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A DIC-Based Study on Compressive Responses of Concrete after Exposure to Elevated Temperatures
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A DIC-Based Study on Compressive Responses of Concrete after Exposure to Elevated Temperatures
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Journal Article
A DIC-Based Study on Compressive Responses of Concrete after Exposure to Elevated Temperatures
2019
Overview
This paper provides an experimental investigation on the cracking process and residual mechanical properties of concrete after exposure to elevated temperatures. A total of 36 standard concrete prism specimens were tested after exposure to high temperatures of up to 600 °C. The failure modes, cracking process, residual mechanical properties, deformation characteristics and the strain distribution on the surface during the loading procedure were presented. The influences of exposure temperature and water–cement ratio (w/c) were interpreted. The digital image correlation (DIC) method was applied to quantitatively and visually characterize the development of cracking and relative displacement on the concrete surface. The findings suggest that the residual compressive strength and elastic modulus of the concrete decreases gradually with the increasing temperature, especially in the specimens with lower w/c ratio. The DIC technique provides an effective means to measure very precise and detailed information, including the crack opening and distribution of strain on the concrete surface.
Publisher
MDPI AG,MDPI
Subject
