MODELING FRACTURE OF REINFORCED CONCRETE STRUCTURES UNDER IMPACT
| Autor: | P. Radchenko, V S Plevkov, S. Batuev, Andrey Radchenko |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
Materials science
model business.industry Building and Construction Fiber-reinforced concrete Structural engineering Impulse (physics) Pile driver Finite element method law.invention stress strain Mechanics of Materials law fracture Architecture Volume fraction concrete lcsh:Architecture Anisotropy Reinforcement business fiber-reinforced concrete Beam (structure) lcsh:NA1-9428 |
| Zdroj: | Architecture and Engineering, Vol 4, Iss 3, Pp 22-29 (2019) |
| ISSN: | 2500-0055 |
| Popis: | Introduction : The papers presents results of an integrated experimental and numerical study on behavior of reinforced-concrete beams under impulse loading. The beams under study had three layers. The upper and lower layers were of fiber-reinforced concrete with a carbon fiber volume fraction of 0.2%. The middle layer was of concrete with metal reinforcement. Methods : Experimental studies were performed using a pile driver. A falling weight of 450 kg was dropped on a beam from a height of 0.7 m. The authors performed numerical studies based on the finite element method in a full dynamic 3D setting, using the proprietary EFES software suite considering structure fragmentation, formation of contact and free surfaces. Results : In numerical modeling, the reinforcement mesh was clearly defined. The authors studied changes over time in the stress-strain state, and fracture of reinforced-concrete beams under short-term impact loading. They developed a calculation algorithm and procedure that made it possible to analyze and predict behavior of actual structures in a full dynamic 3D setting. They also proposed a model of concrete and fiber-reinforced concrete behavior, considering anisotropy, bimodularity with regard to strength characteristics, plastic properties, and relations between strength and strain rate / pressure. Fracture dynamics in concrete beams reinforced with metal bars was studied. Good agreement of the results with the experimental data was observed. |
| Databáze: | OpenAIRE |
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