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Impact Resistance of Steel Fiber All‐Lightweight Concrete Beams Based on the Effect of Fiber Type
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Impact Resistance of Steel Fiber All‐Lightweight Concrete Beams Based on the Effect of Fiber Type
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Impact Resistance of Steel Fiber All‐Lightweight Concrete Beams Based on the Effect of Fiber Type
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Journal Article
Impact Resistance of Steel Fiber All‐Lightweight Concrete Beams Based on the Effect of Fiber Type
2026
Overview
The mechanical performance of all‐lightweight concrete (ALC) structures can be significantly improved through the incorporation of steel fibers. However, research on the dynamic response of steel fiber–reinforced all‐lightweight concrete (SFALC) structures under impact loading remains limited. This study systematically investigates the impact resistance of SFALC beams reinforced with flat and corrugated steel fibers through drop hammer impact tests. Five SFALC beams were specifically designed and tested to analyze the effects of different fiber geometries on their impact performance. Experimental results demonstrate that both flat and corrugated steel fibers enhance the structural stiffness, mitigate crack initiation and propagation, shorten the duration of the initial impact peak, and reduce peak and residual displacements, thereby improving overall damage resistance. Notably, corrugated steel fibers exhibit superior efficacy in mitigating impact‐induced damage, reducing peak impact force, and enhancing the structural integrity of the beams compared to flat fibers. As the impact velocity increases, both types of specimens exhibit pronounced local punching failure. However, beams reinforced with corrugated steel fibers experience significantly reduced punching damage, indicating superior impact resistance. These findings provide valuable insights into optimizing the design of high‐performance ALC structures for impact‐resistant applications.
