Volume 13 (2022)
Volume 12 (2021)
Volume 11 (2020)
Volume 10 (2019)
Volume 9 (2018)
Volume 8 (2017)
Volume 7 (2016)
Volume 6 (2015)
Volume 5 (2014)
Volume 4 (2013)
Volume 3 (2012)
Volume 2 (2011)
Volume 1 (2010)
Investigation of Fracture Toughness of Shotcrete using Semi-Circular Bend Test and Notched Brazilian Disc test; Experimental Test and Numerical Approach

Mohammad Omidi manesh; vahab sarfarazi; nima babanouri; amir rezaei

Articles in Press, Accepted Manuscript, Available Online from 15 December 2022

https://doi.org/10.22044/jme.2022.12465.2263

Abstract
  This work presents the Semi-Circular Bend (SCB) test and Notched Brazilian Disc (NBD) test of shotcrete using experimental test and Particle Flow Code in two-dimensions (PFC2D) in order to determine a relation between mode I fracture toughness and the tensile strength of shotcrete. Firstly, the micro-parameters ...  Read More

Preparation of Heterogeneous Rock-Like Samples Containing Non-Persistent Notch; Different Layout

Rahim Mortezaie; Seyed Davoud Mohammadi; Vahab Sarfarazi

Volume 13, Issue 4 , October 2022, , Pages 1139-1157

https://doi.org/10.22044/jme.2022.12318.2235

Abstract
  One of the most important tasks in conducting a laboratory research work is how to make the samples. The purpose of this research work is to create heterogeneous rock-like samples containing non-persistent notches. Regarding that, the molds with dimensions of 250 mm x 200 mm x 50 mm are made. A mixture ...  Read More

PFC Simulation of Brazilian Tensile Strength Test in Geomaterials’ Specimens with T-shaped Non-persistent Joints

Vahab Sarfarazi; Hadi Haeri; Fereshteh Bagheri; Erfan Zarrin ghalam; Mohammad Fatehi Marji

Volume 13, Issue 4 , October 2022, , Pages 1189-1209

https://doi.org/10.22044/jme.2022.12418.2252

Abstract
  The tensile strengths of geomaterials such as rocks, ceramics, concretes, gypsum, and mortars are obtained based on the direct and indirect tensile strength tests. In this research work, the Brazilian tensile strength tests are used to study the effects of length and inclination angle of T-shaped non-persistent ...  Read More

Experimental Investigation on Deformation Behavior of Circular Underground Opening in Hard Soil using a 3D Physical Model

Jinwei Fu; M. R. Safaei; H. Haeri; V. Sarfarazi; M. Fatehi Marji; Leige Xu; A. Arefnia

Volume 13, Issue 3 , July 2022, , Pages 727-749

https://doi.org/10.22044/jme.2022.12158.2213

Abstract
  In this work, the mechanical behavior of strata deformation due to drilling and surface loading is investigated using a 3D physical model. For this purpose, a scaled-down physical model is first designed. Then the tunnel drilling and support system are built. The subsidence experiments performed due ...  Read More

Interaction between One Internal Hole and Two Neighboring Joints under Uniaxial Compression using an Experimental Test and a Numerical Simulation

V. Sarfarazi; K. Asgari; Sh. Mohamadi Bolban Abad

Volume 13, Issue 2 , April 2022, , Pages 407-420

https://doi.org/10.22044/jme.2021.11157.2095

Abstract
  The interaction between an internal hole and two surrounded joints under a uniaxial compression are examined using the experimental and discrete element procedures. Inside the concrete sample, two notches and an internal hole are created. The joint angle change from 0° to 90° with an increment ...  Read More

Influence of Single Tunnel and Twin Tunnel on Collapse Pattern and Maximum Ground Movement

V. Sarfarazi; K. Asgari

Volume 13, Issue 1 , January 2022, , Pages 117-128

https://doi.org/10.22044/jme.2021.11088.2085

Abstract
  Particle Flow Code in Two Dimensions (PFC2D) was used in order to examine the influence of single tunnel and twin tunnel on the collapse pattern and maximum ground movement. Since first PFC was calibrated by the experiments, the results obtained were rendered by a uniaxial test. Further, a rectangular ...  Read More

On Propagation Mechanism of Cracks Emanating from Two Neighboring Holes in Cubic Concrete Specimens under Various Lateral Confinements

