Moving Loads

Problem 457
A truck and trailer combination crossing a 12-m span has axle loads of 10, 20, and 30 kN separated respectively by distances of 3 and 5 m. Compute the maximum moment and maximum shear developed in the span.
 

Problem 456
Three wheel loads roll as a unit across a 44-ft span. The loads are P₁ = 4000 lb and P₂ = 8000 lb separated by 9 ft, and P₃ = 6000 lb at 18 ft from P₂. Determine the maximum moment and maximum shear in the simply supported span.
 

Problem 455
A tractor weighing 3000 lb, with a wheel base of 9 ft, carries 1800 lb of its load on the rear wheels. Compute the maximum moment and maximum shear when crossing a 14 ft-span.
 

Problem 454
Repeat Prob. 453 using axle loads of 30 kN and 50 kN on a wheel base of 4 m crossing an 8-m span.
 

Problem 453
A truck with axle loads of 40 kN and 60 kN on a wheel base of 5 m rolls across a 10-m span. Compute the maximum bending moment and the maximum shearing force.