The paper deals with the problem of service life evaluation of counterweight bar bolted
connection by means of computational analysis and experimental testing. Computational analysis
has been performed using the local strain-life approach (ε-N), where appropriate material properties
for treated high strength steel S1100Q has been determined previously. Experimental fatigue tests
of bars were carried out in a specially constructed hydraulic pulsation machine. Comparison of
computational and experimental results shows a reasonable agreement.
