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Advances in Concrete Construction Volume 5, Number 2, April 2017 , pages 155-171 DOI: https://doi.org/10.12989/acc.2017.5.2.155 |
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Evaluation of the influence of creep and shrinkage determinants on column shortening in mid-rise buildings |
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Ali B-Jahromi, Abdulazeez Rotimi, Shivan Tovi, Charles Goodchild and Joseph Rizzuto
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| Abstract | ||
| The phenomenon of concrete column shortening has been widely acknowledged since it first became apparent in the 1960s. Axial column shortening is due to the combined effect of elastic and inelastic deformations, shrinkage and creep. This study aims to investigate the effects of ambient temperature, relative humidity, cement hardening speed and aggregate type on concrete column shortening. The investigation was conducted using a column shortening prediction model which is underpinned by the Eurocode 2. Critical analysis and evaluation of the results showed that the concrete aggregate types used in the concrete have significant impact on column shortening. Generally, aggregates with higher moduli of elasticity hold the best results in terms of shortening. Cement type used is another significant factor, as using slow hardening cement gives better results compared to rapid hardening cement. This study also showed that environmental factors, namely, ambient temperature and relative humidity have less impact on column shortening. | ||
| Key Words | ||
| concrete; creep and shrinkage; mid-rise buildings; column shortening | ||
| Address | ||
| Ali B-Jahromi: Department of Civil Engineering, School of Computing and Engineering, University of West London, W5 5RF, London, UK Abdulazeez Rotimi and Shivan Tovi: School of Computing and Engineering, University of West London, W5 5RF, London, UK Charles Goodchild: The Concrete Centre, SW1V 1HU, London, UK Joseph Rizzuto: Department of Civil Engineering, School of Computing and Engineering, University of West London, W5 5RF, London, UK | ||
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