Analysis of the Crack Propagation Process in Concrete Beams Reinforced with BFRP Bars Using Digital Image Correlation Method

2015 ◽  
Vol 240 ◽  
pp. 55-60 ◽  
Author(s):  
Marek Urbański ◽  
Andrzej Łapko ◽  
Karol Suprynowicz
Keyword(s):  
Digital Image Correlation ◽  
Crack Propagation ◽  
Digital Image ◽  
Concrete Beams ◽  
Limit State ◽  
Correlation Method ◽  
Reinforced Concrete Beams ◽  
Image Correlation ◽  
Rc Beams ◽  
Digital Image Correlation Method

Application of the DIC (Digital Image Correlation) method for the analysis of crack initiation and propagation in RC beams reinforced by BFRP bars (Basalt Fibre Reinforced Polymer) is presented in the paper. Two dimensional, single camera DIC system was used to observe strain and crack distribution in such RC beams loaded using four point bending setup. BFRP bars have arose as an alternative to steel bars for RC (Reinforcement Concrete) members in aggressive environments. The low modulus of elasticity of BFRP bars lead on to large crack widths and, as a result, the design of BFRP Reinforced Concrete beams is often governed by SLS (Serviceability Limit State) criterion. Due to this it is necessary to explore specific crack propagation in concrete beams. Process of such beams degradation can be identified by comparison of strains and displacements obtained by DIC method, with the database of experiment results.

Research on the Surface Deformability of Reinforced Concrete Beams with the Use of Digital Image Correlation Method

2015 ◽  
Vol 240 ◽  
pp. 25-30
Author(s):  
Rafal Ostromecki ◽  
Karol Suprynowicz
Keyword(s):  
Reinforced Concrete ◽  
Digital Image Correlation ◽  
Digital Image ◽  
Strain Distribution ◽  
Concrete Beams ◽  
Concrete Structures ◽  
Correlation Method ◽  
Reinforced Concrete Beams ◽  
Image Correlation ◽  
Digital Image Correlation Method

The results of experimental research on a single span reinforced concrete beams are presented in the paper. The study was undertaken to explain some issues, amongst which the most important one was the recognition of strain distribution in the shear zone of RC beams. It was decided to adopt the modified Digital Image Correlation Method (DIC) and the software created by K. Suprynowicz to follow the surface deformations. This was the first application of the software to the concrete structures behaviour analysis. Hence, another aim of the study was to confirm the proper susceptibility and usefulness of this tool for further research on concrete elements. What’s more the scope of the software future development was defined, that would allow for observation of some particular phenomena characteristic for concrete, like cracking. Finally, the conclusion is presented, that application of the proposed variant of DIC method to concrete structures is promising, although for the recognition of shear strain distribution it requires increasing the accuracy by increasing spatial resolution of images and modifications of the software.

Evaluation of Interlaminar Damage and Crack Propagation through Digital Image Correlation Method

2008 ◽  
Vol 399 ◽  
pp. 105-112
Author(s):  
Dan Mihai Constantinescu ◽  
Marin Sandu ◽  
Liviu Marsavina ◽  
Radu Negru ◽  
Matei Constantin Miron ◽  
...  
Keyword(s):  
Digital Image Correlation ◽  
Crack Propagation ◽  
Digital Image ◽  
Crack Tip ◽  
Correlation Method ◽  
Image Correlation ◽  
Crack Tip Opening Displacement ◽  
Opening Displacement ◽  
Unstable Crack ◽  
Digital Image Correlation Method

Interface damage characterization and interlaminar failure of sandwich specimens with two initial interlaminar defects (inserts) is done by using the digital image correlation method. Mode I tests reveal interesting particularities on damage localization and unstable crack propagation. After analyzing the experimentally obtained results, we propose as a failure parameter the local strain at the crack tip or, alternatively, the crack tip opening displacement which quantifies the non-linear phenomena.

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