Compressive Shear Strength of Reinforced Concrete Walls at High Ductility Levels
| Autor: | Ivan Hafner, Damir Lazarević, Tomislav Kišiček, Tvrtko Renić |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Materials science
Geography Planning and Development lcsh:TJ807-830 0211 other engineering and technologies lcsh:Renewable energy sources 020101 civil engineering 02 engineering and technology Bending Management Monitoring Policy and Law Curvature 0201 civil engineering ductile walls analytical model shear strength capacity reduction Eurocode 8 Shear strength Arch Reinforcement Ductility lcsh:Environmental sciences lcsh:GE1-350 021110 strategic defence & security studies Renewable Energy Sustainability and the Environment business.industry lcsh:Environmental effects of industries and plants Strength reduction Structural engineering Compression (physics) lcsh:TD194-195 business |
| Zdroj: | Sustainability, Vol 12, Iss 4434, p 4434 (2020) Sustainability Volume 12 Issue 11 |
| ISSN: | 2071-1050 |
| Popis: | The amount of energy dissipated during an earthquake depends on the type of failure of the concrete element. Shear failure should be avoided because less energy is spent than that due to bending failure. Compression controlled failure is usually avoided by increasing the thickness of a wall. Considering that the current code largely decreases this strength, this becomes hard to achieve in practice. Because of that, the analysis described in this paper is made to determine the reason for a large strength reduction at high curvatures. Mechanisms contributing to compression controlled shear strength are analysed. Using Rankine&rsquo s strength theorem, section equilibrium, arch mechanism and bending moment-curvature diagrams, the influence of different parameters are observed and charted. The findings are compared to the existing procedures and a new, simple and safe analytical equation is derived. Compression controlled shear strength is mainly influenced by axial force, followed by the amount of longitudinal reinforcement and the achieved confinement. Results show that the value of strength reduces significantly with the increase of ductility and that some reduction exists even for lower levels of curvature. Current code provisions may lead to unsafe design, so designers should be careful when dealing with potentially critical walls. |
| Databáze: | OpenAIRE |
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