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Avalanches during flexure of early-age steel fiber reinforced concrete beams
https://orcid.org/0000-0002-0847-2542
Abstract In this work, we studied stress variations occurring during flexure of early-age steel fiber reinforced concrete beams. By preparing beams with different fiber volume ratios, four-point bending tests were performed to evaluate the specimens at different loading rates. A new experimental system was created to collect the stress-time curves collected at 100 kHz sampling rate so that temporal profiles of stress drops were analyzed in high resolution. Meanwhile, stress drops were modeled as avalanches due to interactions between steel fibers and cement matrices during flexure. Good agreement on avalanche statistics and dynamics was obtained between measurements and the predicted power law exponents and scaling functions from the mean field model. The observations of different avalanche types also illustrated the essential failure features evolved during flexure of steel fiber reinforced beams.
Avalanches during flexure of early-age steel fiber reinforced concrete beams
https://orcid.org/0000-0002-0847-2542
Abstract In this work, we studied stress variations occurring during flexure of early-age steel fiber reinforced concrete beams. By preparing beams with different fiber volume ratios, four-point bending tests were performed to evaluate the specimens at different loading rates. A new experimental system was created to collect the stress-time curves collected at 100 kHz sampling rate so that temporal profiles of stress drops were analyzed in high resolution. Meanwhile, stress drops were modeled as avalanches due to interactions between steel fibers and cement matrices during flexure. Good agreement on avalanche statistics and dynamics was obtained between measurements and the predicted power law exponents and scaling functions from the mean field model. The observations of different avalanche types also illustrated the essential failure features evolved during flexure of steel fiber reinforced beams.
Avalanches during flexure of early-age steel fiber reinforced concrete beams
https://orcid.org/0000-0002-0847-2542
Abstract In this work, we studied stress variations occurring during flexure of early-age steel fiber reinforced concrete beams. By preparing beams with different fiber volume ratios, four-point bending tests were performed to evaluate the specimens at different loading rates. A new experimental system was created to collect the stress-time curves collected at 100 kHz sampling rate so that temporal profiles of stress drops were analyzed in high resolution. Meanwhile, stress drops were modeled as avalanches due to interactions between steel fibers and cement matrices during flexure. Good agreement on avalanche statistics and dynamics was obtained between measurements and the predicted power law exponents and scaling functions from the mean field model. The observations of different avalanche types also illustrated the essential failure features evolved during flexure of steel fiber reinforced beams.
Avalanches during flexure of early-age steel fiber reinforced concrete beams
Liu, Zhuang (author) / Worley, Robert (author) / Du, Fen (author) / Giles, Courtney D. (author) / Dewoolkar, Mandar (author) / Huston, Dryver (author) / Tan, Ting (author)
2020
Article (Journal)
Electronic Resource
English
Beam , Avalanche , Steel fibers , Flexure , Concrete
Avalanches during flexure of early-age steel fiber reinforced concrete beams
| Springer Verlag | 2020
Shear-Flexure Coupling Behavior of Steel Fiber-Reinforced Concrete Beams
| Online Contents | 2012
Flexure of reinforced concrete beams
| Engineering Index Backfile | 1904