TY - JOUR
T1 - Numerical investigation of box shape effects on soil direct shear test
AU - Dastgerdi, Rashid Hajivand
AU - Khan, Arif
AU - Kazemi, Kamran
AU - Kowalski, Michal
AU - Balkaya, Müge
AU - Malinowska, Agnieszka
N1 - Publisher Copyright:
© 2024 The Authors.
PY - 2024
Y1 - 2024
N2 - Summary The direct shear test is a fundamental method in geotechnical engineering, that provides crucial soil shear strength parameters, including cohesion (c) and the internal friction angle (φ). These parameters play a pivotal role in structural design, slope stability assessment, and soil stability evaluation. However, achieving a uniform normal stress distribution within the shear box remains a challenging task, which can result in inaccuracies in test results. This study investigates the impact of shear box shape, specifically comparing circular and square configurations, on the outcomes of the direct shear test. The findings reveal that the choice of lower or upper box movement has a minimal effect on test results. Moreover, circular boxes demonstrate superior normal stress distribution, leading to reduced variations in comparison to square boxes. Wall friction effects lead to lower shear capacity measurements, with circular boxes yielding higher shear levels when contrasted with square boxes. Additionally, the soil along the sides and corners of the specimen experiences diminished shear stress due to reduced normal stress. This research contributes significantly to our comprehension of how shear box shape influences the determination of shear strength parameters in direct shear tests, ultimately enhancing the reliability of geotechnical engineering assessments.
AB - Summary The direct shear test is a fundamental method in geotechnical engineering, that provides crucial soil shear strength parameters, including cohesion (c) and the internal friction angle (φ). These parameters play a pivotal role in structural design, slope stability assessment, and soil stability evaluation. However, achieving a uniform normal stress distribution within the shear box remains a challenging task, which can result in inaccuracies in test results. This study investigates the impact of shear box shape, specifically comparing circular and square configurations, on the outcomes of the direct shear test. The findings reveal that the choice of lower or upper box movement has a minimal effect on test results. Moreover, circular boxes demonstrate superior normal stress distribution, leading to reduced variations in comparison to square boxes. Wall friction effects lead to lower shear capacity measurements, with circular boxes yielding higher shear levels when contrasted with square boxes. Additionally, the soil along the sides and corners of the specimen experiences diminished shear stress due to reduced normal stress. This research contributes significantly to our comprehension of how shear box shape influences the determination of shear strength parameters in direct shear tests, ultimately enhancing the reliability of geotechnical engineering assessments.
KW - box shape
KW - direct shear test
KW - finite element modeling
KW - normal stress distribution
KW - shear strength parameters
UR - http://www.scopus.com/inward/record.url?scp=85201470002&partnerID=8YFLogxK
U2 - 10.23998/rm.142264
DO - 10.23998/rm.142264
M3 - Article
AN - SCOPUS:85201470002
SN - 0783-6104
VL - 57
SP - 65
EP - 75
JO - Rakenteiden Mekaniikka
JF - Rakenteiden Mekaniikka
IS - 2
ER -