Dublin Core
Title
Optimization procedure for the strut-and-tie method considering the stiffness of concrete in compression
Subject
Strut and Tie
Compliance minimization
Homogenization method
Hydrostatic stress
Reinforced concrete
Structural optimization
620
Ingeniería
Description
Tesis (Master of Science in Engineering)--Pontificia Universidad Católica de Chile, 2023
An optimization procedure is proposed for finding an optimal truss for the Strut-and-Tie method used to design the steel reinforcement in concrete structural elements. The basis of the procedure is to maximize the global stiffness of the element by optimizing the reinforcement layout but considering the stiffness of concrete in the compressed zones of
the element during the optimization. The hydrostatic stress is used to determine those zones, which change along the maximization. The stiffness provided by the concrete in compression to the overall system during the optimization, result in optimal topologies different from those found in the literature, which, when translated into admissible trusses
for the Strut-and-Tie method, in most cases (analyzed by numerical modeling), lead to reinforced concrete elements that are better in terms of higher ratios of ultimate load over the weight of steel, and also in terms of spreading more evenly the cracks in the damaged zones of the element. Three typical cases from the literature are analyzed. For each case, the
optimal topology and the truss structures derived from it are shown. Finally, the performance of each Strut and Tie system is evaluated using Non-lineal Finite Elements analysis and compared to existing models.
the element during the optimization. The hydrostatic stress is used to determine those zones, which change along the maximization. The stiffness provided by the concrete in compression to the overall system during the optimization, result in optimal topologies different from those found in the literature, which, when translated into admissible trusses
for the Strut-and-Tie method, in most cases (analyzed by numerical modeling), lead to reinforced concrete elements that are better in terms of higher ratios of ultimate load over the weight of steel, and also in terms of spreading more evenly the cracks in the damaged zones of the element. Three typical cases from the literature are analyzed. For each case, the
optimal topology and the truss structures derived from it are shown. Finally, the performance of each Strut and Tie system is evaluated using Non-lineal Finite Elements analysis and compared to existing models.
Creator
Larraín Silva, Maximiliano
Date
2023-07-05T15:39:53Z
2023-07-05T15:39:53Z
2023
Contributor
Gutiérrez Cid, Sergio
Pontificia Universidad Católica de Chile. Escuela de Ingeniería
Rights
acceso abierto
Format
x, 54 páginas
application/pdf
Language
en
Type
tesis de maestría
Identifier
https://repositorio.uc.cl/handle/11534/74102