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Related Concept Videos

Design of Columns under a Centric Load01:17

Design of Columns under a Centric Load

117
The design of columns under centric load is a fundamental aspect of structural engineering and is critical for ensuring the stability and integrity of structures. Euler's and Secant's formulas are central to understanding and calculating the critical load and deformation behaviors of columns, providing a basis for safe and effective structural design.
Euler's formula is applicable under the assumption that the column is a perfect, straight, homogenous prism, and it is operating...
117
Design of Columns under an Eccentric Load01:21

Design of Columns under an Eccentric Load

519
Designing columns to withstand eccentric loads is a critical aspect of structural engineering, ensuring structures can support off-center loads without failure. This design process must account for the additional normal stresses introduced by eccentric loading, which can significantly influence a column's stress distribution and overall stability. An eccentric load applied to a column induces normal stresses that can be conceptualized as a combination of stresses due to an equivalent...
519
Behavior of Concrete Under Compressive Load01:23

Behavior of Concrete Under Compressive Load

161
Concrete exhibits specific behaviors under different compressive loads. Understanding this is crucial for understanding its structural integrity. When concrete undergoes uniaxial compression, it tends to develop cracks that run parallel to the direction of the force. These parallel cracks stem from localized tensile stresses that occur perpendicular to the compression direction. Additionally, angled cracks may appear due to the formation of shear planes.
As the concrete specimen fractures under...
161
Euler's Formula to Columns with Other End Conditions01:15

Euler's Formula to Columns with Other End Conditions

510
Euler's formula is very important in the field of structural engineering, providing a foundation for understanding the critical loading conditions of pin-ended columns. This formula links the modulus of elasticity, the moment of inertia of the cross-section, and the column's length, offering a precise calculation of the critical load at which a column is prone to buckling.
510
Stresses under Combined Loadings01:23

Stresses under Combined Loadings

153
When analyzing a bent tube with a circular cross-section subjected to multiple forces, it is crucial to determine the stress distribution in order to maintain structural integrity under varied load conditions.
The process begins by slicing the tube at critical points and analyzing the internal forces and stress components at these sections, focusing on the centroid. Normal stresses, generated by axial forces and bending moments, are either compressive or tensile and vary across the section from...
153
Euler's Formula for Pin-Ended Columns01:21

Euler's Formula for Pin-Ended Columns

308
In structural engineering, the stability of columns under compressive axial loads is a critical consideration, described as buckling. A typical example involves a column PQ, which is pin-connected at both ends and subjected to a centric axial load F applied at one end, with a reaction force of F' = -F at the other end. Here, it is crucial to understand that when an applied load exceeds the critical load, buckling occurs as the system becomes unstable.
To calculate the critical load,...
308

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Related Experiment Video

Updated: Jun 29, 2025

Preparation of Aligned Steel Fiber Reinforced Cementitious Composite and Its Flexural Behavior
11:07

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Axial compression tests on CFRP strengthened CFS plain angle short columns.

K S Vivek1, Mohammad Adil Dar2, M I Ali1

  • 1Department of Civil Engineering, Vasireddy Venkatadri Institute of Technology, Guntur, 522508, AP, India.

Scientific Reports
|March 28, 2024
PubMed
Summary
This summary is machine-generated.

Carbon Fiber Reinforced Polymer (CFRP) strengthening significantly enhances the axial strength and stability of cold-formed steel (CFS) columns. Configurations like uni-directional CFRP wraps, especially with cardboard infill, dramatically increase load-bearing capacity and prevent buckling.

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Area of Science:

  • Structural Engineering
  • Materials Science
  • Civil Engineering

Background:

  • Cold-formed steel (CFS) columns are susceptible to buckling under axial compression.
  • Strengthening techniques are crucial for improving the performance of CFS structures.

Purpose of the Study:

  • To experimentally investigate the impact of Carbon Fiber Reinforced Polymer (CFRP) strengthening on the axial strength and stability of CFS plain angle short columns.
  • To evaluate different CFRP strengthening configurations, including fiber orientation and layering.

Main Methods:

  • Testing of 28 CFS plain angle short column specimens under monotonic axial compression.
  • Application of uni-directional (CF_UD) and bi-directional (CF_BD) CFRP strengthening with varying configurations and layers.
  • Inclusion of cardboard infill in some specimens.

Main Results:

  • CF_UD-0° strengthening increased axial capacity by up to 58.33% for single layers.
  • Double layers of CFRP, particularly CF_UD-0°/BD, further enhanced capacity.
  • Cardboard infill combined with CF_UD-0° wrap prevented torsional buckling and boosted capacity by up to 240.61%.

Conclusions:

  • CFRP strengthening is an effective method to improve the axial strength and stability of CFS columns.
  • The configuration, fiber orientation, and layering of CFRP significantly influence performance.
  • Cardboard infill offers substantial benefits in preventing buckling and increasing load capacity.