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Verification of reinforced concrete D-regions designed with strut-and- tie models by nonlinear FE-Methods

 Verification of reinforced concrete D-regions designed with strut-and- tie models by nonlinear FE-Methods
Author(s): ,
Presented at IABSE Congress: Engineering for Sustainable Development, New Delhi, India, 20-22 September 2023, published in , pp. 1424-1432
DOI: 10.2749/newdelhi.2023.1424
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The design of structural discontinuities (D-Regions) of reinforced concrete (RC) structures, such as openings and dapped ends, put practical engineers in a challenging situation. Few skilled enough...
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Bibliographic Details

Author(s): (University of Wuppertal, Wuppertal, Germany)
(University of Wuppertal, Wuppertal, Germany)
Medium: conference paper
Language(s): English
Conference: IABSE Congress: Engineering for Sustainable Development, New Delhi, India, 20-22 September 2023
Published in:
Page(s): 1424-1432 Total no. of pages: 9
Page(s): 1424-1432
Total no. of pages: 9
DOI: 10.2749/newdelhi.2023.1424
Abstract:

The design of structural discontinuities (D-Regions) of reinforced concrete (RC) structures, such as openings and dapped ends, put practical engineers in a challenging situation. Few skilled enough, develop Strut-and-Tie Models (STM) for the design. ln this paper, the ultimate load capacities of a deep beam designed with STM are checked and examined with the help of nonlinear FEM simulations. These were performed with two different material models: The Concrete-Damaged- Plasticity (CDPM) in Abaqus and the Coupled-Damage-Plasticity-Microplane (MPM) in Ansys. This paper provides an overview of all the relevant aspects regarding modelling the material nonlinearities and provides an example on how to use both material models. The conclusions of this work shall pave the way for further studies, especially for D-Regions with non-metallic reinforcement such as Glass Fibre Reinforced Polymer (GFRP) rebars.

Keywords:
design deep beam strut-and-tie models fracture energy D-regions non-linear finite element method (FEM) reinforced concrete simulation finite- element-method microplane concrete material models