The deviation of this curve is larger Pazopanib FGFR than the other curves. Thus, it is clear to see that its relativity is good. Therefore, these test results can confirm the accuracy of the digital image technique and analyzing program.Figure 7The images are taken apart for analyzing the object deformation and movement.Figure 8Displacement curve.Figure 9Normalized displacement curve.4.2. Dynamic Test and Structural Damage EvaluationIn order to assess the structural damage for using continuous parameters to improve DIC techniques, this reducedscale cantilever beam needs to fabricate defects with various dimensions and locations to investigate the practicability of DIC for using continuous parameters to monitor dynamic response of these test samples.
Figure 10 shows that the time history of displacement response at the end, 3/4 length, 1/2 length, and 1/4 length of test specimen under excitation of Kobe earthquake is recorded, respectively. Then, the selected vibration modes of serial numbers CB-00-00-00, CB-20-10-00, CB-20-10-05, and CB-20-10-10 are shown in Figure 11, respectively, indicating that the vibration mode can easily reflect the location of structural damage. Nevertheless, these vibration modes cannot show the damage situation of these test specimens. Therefore, the sensitivity of Inter-Story Drift Mode Shape, IDMS, is used to evaluate the damage conditions of structure. The analysis results are shown in Figure 12. This figure indicates that this continuous parameter method to improve DIC techniques can easily reflect the damage locations and structural damage conditions.
Figure 10The time history of displacement response of test specimen under excitation of Kobe earthquake at top, 3/4L, 1/2L, and 1/4L.Figure 11The remarkable vibration mode of various test specimens.Figure 12The analysis results of IDMS for various test specimens.5. Conclusions In order to investigate the practicability of using the continuous parameter to improve the DIC method to detect dynamic response of structural damage under the excitation of external force, reducedscale cantilever beams without defect and with various defects are evaluated for external earthquake force by monitoring of dynamic response with device Cilengitide of Camel NexShot 2C-2.1M. The analysis results are summarized as follows.The time history of displacement curves for free-vibration experiment, passed through normalization, shows that these normalized curves are tallied with each other and the data recorded from accelerometers approximately. These tests’ results demonstrate that the conformability of this digital image technique and analyzing program, proposed in this study, is very good.