Title: Design and Numerical Analysis of Reinforced Concrete Deep Beams
Abstract: DESIGN AND NUMERICAL ANALYSIS OF REINFORCED CONCRETE DEEP BEAMS Many studies and much research have been done on the design and structural behaviour of reinforced concrete deep beams. In these studies different calculation methods were used. The Beam Method has been used for many years, the Strut-and-Tie Method is recently included in the Eurocode and in the ACI code. New computer programs based on the Linear Finite Element Method claim to be user friendly and present a complete packet not only as an analysing tool but also as a design program. This research aims mainly at finding the most economical way to design deep beams. In order to reach this goal eleven often-occurring or challenging deep beams have been investigated. The results have been used to validate the design methods and to expose possible weaknesses in both code compliance and clarity of the design process. Conclusions: The non-linear analyses show that the designs obtained with the previous mentioned methods provide sufficient load carrying capacity for the ULS. For some designs the capacity was much larger than needed. For the SLS, the designs made with both the Strut-and-Tie Method (STM) and the Linear Finite Element Method (L-FEM) show sufficiently small crack widths. Designs made with the Beam Method sometimes give too large crack widths in the SLS. The best deep beam design method for the reinforcement quantities is the L-FEM because it can be done quickly, the result fulfils all performance requirements and the design is economical. However, detailing the reinforcement should be done with complete understanding of the flow of forces in the structure. The continuity and anchorage of the reinforcing bars are essential to obtain a good design. For this the STM needs to be used qualitatively. Recommendations: Effort can be made for STM to be more competitive by simplifying it, and by making it more efficient in using the mesh-reinforcement. Some introduction training on truss-design may also be very helpful for starting engineers. The logical judgement of the structural engineer is key to obtain a good design. Blindly using a program or following a design method may lead to dependency, which may lead to a fatal error. Evaluating and checking the results logically should stay a priority. Design and Numerical Analysis of reinforced concrete Deep Beams _________________________________________________________ 9 October 2007 Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ABSTRACT 7
Publication Year: 2007
Publication Date: 2007-01-01
Language: en
Type: article
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Cited By Count: 1
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