Simple Correlation to Evaluate Mohr-Coulomb Failure Criterion Using Uniaxial Compressive Strength

Al-Awad, Musaed N.J.

doi:10.1016/s1018-3639(18)30749-9

Cited by 9 publications

(5 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…These layers are (1) the more cohesive (C ∼ 90 Pa) 3 cm thick lower layer of the basement, (2) the noncohesive (C ∼ 0 Pa) 2.5 cm thick upper layer of the basement, and (3) the poorly cohesive (C ∼ 30 Pa) 3–4 cm high cone (Figure 3d). Such a configuration was meant to scale the variations in the uniaxial compressive strength of the rocks constituting the basement of Etna [ Acocella and Puglisi , 2010, and references therein], using a proportional relationship between the uniaxial compressive strength and cohesion [ Al Awad , 2000].…”

Section: Resultsmentioning

confidence: 99%

Analogue modeling of flank instability at Mount Etna: Understanding the driving factors

Norini¹,

Acocella²

2011

J. Geophys. Res.

View full text Add to dashboard Cite

[1] Mount Etna is characterized by significant flank instability, whose triggering factors are still a matter of debate. We use analog models to investigate the role of different factors. In the models, a cone and base of granular material simulate the volcanic edifice and its basement. The asymmetric geometry of the basement simulates the topographic gradient around the volcano. Injections of silicone (sets A and B) and low-viscosity vegetable oil (set C) simulate the pressurization of plutonic complex, deep reservoirs, and the emplacement of dikes, respectively. Other experiments (set D) reproduce regional extensional tectonics in the last 10 5 years, within layers with different cohesion simulating strength differences in the basement. Laser scanner and control points allow the tracking of surface deformation with submillimeter precision. The asymmetric topography enhances flank instability on the side with the weakest confinement (i.e., seaside), providing the preparing factor for instability. In sets A and B, any type of pressurized reservoir enhances, up to 10 times, the amount of flank instability toward the seaside with respect to the other flanks of the volcano. In set C, dike emplacement enhances seaside flank instability up to 8 times. Regional tectonics and crustal layering in set D enhance flank instability up to 2 and 1.3 times, respectively. Considering the duration and frequency of the simulated processes in nature, we propose a semiquantitative evaluation and hierarchy of the factors controlling flank instability at Etna. Magmatic activity (point-like source inflation and dike emplacement) provides the most important triggering factor. Extensional tectonics, in the last 10 5 years, and crustal layering are more than 10 times less effective. This study shows the importance of differential buttressing at the volcano base for flank instability. This condition is an important indication to expect asymmetric activity in any volcano (flank eruptions and deformation).

show abstract

Section: Resultsmentioning

confidence: 99%

Analogue modeling of flank instability at Mount Etna: Understanding the driving factors

Norini¹,

Acocella²

2011

J. Geophys. Res.

View full text Add to dashboard Cite

show abstract

“…In terms of strength reduction ratio (σ cm /σ ci ), the ratio for four rock types is less than 0.2, except for weathered sandstone, which is 0.86. The σ ci and ratio of σ cm /σ ci certainly play an important role in the estimation of rock mass strength (Yavuz, 2006;Al-Awad, 2012).…”

Section: Discussionmentioning

confidence: 99%

Influence of Rock Properties in Estimating Rock Strength for Shallow Underground Structures in Weak Rocks

Agustawijaya¹

2018

Indonesian J. Geosci.

View full text Add to dashboard Cite

Two popular rock strength criteria, the linear Coulomb and non-linear Hoek-Brown, are widely used in underground designs. These two criteria may be applied differently depending on rock conditions. Weak rocks may have different properties compared to hard rocks. Both criteria have been applied in a current research to practically determine the applicability of the criteria in estimating the strength of weak rock masses of five shallow underground structures. Results show that both criteria are able to model the strength of the five weak rock masses, but as expected the criteria provide quite different values for each type of rocks. The strength of rock masses around underground structures depends on uniaxial compressive strength and confinement; but the linear criterion very much depends on shear characteristics of rock materials. Whereas, the non-linear criterion relies on the geological strength index (GSI). Although the GSI may have served practical descriptions for rock masses, some difficulties were found when using the GSI for very weak pyroclastic rocks. The GSI seems to provide underestimated indexes for these rock types. Estimations show that the non-linear criterion may not really exhibit curved strength envelopes rather linear in some sense, for five weak rock masses. Thus in general, when an underground structure is reasonably shallow, has a lack of confinement, and where the shear behaviour dominates rock failures, the linear criterion is more preferable than the non-linear criterion in modelling the strength of weak rock masses.

show abstract

“…where, and are the shears and normal stresses, respectively, is the apparent or inherent cohesion and is the angle of internal friction. The evaluation of the Mohr-Coulomb failure criteria needs to carry out many triaxial tests on rock samples at various con ning pressures [71].…”

Section: Methodsmentioning

confidence: 99%

The Effect of Different Parameters on the Mechanical Properties of Two- Stage Concrete under Triaxial Compression

Moaf,

Rajabi,

Abdelgader

et al. 2024

Preprint

View full text Add to dashboard Cite

This study conducts a comprehensive comparative analysis of the triaxial compressive strength and associated mechanical properties between Two-Stage Concrete (TSC) and Conventional Concrete (CC). Through rigorous using triaxial test methodologies, our research quantitatively delineates TSC's mechanical superiority, promoting its broader application in diverse construction settings. Key findings reveal that TSC, particularly types with finer aggregates, demonstrates superior shear strength, achieving up to 52.4 MPa under dry conditions compared to CC's 48.38 MPa. Furthermore, TSC exhibits remarkable stress tolerance, withstanding up to 82.04 MPa, significantly outperforming CC, which manages only 69.61 MPa under similar conditions. TSC also maintains higher modulus of elasticity and internal friction angles, indicating better deformation behavior and shear resistance. Additionally, TSC shows greater resilience to moisture, suggesting its potential for use in variable moisture environments. These properties highlight TSC’s robustness for high-load applications and its suitability for infrastructure prone to environmental fluctuations. By aligning with existing literature on the benefits of finer aggregate sizes in enhancing concrete's mechanical resistance, this research underscores the strategic advantage of integrating TSC in modern construction practices, emphasizing its enhanced strength, durability, and environmental adaptability.

show abstract

Simple Correlation to Evaluate Mohr-Coulomb Failure Criterion Using Uniaxial Compressive Strength

Cited by 9 publications

References 13 publications

Analogue modeling of flank instability at Mount Etna: Understanding the driving factors

Analogue modeling of flank instability at Mount Etna: Understanding the driving factors

Influence of Rock Properties in Estimating Rock Strength for Shallow Underground Structures in Weak Rocks

The Effect of Different Parameters on the Mechanical Properties of Two- Stage Concrete under Triaxial Compression

Contact Info

Product

Resources

About