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Structural Engineering and Mechanics Volume 36, Number 2, September30 2010 , pages 165-179 DOI: https://doi.org/10.12989/sem.2010.36.2.165 |
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Neural networks for inelastic mid-span deflections in continuous composite beams |
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Umesh Pendharkar, Sandeep Chaudhary and A.K. Nagpal
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| Abstract | ||
| Maximum deflection in a beam is a design criteria and occurs generally at or close to the mid-span. Neural networks have been developed for the continuous composite beams to predict the inelastic mid-span deflections (typically for 20 years, considering cracking, and time effects, i.e., creep and shrinkage, in concrete) from the elastic moments and elastic mid-span deflections (neglecting instantaneous cracking and time effects). The training and testing data for the neural networks is generated using a hybrid analytical-numerical procedure of analysis. The neural networks have been validated for four example beams and the errors are shown to be small. This methodology, of using networks enables a rapid estimation of inelastic mid-span deflections and requires a computational effort almost equal to that required for the simple elastic analysis. The neural networks can be extended for the composite building frames that would result in huge saving in computational time. | ||
| Key Words | ||
| neural network; creep; shrinkage; composite beam; concrete cracking. | ||
| Address | ||
| Umesh Pendharkar: Department of Civil Engineering, Ujjain Engineering College, Indore Road, Ujjain (M.P.), India Sandeep Chaudhary: Department of Structural Engineering, Malaviya National Institute of Technology, Jaipur 302017, India A.K. Nagpal: Department of Civil Engineering, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 11016, India | ||