A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Damage Evaluation of Concrete Under Cyclic Loading by Crack Observation
Abstract Microcracks inside concrete have close relations with the mechanical properties and the durability of concrete. The purpose of this study is to investigate the relationship between the mechanical properties of damaged concrete and the cracks with the width of several micro meter. This study proposes a quantitative evaluation method for damage of concrete through the crack observation using a microscope. In this proposed method, the density of cracks is evaluated based on the number of cracks and the traverse length in a similar way with the linear traverse method for the air-void system. Several damaged concrete specimens were prepared with uniaxial cyclic compression loading. The compressive stress ratios and the number of loading cycles were varied as the experimental parameters. The experimental results showed that the number of cracks increased with the increase of the compressive stress ratios and the number of loading cycles. The increase of micro cracks showed good agreement with the decrease of ultrasonic pulse velocity. In addition, the density of cracks have a direct correlation with the modulus of static elasticity, the consumed energy, and the residual strain of the damaged concrete. Finally, this study suggests a possibility to estimate the mechanical properties of the damaged concrete through the crack observation.
Damage Evaluation of Concrete Under Cyclic Loading by Crack Observation
Abstract Microcracks inside concrete have close relations with the mechanical properties and the durability of concrete. The purpose of this study is to investigate the relationship between the mechanical properties of damaged concrete and the cracks with the width of several micro meter. This study proposes a quantitative evaluation method for damage of concrete through the crack observation using a microscope. In this proposed method, the density of cracks is evaluated based on the number of cracks and the traverse length in a similar way with the linear traverse method for the air-void system. Several damaged concrete specimens were prepared with uniaxial cyclic compression loading. The compressive stress ratios and the number of loading cycles were varied as the experimental parameters. The experimental results showed that the number of cracks increased with the increase of the compressive stress ratios and the number of loading cycles. The increase of micro cracks showed good agreement with the decrease of ultrasonic pulse velocity. In addition, the density of cracks have a direct correlation with the modulus of static elasticity, the consumed energy, and the residual strain of the damaged concrete. Finally, this study suggests a possibility to estimate the mechanical properties of the damaged concrete through the crack observation.
Damage Evaluation of Concrete Under Cyclic Loading by Crack Observation
Nakamura, Takuro (author) / Taniguchi, Madoka (author)
2017-08-06
8 pages
Article/Chapter (Book)
Electronic Resource
English
Crack Tip Damage Mechanism under Monotonic and Cyclic Loading Conditions
| British Library Online Contents | 2010
AE monitoring of a concrete pipe for damage evaluation under cyclic loading
| British Library Conference Proceedings | 2007
A Study on Crack Propagation in Concrete under Cyclic Loading
| British Library Conference Proceedings | 1998
Damage Prediction in Reinforced Concrete Structures Under Cyclic Loading
| British Library Conference Proceedings | 1994