EXPLICIT EXPRESSION FOR EFFECTIVE MOMENT OF INERTIA OF RC BEAMS

  • K. A. PATEL IIT Delhi, New Delhi
  • ANKIT BHARDWAJ IIT Delhi, New Delhi
  • SANDEEP CHAUDHARY Malaviya National Institute of Technology Jaipur, India
  • A. K. NAGPAL IIT Delhi
Keywords: CONCRETE CRACKING, DEFLECTION, FINITE ELEMENT ANALYSIS, MOMENT OF INERTIA, NEURAL NETWORK, REINFORCED CONCRETE, TENSION STIFFENING

Abstract

DEFLECTION IS AN IMPORTANT DESIGN PARAMETER FOR STRUCTURES SUBJECTED TO SERVICE LOAD. THIS PAPER PROVIDES AN EXPLICIT EXPRESSION FOR EFFECTIVE MOMENT OF INERTIA CONSIDERING CRACKING, FOR UNIFORMLY DISTRIBUTED LOADED REINFORCED CONCRETE (RC) BEAMS. THE PROPOSED EXPLICIT EXPRESSION CAN BE USED FOR RAPID PREDICTION OF SHORT-TERM DEFLECTION AT SERVICE LOAD. THE EXPLICIT EXPRESSION HAS BEEN OBTAINED FROM THE TRAINED NEURAL NETWORK CONSIDERING CONCRETE CRACKING, TENSION STIFFENING AND ENTIRE PRACTICAL RANGE OF REINFORCEMENT. THREE SIGNIFICANT STRUCTURAL PARAMETERS HAVE BEEN IDENTIFIED THAT GOVERN THE CHANGE IN EFFECTIVE MOMENT OF INERTIA AND THEREFORE DEFLECTION. THESE THREE PARAMETERS ARE CHOSEN AS INPUTS TO TRAIN NEURAL NETWORK. THE TRAINING DATA SETS FOR NEURAL NETWORK ARE GENERATED USING FINITE ELEMENT SOFTWARE ABAQUS. THE EXPLICIT EXPRESSION HAS BEEN VALIDATED FOR A NUMBER OF SIMPLY SUPPORTED AND CONTINUOUS BEAMS AND IT IS SHOWN THAT THE PREDICTED DEFLECTIONS HAVE REASONABLE ACCURACY FOR PRACTICAL PURPOSE. A SENSITIVITY ANALYSIS HAS BEEN PERFORMED, WHICH INDICATES SUBSTANTIAL DEPENDENCE OF EFFECTIVE MOMENT OF INERTIA ON THE SELECTED INPUT PARAMETERS.

Author Biographies

K. A. PATEL, IIT Delhi, New Delhi

K. A. Patel is a Research Scholar at Civil Engineering Department, Indian Institute of Technology Delhi, New Delhi, India. He received his B.E. from L. D. college of engineering, Ahmedabad, India in 2007; M.Tech. from Malaviya National Institute of Technology, Jaipur, India in 2009. He has joined Indian Institute of Technology, New Delhi to pursue Ph.D. in 2009. His research interests include reinforced concrete and steel-concrete composite structures and soft computing.

ANKIT BHARDWAJ, IIT Delhi, New Delhi

Ankit Bhardwaj is a Research Scholar at Civil Engineering Department, Indian Institute of Technology Delhi, New Delhi, India. He received his B. Tech. from Malaviya National Institute of Technology, Jaipur, India in 2008; M.Tech. from Indian Institute of Technology, New Delhi India in 2012. He has continued Indian Institute of Technology, New Delhi to pursue Ph.D. His research interests include steel-concrete composite structures and earthquake engineering

SANDEEP CHAUDHARY, Malaviya National Institute of Technology Jaipur, India

Sandeep Chaudhary is an Associate Professor at Civil Engineering Department, Malaviya National Institute of Technology, Jaipur, India. He received his B.E. from M. B. M. Engineering college, Jodhpur, India in 1996; M.Tech. from Malaviya National Institute of Technology, Jaipur, India in 1999; and Ph.D. from Indian Institute of Technology Delhi, New Delhi, India in 2006. His research interests include durability of concrete; service load behaviour of concrete and composite structures; and soft computing

A. K. NAGPAL, IIT Delhi

A. K. Nagpal is Dogra chair Professor at Civil Engineering Department, Indian Institute of Technology Delhi, New Delhi, India. He received his B.Tech. from Indian Institute of Technology Bombay, Mumbai, India in 1968; M.Tech. and Ph.D. from Indian Institute of Technology Delhi, New Delhi, India in 1971 and 1976 respectively. His research interests include time effects in reinforced concrete and steel-concrete composite structures, geotechnical earthquake engineering and tall buildings.

 

Published
2014-10-13
Section
Articles