Question

A flexible pavement has the following class of loads during a particular hour of the day.

i. 80 buses with 2-axles (each axle load of 40 kN);

ii. 160 trucks with 2-axles (front and rear axle loads of 40 kN and 80 kN, respectively)

The equivalent standard axle load repetitions for this vehicle combination as per IRC:37-2012 would be

• A. 250
• B. 240
• C. 320
• D. 180

Answer 1

The correct option is D 180

$ESAL=80\times {\left(\frac{40}{80}\right)}^4+80\times {\left(\frac{40}{80}\right)}^4+160\times {\left(\frac{40}{80}\right)}^4+160{\left(\frac{80}{80}\right)}^4$
$=5+5+10+160$
$=180$