Effective stiffness and displacement capacity of short reinforced concrete columns with low concrete quality |
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| Authors: | Viorel Popa Dragos Cotofana Radu Vacareanu |
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| Institution: | 1. Department of Reinforced Concrete Structures, Technical University of Civil Engineering of Bucharest, 124 Lacul Tei, Sector 2, 020396, ?Bucharest, Romania
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| Abstract: | Hysteretic behaviour of reinforced concrete members is strongly dependent on local conditions such as quality of materials, workmanship, construction and design practice. Low strength concrete was found in most of the damaged concrete structures after the earthquakes that have hit Eastern Europe in the past 50 years. Quality of concrete had a great impact, especially on shear controlled reinforced concrete short columns. Existing models of the effective strength, stiffness and deformation capacity of structural members need to be confirmed locally by experimental research as the large data sets used to calibrate the analytical models comprise results obtained on specimens with various characteristics. In this study, effective stiffness and deformation models available in literature are compared with the results of an experimental testing program conducted by the authors to investigate the hysteretic response of reinforced concrete short columns with low concrete strength, designed and detailed according to the local practice in the past. The hysteretic behaviour of the specimens is presented together with a comparison of the experimental data with predicted values and conclusions on the suitability of the applied models are drawn. |
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