Effect of impact velocity on the failure modes of a RC beam
| Autor: | H.M. Wen, J.S. Cheng |
|---|---|
| Rok vydání: | 2022 |
| Předmět: |
Materials science
Mechanical Engineering Constitutive equation Rebar Aerospace Engineering Ocean Engineering Mechanics Bending Strain rate law.invention Shear (sheet metal) Impact velocity Mechanics of Materials law Automotive Engineering Physics::Accelerator Physics Safety Risk Reliability and Quality Failure mode and effects analysis Beam (structure) Civil and Structural Engineering |
| Zdroj: | International Journal of Impact Engineering. 160:104061 |
| ISSN: | 0734-743X |
| Popis: | It has been experimentally observed that the failure mode of RC beams can change from bending to shear as impact velocity increases. In this note, the effect of impact velocity on the response and failure of a RC beam is studied numerically using a recently developed dynamic constitutive model for concrete. Furthermore, an analytical equation is proposed to define critical condition for the transition of failure modes in the RC beam subjected to impact loading. It transpires that the numerical results are in good agreement with the experimental observations in terms of load-displacement curve, crack pattern and transition of failure mode. It also transpires that the analytical equation can predict the transition of failure mode in the RC beam and that different strain rate sensitivities (namely, dynamic increase factors or DIFs) of rebar steels (bending and shear reinforcements) and concrete are responsible for the transition of failure modes in RC beams from bending to shear as impact velocity increases. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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