A New Testing Method for Fatigue of Reinforced Concrete Beam

摘要

In this research, a new testing method for fatigue is proposed. The traditional hydraulic machine is replaced by vibrating motors with identical magnitude but higher frequency (12 Hz and 30 Hz) of cyclic loading on the basis of force control. The test results (including midspan deflection and beam stiffness) for both fatigue testing systems are compared. By comparison, preloading for the beam at first cycle and adjustment in frequency of loading are suggested to eliminate the dynamic effects for the vibrating motor system. Under such condition, the time it would take for the fatigue testing could be reduced substantially.