Nondestructive Investigation of Stress-Induced Damage in Concrete
Figure 5
Stress memory effect in surface wave velocity measurements: (a) AE test results and (b) surface wave velocities measured during load cycles 2 to 9. The second axs in both (a) and (b) indicate the level of loading in KN and as a percentage of the final load at failure, respectively. The results of the first load cycle are not included in these illustrations.
