Structural Engineering and Mechanics

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Finite element micro-modelling of RC frames with variant configurations of infill masonry

  • Mohammad, Aslam F. (Department of Civil Engineering, NED University of Engineering and Technology) ;
  • Khalid, Fatima (Department of Civil Engineering, NED University of Engineering and Technology) ;
  • Khan, Rashid A. (Department of Earthquake Engineering, NED University of Engineering and Technology)
  • Received : 2021.06.24
  • Accepted : 2021.11.07
  • Published : 2022.02.25
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Abstract

The presence of infill generally neglected in design despite the fact that infill contribution significantly increase the lateral stiffness and strength of the reinforced concrete frame structure. Several experimental studies and computational models have been proposed to capture the rational response of infill-frame interaction at global level. However, limited studies are available on explicit finite element modelling to study the local behavior due to high computation and convergence issues in numerical modelling. In the current study, the computational modelling of RC frames is done with various configurations of infill masonry in terms of types of blocks, lateral loading and reinforcement detailing employed with material nonlinearities, interface contact issues and bond-slip phenomenon particularly near the beam-column joints. To this end, extensive computational modelling of five variant characteristics test specimens extracted from the detailed experimental program available in literature and process through nonlinear static analysis in FEM code, ATENA generally used to capture the nonlinear response of reinforced concrete structures. Results are presented in terms of damage patterns and capacity curves by employing the finest possible detail provided in the experimental program. Comparative analysis shows that good correlation amongst the experimental and numerical simulated results both in terms of capacity and crack patterns.

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