformation of the Bar under Tensile-torsion,O347
  20. Research on Size Effect in Micro Blanking of SUS304 Stainless Steel Foil,TG386.2
  21. Finite Deformation Analysis of Hyperelastic Membranes Containing Imperfection,TB383.2

CLC: > Industrial Technology > Building Science > Soil mechanics,foundation engineering > Soil Test > Laboratory tests (indoor soil test )
© 2012 www.DissertationTopic.Net  Mobile