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Barton-Bandis Rock Joint Shear Strength (JRC & JCS) Criterion Calculator

Easily calculate and compute barton-bandis rock joint shear strength (jrc & jcs) criterion calculator with accurate equations, live formulas, and expert guidance.

Effective normal stress perpendicular to discontinuity.

Surface roughness (0 = smooth planar; 20 = rough stepped).

Schmidt rebound hammer compressive strength of joint walls.

Smooth flat planar friction angle (typically 28° to 35°).

Calculated Result
0.92 MPa

Shear Strength (τ)

Shear Strength (τ)

0.92 MPa

Peak Shear Strength Tau Mpa

0.92

Roughness Dilation Angle Degrees

19.1

Total Apparent Friction Angle Degrees

49.1

Asperity Shear Observation

Low normal stress: Prominent dilation and asperity ride-over

0.92 — MPa

Calculation Breakdown

  1. Applied FormulaCalculates the non-linear peak shear strength (τ) and roughness dilation angle along rough unweathered rock joints using the empirical Barton-Bandis criterion.\tau = \sigma_n \tan\left[\text{JRC} \log_{10}\left(\frac{\text{JCS}}{\sigma_n}\right) + \phi_b\right]

Barton-Bandis Joint Shear Metric Output

Interactive visualization based on your current inputs

Calculated Value
0.00.30.50.81.0Shear Strength (τ)

What Is the Barton-Bandis Rock Joint Shear Strength (JRC & JCS) Criterion Calculator?

This tool computes barton-bandis rock joint shear strength (jrc & jcs) criterion calculator with high precision arithmetic.

How Does the Barton-Bandis Rock Joint Shear Strength (JRC & JCS) Criterion Calculator Work?

Calculates the non-linear peak shear strength (τ) and roughness dilation angle along rough unweathered rock joints using the empirical Barton-Bandis criterion.

Barton-Bandis Rock Joint Shear Strength (JRC & JCS) Criterion Calculator Formula & Variables

The core mathematical equation utilized by this calculator is expressed as:

τ=σntan⁡[JRClog⁡10(JCSσn)+ϕb]\tau = \sigma_n \tan\left[\text{JRC} \log_{10}\left(\frac{\text{JCS}}{\sigma_n}\right) + \phi_b\right]

Calculates the non-linear peak shear strength (τ) and roughness dilation angle along rough unweathered rock joints using the empirical Barton-Bandis criterion.

How to Use the Barton-Bandis Rock Joint Shear Strength (JRC & JCS) Criterion Calculator

  1. Enter your parameters into the designated input fields to calculate the result immediately.

Step-by-Step Example Calculation

Barton-Bandis Rock Joint Shear Strength (JRC & JCS) Criterion Calculator Example

Input Values:

normalStressSigmaNMpa:0.8
jointRoughnessCoefficientJrc:10
jointWallCompressiveStrengthJcsMpa:65
basicFrictionAnglePhiBDeg:30
Worked Steps: Sample evaluation based on standard reference conditions.

Understanding Your Result

The calculated primary figure indicates the optimal or required MPa.

Factors That Affect the Result

  • Measurement tolerances, operational variance, and real-world conditions.

When Should You Use This Calculator?

  • Everyday budgeting, technical homework, professional estimation, and household projects.

Assumptions & Limitations

  • Assumes standard atmospheric or environmental parameters unless specified.

Frequently Asked Questions

Calculation Accuracy & Reference Note

Double-precision IEEE 754 arithmetic with validated empirical constants.

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