FATIGUE TESTS ON SMALL REINFORCED PRE-STRESSED CONCRETE BEAMS

ESSAIS DE FATIGUE SUR DES POUTRELLES EN BETON ARME PRECONTRAINT

TO APPLY REPETITIVE FLEXURAL LOADS AT THE RATE OF 250 CYCLES PER MINUTE AND FOR 2 MILLION CYCLES TO SMALL REINFORCED AND PRE-STRESSED CONCRETE BEAMS (TWO LEVELS OF PRESTRESSING), STATIC LOADS WILL THEN BE APPLIED UP TO FAILURE POINT. THE FOLLOWING WILL BE MEASURED AT SUITABLE INTERVALS DURING THE TESTS: DEFORMATION OF THE ACTIVE AND PASSIVE REINFORCEMENT, DEFORMATION OF THE CONCRETE, AMOUNT OF DEFLECTION AND THE WIDTH OF CRACKS.