M. Davood Yavari; H. Haeri; V. Sarfarazi; M. Fatehi Marji; H. A. Lazemi

Volume 12, Issue 4 , October 2021, , Pages 1003-1017

https://doi.org/10.22044/jme.2021.10834.2054

Abstract
  The propagation mechanism of cracks emanating from two holes within the concrete specimens is studied by considering the effects of different lateral compressive stresses. The experimental part of this research work is carried out on some specially prepared pre-cracked specimens with two neighbouring ...  Read More

Effect of Confining Pressure on Is(50) Obtained by Point Load Test

V. Sarfarazi; K. Asgari

Volume 12, Issue 4 , October 2021, , Pages 1019-1028

https://doi.org/10.22044/jme.2021.10918.2070

Abstract
  In this investigation, the impact of confining pressure on the tensile strength obtained by point load test (PLT) is examined by particle flow code in two dimensions. In this regard, at first, a numerical model is calibrated using the Brazilian experimental test results. The tensile strength of the model ...  Read More

Compressive Failure Analyses of Rock-Like Materials by Experimental and Numerical Methods

M. Davood Yavari; H. Haeri; V. Sarfarazi; M. Fatehi Marji; H. A. Lazemi

Volume 12, Issue 3 , July 2021, , Pages 769-783

https://doi.org/10.22044/jme.2021.10819.2052

Abstract
  Investigating the crack propagation mechanism is of paramount importance in analyzing the failure process of most materials. This process may be exposed during each kind of loading on the materials. In this work, the cracking mechanism in rock-like materials is studied using the numerical methods and ...  Read More

Interaction between Tunnel and Surface Foundation using PFC2D

V. Sarfarazi; K. Asgari; Sh. Mohamadi Bolban Abad

Volume 12, Issue 3 , July 2021, , Pages 785-798

https://doi.org/10.22044/jme.2021.10846.2057

Abstract
  In this work, we investigate the interaction between tunnel and surface foundation in two dimensions by the particle flow code. At the first stage, the PFC calibration is conducted using the experimental test results rendered by a biaxial test. Then the simulation of a biaxial test is performed by confining ...  Read More

On Direct Tensile Strength Measuring of Anisotropic Rocks

V. Sarfarazi; H. Haeri; M. Fatehi Marji

Volume 12, Issue 2 , April 2021, , Pages 491-499

https://doi.org/10.22044/jme.2021.10601.2013

Abstract
  The tensile strength of the anisotropic rock-like material specimens is meastred directly in the laboratory using a new device converting the compressive loading to that of the tensile before the rock breakage. The specially prepared concrete slabs of dimensions 19 cm * 15 cm * 15 cm with a central hole ...  Read More

Study of Rock Pillar Failure Consisting of Non-Persistent Joint using Experimental Test and Fracture Analysis Code in Two Dimensions

V. Sarfarazi; H. Karimi Javid; K. Asgari

Volume 12, Issue 1 , January 2021, , Pages 163-179

https://doi.org/10.22044/jme.2020.10266.1968

Abstract
  The experimental and numerical methods were used to investigate the effects of joint number and joint angle on the failure behaviour of rock pillars under a uniaxial compressive test. The gypsum samples with dimensions of 200 mm × 200 mm × 50 mm were prepared. The compressive strength of ...  Read More

Numerical Investigation of Effect of Rock Bolt Angle on Shear Behavior of Rock Bridges

V. Sarfarazi; A. Tabaroei

Volume 11, Issue 4 , October 2020, , Pages 1007-1022

https://doi.org/10.22044/jme.2020.9580.1871

Abstract
  In this work, the effect of rock bolt angle on the shear behavior of Rock Bridges is investigated using the particle flow code in two dimensions (PFC2D) for three different Rock Bridge lengths. Firstly, the calibration of PF2D is performed to reproduce the gypsum sample. Then the numerical models with ...  Read More

Behavior of a Tunnel and its Neighboring Joint with and without Presence of Rock Bolt under Biaxial Loads; Particle Flow Code Approach

V. Sarfarazi

Volume 11, Issue 3 , July 2020, , Pages 855-864

https://doi.org/10.22044/jme.2020.9581.1872

Abstract
  In this work, the interaction between the semi-circular space and the neighboring joint with and without the presence of rock bolts was investigated using the particle flow code (PFC) approach. For this purpose, firstly, the calibration of PFC was performed using both the Brazilian experimental test ...  Read More