Monotonic tensile behavior and hysteretic behavior of Q690E steel plate with corrosion damage
To investigate the influences of the corrosion damage on the monotonic tensile and hysteretic behavior of Q690E steel plate,artificially accelerated corrosion test was conducted to obtain the corroded specimens.Then coupon test and the uniaxially cyclic loading test were performed on the specimens with different corrosion degrees.Based on the tensile tests,the nominal yield stress,nominal tensile strength,yield-to-strength ratio and the final elongation of each specimen were captured and the regression relationships between these parameters and corrosion degree were determined.According to the cyclic tests,the effects of the corrosion damage on the stress-strain hysteretic curves,low cycle fatigue life,cyclic softening and energy dissipation were analyzed.The experimental results reveal that the tensile properties of Q690E steel plate decrease linearly with the increase of corrosion damage degree,and the degradation of the deformability is higher than that of strength.Besides,the deterioration of high strength steel induced by corrosion damage is severer than that of the low carbon steel.In terms of the hysteretic performance,corrosion damage would cause reduction of the fatigue life and the degradation and pinching of the hysteretic curves under constant-amplitude loading.Furthermore,corrosion damage would not affect the stable cyclic softening degree in steady softening stage but would influence the softening rate.Under increasing-amplitude loading,as the corrosion degree increases,the ultimate strength decreases and the energy dissipation capacity first increases then decreases.
high strength steel platecorrosion damagestrengthdeformabilityhysteretic behaviorcyclic softening
国家科技期刊平台
NSTL
万方数据
维普
