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Related Concept Videos

Shearing Stress01:19

Shearing Stress

819
Shearing stress, denoted by the Greek letter tau (τ), is stress caused by forces acting transversely on an object. These forces create internal ones within the entity in the plane where the external forces are applied. The resultant of these internal forces is the shear in the section.
The average shearing stress can be calculated by dividing the shear by the area of the cross-section.
819
Shearing Strain01:20

Shearing Strain

582
The shearing strain represents a cubic element's angular change when subjected to shearing stress. This type of stress can transform a cube into an oblique parallelepiped without influencing normal strains. The cubic element experiences a significant transformation when exposed solely to shearing stress. Its shape alters from a perfect cube into a rhomboid, clearly demonstrating the effect of shearing strain. The degree of this strain is considered positive if it reduces the angle between...
582
Elastic Strain Energy for Shearing Stresses01:20

Elastic Strain Energy for Shearing Stresses

264
As discussed in previous lessons, strain energy in a material is the energy stored when it is elastically deformed, a concept crucial in materials science and mechanical engineering. This energy results from the internal work done against the cohesive forces within the material. When a material undergoes shearing stress and corresponding shearing strain, the strain energy density, which is the energy stored per unit volume, is calculated. Within the elastic limit, where the stress is...
264
Shear and Bending Moment Diagram: Problem Solving01:24

Shear and Bending Moment Diagram: Problem Solving

1.8K
When analyzing a beam supporting concentrated loads and a distributed load, drawing the shear and bending moment diagrams is essential. These diagrams help understand the internal forces and moments acting on the beam, which is crucial for designing safe and efficient structures. Follow these steps to create the shear and bending moment diagrams:
Draw a Free-Body Diagram: Start by drawing a free-body diagram of the entire beam, including the concentrated loads, distributed load, and reaction...
1.8K
Shearing Stresses in a Beam: Problem Solving01:14

Shearing Stresses in a Beam: Problem Solving

284
A cantilever beam with a rectangular cross-section under distributed and point loads experiences shearing stresses. The analysis begins by identifying the loads acting on the beam. Then, the reactions at the beam's fixed end are calculated using equilibrium equations. The vertical reaction is a combination of the distributed and point loads, while the moment reaction is the sum of their moments. The shear force distribution along the beam, resulting from these loads, is established by...
284
Shear on the Horizontal Face of a Beam Element01:16

Shear on the Horizontal Face of a Beam Element

276
To understand shear on the flat side of a prismatic beam element, consider the vertical and horizontal shearing forces, and the normal forces, acting on the element. The element's upper (U) and lower (L) sections, which are divided by the beam's neutral axis, are examined. The equilibrium of these forces is determined by applying the equilibrium equation, which helps identify the horizontal shearing force. This force is directly related to the bending moments and the cross-section's...
276

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Surrogate Model Development for Digital Experiments in Welding
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Shear Strength Prediction Model for RC Exterior Joints Using Gene Expression Programming.

Moiz Tariq1, Azam Khan1, Asad Ullah1

  • 1NUST Institute of Civil Engineering (NICE), Sector H-12, Islamabad 44000, Pakistan.

Materials (Basel, Switzerland)
|October 27, 2022
PubMed
Summary

Gene expression programming (GEP) models accurately predict reinforced concrete (RC) exterior joint shear strength. The models, developed using 253 experimental tests, offer practical applications for both reinforced and unreinforced joints.

Keywords:
exterior jointgene expression programming (GEP)reinforce concreteshear strength

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Area of Science:

  • Structural Engineering
  • Computational Intelligence
  • Materials Science

Background:

  • Estimating shear strength in reinforced concrete (RC) exterior joints is crucial for structural safety.
  • Existing models often overlook key material and geometric factors influencing joint behavior.
  • Gene expression programming (GEP) offers a data-driven approach for complex structural predictions.

Purpose of the Study:

  • To develop accurate predictive models for RC exterior joint shear strength using GEP.
  • To create distinct models for joints with and without shear reinforcement.
  • To incorporate a comprehensive set of material and geometric parameters into the models.

Main Methods:

  • Utilized gene expression programming (GEP) for model development.
  • Compiled a database of 253 experimental tests from existing literature.
  • Separated the database into 152 reinforced and 101 unreinforced joint specimens.
  • Included factors such as beam/column dimensions, material properties, reinforcement details, and axial loads.

Main Results:

  • Developed two highly accurate GEP-based models for predicting shear strength in RC exterior joints.
  • The models demonstrated superior accuracy compared to existing analytical and empirical models.
  • Successfully integrated various material and geometric factors, enhancing predictive capabilities.

Conclusions:

  • The proposed GEP models provide a reliable and accurate method for estimating RC exterior joint shear strength.
  • These models are suitable for practical engineering applications, improving the design and safety of structures.
  • The study highlights the effectiveness of GEP in capturing complex structural behavior.