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Structural Engineering and Mechanics Volume 44, Number 2, October25 2012 , pages 163-178 DOI: https://doi.org/10.12989/sem.2012.44.2.163 |
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Modeling of non-seismically detailed columns subjected to reversed cyclic loadings |
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Cao Thanh Ngoc Tran
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| Abstract | ||
| A strut-and-tie model is introduced in this paper to predict the ultimate shear strength of nonseismically detailed columns. The validity and applicability of the proposed strut-and-tie model are evaluated by comparison with available experimental data. The model was developed based on visible crack patterns observed on the test specimens. The concrete contribution is integrated into the strut-and-tie model through a concept of equivalent transverse reinforcement. To further validate the model a full-scale non-seismically detailed reinforced concrete column was tested to investigate its seismic behavior. The specimen was tested under the combination of a constant axial load, 0.30fc\'Ag and quasi-static cyclic loadings simulating earthquake actions. Quasi-static cyclic loadings simulating earthquake actions were applied to the specimen until it could not sustain the applied axial load. The analytical results reveal that the strut-and-tie method is capable of modeling to a satisfactory accuracy the ultimate shear strength of non-seismically detailed columns subjected to reserved cyclic loadings. | ||
| Key Words | ||
| reinforced concrete columns; strut-and-tie; seismic; shear strength | ||
| Address | ||
| Cao Thanh Ngoc Tran: Department of Civil Engineering, International University, Vietnam National University, Ho Chi Minh City, Vietnam | ||