Tensile failure of high-tensile steel re-bar


    High tensile steel reinforcement bar
    12 mm diameter x 460 mm length
    79 kN
    23 mm

Produced with funding from CONSTRUCT and filmed at Imperial College London.

This film shows the behaviour of a high-tensile steel reinforcing bar in tension. This sample is typical of the steel reinforcement found in reinforced concrete elements (beams, columns, slabs, etc.)

The sample in this test is held between two jaws. The testing apparatus pulls the upper jaw upwards, causing the sample to stretch until it breaks.

Reinforcing steel is included in reinforced concrete elements to give these elements tensile strength.

At the end of the video a graph of vertical load versus vertical deflection shows how high-tensile steel behaves under tension.

The tensile behaviour of a high-tensile steel bar should be compared with the the tensile behaviour of a mild steel bar (see the video ‘Reinforcement (mild steel) – tensile failure’.

The tensile behaviour of steel should ales be compared with the tensile strength of concrete (see the video ‘Brazilian test – tensile failure of concrete’).

Reinforcing steel helps reinforced concrete elements, such as beams, resist forces that cause these elements to bend. To find out more see the series of videos in this section about simply supported beams.

Download Data for this Test

Download the datasheet for this demonstration: