Detecting and Evaluating Fatigue Damage Mechanisms in Concrete with Embedded Aggregate Sensors
Ziwei Song, Shoushan Cheng, Haifang He, Wanheng Li, Yusheng Liu
TL;DR
This paper introduces a new method using embedded sensors to study how fatigue damage develops inside concrete structures during repeated loading.
Contribution
The novel use of embedded aggregate sensors enables quantitative monitoring of internal strain evolution during concrete fatigue.
Findings
Embedded aggregate sensors effectively capture internal strain localization during fatigue damage.
Strain evolution turning points correlate with microcrack initiation and stable crack propagation.
The method reveals stress transfer route changes caused by crack propagation in concrete.
Abstract
Fatigue damage is a critical factor for the long-term service performance degradation of concrete structures. Nevertheless, the mesoscopic fatigue process is still debatable due to material heterogeneity and the complex internal damage progression. To further investigate the internal damage mechanism of concrete under fatigue loading, this study quantitatively monitors the dynamic internal strain evolution of concrete prismatic specimens during uniaxial compression high-cycle fatigue by designing and embedding aggregate sensors (EAS). The results indicated that EAS may effectively reflect concrete cracking, and the approach can properly capture the internal strain field redistribution features of concrete. Significant internal strain localization was observed during fatigue damage. The turning points in strain evolution, which correlate with the stages of stable propagation and…
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Taxonomy
TopicsRock Mechanics and Modeling · Structural Health Monitoring Techniques · Smart Materials for Construction