PDF(2719 KB)
Influence of Compressive Stress State during Measurement Period on Damage Calculation of Concrete Base on Wave Velocity
LIU Heng, YANG Yu, XU Jiahui, ZHOU Qiangbing, KONG Shichao
Acta Metrologica Sinica ›› 2025, Vol. 46 ›› Issue (5) : 716-722.
PDF(2719 KB)
PDF(2719 KB)
Influence of Compressive Stress State during Measurement Period on Damage Calculation of Concrete Base on Wave Velocity
The influence of compressive stress state on ultrasonic velocity and damage calculation of axially compressed concrete columns based on wave velocity during measurement was studied, and a corresponding damage correction calculation method was proposed. Firstly, the influence of compressive stress state on fracture morphology and wave velocity measurement results was analyzed. Secondly, through axial compression tests on the concrete columns, the ultrasonic velocities under different compressive stress states were measured and their influences on the damage calculation results were compared. Finally, a practical damage calculation method that can correct the influence of compressive stress state during measurement was given. The results showed that the wave velocity in the axial compression direction is greatly affected by the compressive stress state during the measurement. The maximum relative error of specimen damage value calculated on the basis of the measured wave velocity under different compressive stress states can reach 66.2 %, and the error can be reduced to 2.6 % by using the correction method.
mechanical metrology / concrete damage / compressive stress / column axial compression test / during measurement / ultrasonic wave velocity
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