Example 03: Compressive Force at the Section of Concrete T-Beam

Problem
The following are the dimensions of a concrete T-beam section

Width of flange, bf = 600 mm
Thickness of flange, tf = 80 mm
Width of web, bw = 300 mm
Effective depth, d = 500 mm

The beam is reinforced with 3-32 mm diameter bars in tension and is carrying a moment of 100 kN·m. Find the total compressive force in the concrete. Use n = 9.
 

wsd-example-03-strength-of-t-beam.jpg

 

Example 01: Total Compression Force at the Section of Concrete Beam

Problem
A rectangular reinforced concrete beam with width of 250 mm and effective depth of 500 mm is subjected to 150 kN·m bending moment. The beam is reinforced with 4 – 25 mm ø bars. Use alternate design method and modular ratio n = 9.

  1. What is the maximum stress of concrete?
  2. What is the maximum stress of steel?
  3. What is the total compressive force in concrete?

 

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