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A three hinged parabolic arch ABC has a span of 20 m and a central rise of 4 m. The arch has hinges at the ends at the centre. A train of two point loads of 20 kN and 10 kN, 5 m apart, crosses this arch from left to right, with 20 kN load leading. The maximum thrust induced at the supports is
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- 25.00 kN
- 28.13 kN
- 31.25 kN
- 32.
Correct Option: C
Max thrust occurs when 20 kN coal reaches point B.
This is found out by drawing ILD.
Max Thrust = 20 × 1.25 + 10 × 1.25/2
= 31.25 kN
