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Advances in Concrete Construction Volume 10, Number 3, September 2020 , pages 185-193 DOI: https://doi.org/10.12989/acc.2020.10.3.185 |
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Strut-and-tie model for shear capacity of corroded reinforced concrete columns |
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Cao Thanh Ngoc Tran, Xuan Huy Nguyen, Huy Cuong Nguyen and Ngoc Son Vu
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| Abstract | ||
| An analytical model is developed in this paper to predict the shear capacity of reinforced concrete (RC) columns with corroded transverse reinforcements. The shear strength model for corroded RC columns is proposed based on modifying the existing strut-and-tie model, which considers the deformational compatibility between truss and arch mechanisms. The contributions to the shear strength from both truss and arch mechanisms are incorporated in the proposed model. The effects of corrosion level of transverse reinforcements are considered in the proposed model through the minimum residual cross-sectional area of transverse reinforcements and the reduction of concrete compressive strength for the cover area. The shear strengths calculated from the developed model are compared with the experimental results from Vu\'s study (2017), which consisted of RC columns with corroded transverse reinforcements showing shear failure under the cyclic loading. The comparison results indicate satisfactory correlations. Parametric studies are conducted based on the developed shear strength model to explore the effects of column axial loading, aspect ratios, transverse reinforcements and the corrosion levels in transverse reinforcements to the shear strength of RC columns with corroded transverse reinforcements. | ||
| Key Words | ||
| reinforced concrete; column; corrosion; shear strength; seismic | ||
| Address | ||
| Cao Thanh Ngoc Tran: Department of Civil Engineering, International University, Ho Chi Minh City, Vietnam; Vietnam National University, Ho Chi Minh City, Vietnam Xuan Huy Nguyen: Faculty of Construction Engineering, University of Transport and Communications, Vietnam Huy Cuong Nguyen: Faculty of Construction Engineering, University of Transport and Communications, Vietnam Ngoc Son Vu: Department of Structural Mechanics, National University of Civil Engineering, Vietnam | ||
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