Example Question

The concrete beam above is reforced with 3 steel cables with a diameter of 30 mm. Find the maximum bending stress σ_max developed in the concrete and steel.

Click below to show answer. X

Step 1:
Transform steel into concrete and remove concrete taking tension

Step 1:
Transform steel into concrete and remove concrete taking tension

Reinforced Concrete Beams solution step 1

Step 2:
Calculate section properties (h', I)

Step 2:
Calculate section properties (h', I)

Reinforced Concrete Beams solution step 2

Step 3:
Calculate σ_b,max for concrete and steel

Step 3:
Calculate σ_b,max for concrete and steel

Reinforced Concrete Beams solution step 3

Useful formula:

Useful formula:

Now that you've mastered this question, you can try Question 1.

Example Question

Example Question

Step 1: Transform steel into concrete and remove concrete taking tension Step 1: Transform steel into concrete and remove concrete taking tension

Step 2: Calculate section properties (h', I) Step 2: Calculate section properties (h', I)

Step 3: Calculate σb,max for concrete and steel Step 3: Calculate σb,max for concrete and steel

Useful formula: Useful formula:

Step 1:
Transform steel into concrete and remove concrete taking tension

Step 1:
Transform steel into concrete and remove concrete taking tension

Step 2:
Calculate section properties (h', I)

Step 2:
Calculate section properties (h', I)

Step 3:
Calculate σ_b,max for concrete and steel

Step 3:
Calculate σ_b,max for concrete and steel

Useful formula:

Useful formula: