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Article

Compressive Shear Strength of Reinforced Concrete Walls at High Ductility Levels

Faculty of Civil Engineering, University of Zagreb, 10000 Zagreb, Croatia
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Sustainability 2020, 12(11), 4434; https://doi.org/10.3390/su12114434
Received: 28 April 2020 / Revised: 25 May 2020 / Accepted: 27 May 2020 / Published: 29 May 2020
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’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. View Full-Text
Keywords: analytical model; ductile walls; shear strength; capacity reduction; Eurocode 8 analytical model; ductile walls; shear strength; capacity reduction; Eurocode 8
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MDPI and ACS Style

Kišiček, T.; Renić, T.; Lazarević, D.; Hafner, I. Compressive Shear Strength of Reinforced Concrete Walls at High Ductility Levels. Sustainability 2020, 12, 4434. https://doi.org/10.3390/su12114434

AMA Style

Kišiček T, Renić T, Lazarević D, Hafner I. Compressive Shear Strength of Reinforced Concrete Walls at High Ductility Levels. Sustainability. 2020; 12(11):4434. https://doi.org/10.3390/su12114434

Chicago/Turabian Style

Kišiček, Tomislav, Tvrtko Renić, Damir Lazarević, and Ivan Hafner. 2020. "Compressive Shear Strength of Reinforced Concrete Walls at High Ductility Levels" Sustainability 12, no. 11: 4434. https://doi.org/10.3390/su12114434

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