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Computers and Concrete Volume 8, Number 1, February 2011 , pages 43-57 DOI: https://doi.org/10.12989/cac.2011.8.1.043 |
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Force-deformation behaviour modelling of cracked reinforced concrete by EXCEL spreadsheets |
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Nelson Lam, John Wilson and Elisa Lumantarna
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| Abstract | ||
| Force-deformation modelling of cracked reinforced concrete is essential for a displacementbased seismic assessment of structures and can be achieved by fibre-element analysis of the cross-section of the major lateral resisting elements. The non-linear moment curvature relationship obtained from fibreelement analysis takes into account the significant effects of axial pre-compression and contributions by the longitudinal reinforcement. Whilst some specialised analysis packages possess the capability of incorporating fibre-elements into the modelling (e.g., RESPONSE 2000), implementation of the analysis on EXCEL is illustrated in this paper. The outcome of the analysis is the moment-curvature relationship of the wall cross-section, curvature at yield and at damage control limit states specified by the user. Few software platforms can compete with EXCEL in terms of its transparencies, versatility and familiarity to the computer users. The program has the capability of handling arbitrary cross-sections that are without an axis of symmetry. Application of the program is illustrated with examples of typical cross-sections of structural walls. The calculated limiting curvature for the considered cross-sections were used to construct displacement profiles up the height of the wall for comparison with the seismically induced displacement demand. | ||
| Key Words | ||
| deformation modelling; cracked reinforced concrete; deflection; EXCEL; spreadsheets; fibre element analysis; RESPONSE 2000. | ||
| Address | ||
| Nelson Lam: Dept. of Civil & Environmental Engineering, c/o School of Engineering, University of Melbourne, Parkville, 3010, Australia John Wilson: Swinburne University of Technology, Hawthorne, Victoria, Australia Elisa Lumantarna: Dept. of Civil & Environmental Engineering, c/o School of Engineering, University of Melbourne, Parkville, 3010, Australia | ||