Effect of opening on the shear behavior of granular materials in direct shear test

2012 ◽  
Vol 16 (7) ◽  
pp. 1132-1142 ◽  
Author(s):  
Byeong-Su Kim ◽  
Satoru Shibuya ◽  
Seong-Wan Park ◽  
Shoji Kato
Keyword(s):  
Granular Materials ◽  
Direct Shear Test ◽  
Shear Test ◽  
Shear Behavior ◽  
Direct Shear

scholarly journals Shear Behavior of Sands Depending on Shear Box Type in Direct Shear Test

2015 ◽  
Vol 31 (3) ◽  
pp. 51-62
Author(s):  
Young-Ho Hong ◽  
Yong-Hoon Byun ◽  
Jong-Gil Chae ◽  
Jong-Sub Lee
Keyword(s):  
Direct Shear Test ◽  
Shear Test ◽  
Shear Behavior ◽  
Direct Shear ◽  
Shear Box

Particle Flow Simulation of Direct Shear Test of Rock Discontinuities

2014 ◽  
Vol 1065-1069 ◽  
pp. 159-163
Author(s):  
Lei Xu ◽  
Qing Wen Ren
Keyword(s):  
Direct Shear Test ◽  
Shear Test ◽  
Shear Behavior ◽  
Test Method ◽  
Particle Flow ◽  
Inversion Method ◽  
Particle Swarm Algorithm ◽  
Direct Shear ◽  
Physical Test ◽  
Rock Discontinuities

The stability of rock masses is controlled by the shear behavior of rock discontinuities, and it is hard to investigate the shear behavior of rock discontinuities at micro-scale by using traditional physical test method. With this in mind, Particle Flow Code is used to simulate the direct shear test of rock discontinuities. The PFC model of rock discontinuities is established firstly, and its micro-properties are inversed by using the proposed optimization inversion method based on the asynchronous particle swarm algorithm. Then, the PFC simulation of shear behavior of rock discontinuities is performed. The simulation results show that the number of microcracks gradually increases with the increasement of shear displacement, and the accumulated microcracks result in the shear failure of rock discontinuities.

Discrete modelling results of a direct shear test for granular materials versus FE results

2013 ◽  
Vol 15 (5) ◽  
pp. 607-627 ◽  
Author(s):  
J. Kozicki ◽  
M. Niedostatkiewicz ◽  
J. Tejchman ◽  
H.-B. Muhlhaus
Keyword(s):  
Granular Materials ◽  
Direct Shear Test ◽  
Shear Test ◽  
Direct Shear ◽  
Discrete Modelling

A Study on Shear Strength of the Perfobond Rib Shear Connector for Composite Beam

2015 ◽  
Vol 764-765 ◽  
pp. 1026-1030
Author(s):  
Doo Yong Cho ◽  
Jin Woong Choi ◽  
Sun Kyu Park
Keyword(s):  
Shear Stress ◽  
Direct Shear Test ◽  
Shear Test ◽  
Shear Resistance ◽  
Shear Behavior ◽  
Shear Connector ◽  
Direct Shear ◽  
Mechanical Behaviors ◽  
Shear Connectors ◽  
Main Factors

For safe and efficient use of the Perfobond Rib shear connector, it is essential to investigate mechanical behaviors and evaluate performance of shear resistance. When the Perforbond Rib shear connectors are to be used for a structure, they show flexural-shear behavior due to external force rather than direct shear behavior. Therefore, this study performed a direct shear test and proposed the equation for the shear resistance assessment. Also, a flexural shear test was conducted. Through the direct shear test, main factors that affect directly shear resistance were found. The flexural shear stress and the direct shear stress were calculated and it is revealed that the flexural shear stress is approximately 6% stronger than the direct shear stress.

scholarly journals Influence of Structural Plane Microscopic Parameters on Direct Shear Strength

2018 ◽  
Vol 2018 ◽  
pp. 1-7 ◽  
Author(s):  
Yanhui Cheng ◽  
Weijun Yang ◽  
Dongliang He
Keyword(s):  
Particle Size ◽  
Shear Strength ◽  
Internal Friction ◽  
Direct Shear Test ◽  
Shear Test ◽  
Friction Angle ◽  
Internal Friction Angle ◽  
Direct Shear ◽  
Stiffness Ratio ◽  
Structural Plane

Structural plane is a key factor in controlling the stability of rock mass engineering. To study the influence of structural plane microscopic parameters on direct shear strength, this paper established the direct shear mechanical model of the structural plane by using the discrete element code PFC2D. From the mesoscopic perspective, the research on the direct shear test for structural plane has been conducted. The bonding strength and friction coefficient of the structural plane are investigated, and the effect of mesoscopic parameters on the shear mechanical behavior of the structural plane has been analyzed. The results show that the internal friction angle φ of the structural plane decreases with the increase of particle contact stiffness ratio. However, the change range of cohesion is small. The internal friction angle decreases first and then increases with the increase of parallel bond stiffness ratio. The influence of particle contact modulus EC on cohesion c is relatively small. The internal friction angle obtained by the direct shear test is larger than that obtained by the triaxial compression test. Parallel bond elastic modulus has a stronger impact on friction angle φ than that on cohesion c. Under the same normal stress conditions, the shear strength of the specimens increases with particle size. The shear strength of the specimen gradually decreases with the increase of the particle size ratio.

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