Experimental Investigation on the Bond Behavior of FRCM-Concrete Interface via Digital Image Correlation

2021 ◽  
pp. 493-502
Author(s):  
Dario De Domenico ◽  
Antonino Quattrocchi ◽  
Santi Urso ◽  
Damiano Alizzio ◽  
Roberto Montanini ◽  
...  
Keyword(s):  
Experimental Investigation ◽  
Digital Image Correlation ◽  
Digital Image ◽  
Image Correlation ◽  
Bond Behavior ◽  
Concrete Interface

scholarly journals Experimental Characterization of the FRCM-Concrete Interface Bond Behavior Assisted by Digital Image Correlation

Sensors ◽  
2021 ◽  
Vol 21 (4) ◽  
pp. 1154
Author(s):  
Dario De Domenico ◽  
Antonino Quattrocchi ◽  
Damiano Alizzio ◽  
Roberto Montanini ◽  
Santi Urso ◽  
...  
Keyword(s):  
Digital Image Correlation ◽  
Digital Image ◽  
Mechanical Tests ◽  
Image Correlation ◽  
Front Face ◽  
Full Field ◽  
Bond Behavior ◽  
Externally Bonded ◽  
Strengthening Technique ◽  
Concrete Interface

Digital Image Correlation (DIC) provides measurements without disturbing the specimen, which is a major advantage over contact methods. Additionally, DIC techniques provide full-field maps of response quantities like strains and displacements, unlike traditional methods that are limited to a local investigation. In this work, an experimental application of DIC is presented to investigate a problem of relevant interest in the civil engineering field, namely the interface behavior between externally bonded fabric reinforced cementitious mortar (FRCM) sheets and concrete substrate. This represents a widespread strengthening technique of existing reinforced concrete structures, but its effectiveness is strongly related to the bond behavior between composite fabric and underlying concrete. To investigate this phenomenon, a set of notched concrete beams are realized, reinforced with FRCM sheets on the bottom face, subsequently cured in different environmental conditions (humidity and temperature) and finally tested up to failure under three-point bending. Mechanical tests are carried out vis-à-vis DIC measurements using two distinct cameras simultaneously, one focused on the concrete front face and another focused on the FRCM-concrete interface. This experimental setup makes it possible to interpret the mechanical behavior and failure mode of the specimens not only from a traditional macroscopic viewpoint but also under a local perspective concerning the evolution of the strain distribution at the FRCM-concrete interface obtained by DIC in the pre- and postcracking phase.

Experimental investigation of strain errors in stereo-digital image correlation due to camera calibration

2018 ◽  
Vol 57 (03) ◽  
pp. 1 ◽  
Author(s):  
Xinxing Shao ◽  
Feipeng Zhu ◽  
Zhilong Su ◽  
Xiangjun Dai ◽  
Zhenning Chen ◽  
...  
Keyword(s):  
Experimental Investigation ◽  
Digital Image Correlation ◽  
Camera Calibration ◽  
Digital Image ◽  
Image Correlation ◽  
Stereo Digital Image Correlation
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