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Title: Numerical modeling of a reinforced concrete beam with and without expanded polystyrene beads
Authors: Abdel Khalek, Lara
Advisors: Ghannoum, Maria
Keywords: Expanded polystyrene, lightweight concrete, finite element analysis, Mazar non local damage model, crack behavior, deterministic approach, stochastic approach, four point bending.
Subjects: Waste products as building materials
Dissertations, Academic
University of Balamand--Dissertations
Issue Date: 2023
Waste included concrete have been intensively studied recently to help decrease the effect of wastes in landfills and reduce pollution forms (land, air, or water). Introducing wastes in concrete helps in reducing the consumption of raw materials, where various studies has proven its benefits as a good replacement of concrete components. Recycled Expanded polystyrene (EPS) beads, a form of plastic, is a lightweight waste used in lightweight concrete as replacement of aggregates. Several experimental studies have been done to test the mechanical properties of EPS concrete, but few numerical finite element studies have been tested.
The objective of this work is to numerically model reinforced lightweight concrete beams subjected to 4-point bending. Several mixtures have been used, such as medium strength concrete with 0, 2 and 3 kg/m3 EPS. Mazars damage model with stress-based non local approach have been used to describe the behavior of concrete. The use of EPS increases the spatial variability of concrete mechanical properties (tensile strength and Young’s modulus). Thus, this variability is numerically introduced using Gaussian random fields on these mechanical properties. Stochastic finite element models proved to be an accurate tool to reproduce the mechanical behavior of concrete with recycled EPS. This method allowed the prediction of mean and standard deviation of the maximum force and the maximum deflection for beams subjected to 4-point bending, for concrete having EPS weight ranging between 0 and 3 kg/m3
Includes bibliographical references (p. 65-68)
Rights: This object is protected by copyright, and is made available here for research and educational purposes. Permission to reuse, publish, or reproduce the object beyond the personal and educational use exceptions must be obtained from the copyright holder
Ezproxy URL: Link to full text
Type: Thesis
Appears in Collections:UOB Theses and Projects

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