Nonlinear finite element analysis of RC beams strengthened with steel fiber-reinforced concrete (SFRC) overlays
Other Title(s)
التحليل اللاخطي بطريقة العناصر المحدودة للجوائز الخرسانية المسلحة و المدعمة بالطبقات الخرسانية المسلحة بالألياف الفولاذية
Dissertant
Thesis advisor
University
Islamic University
Faculty
Faculty of Engineering
Department
Department of Civil Engineering
University Country
Palestine (Gaza Strip)
Degree
Master
Degree Date
2015
English Abstract
The behavior of RC beams strengthened with steel fiber-reinforced concrete (SFRC) overlays was studied by Finite Element Analysis software ANSYS.
Four beams, three of them were experimentally tested in previous research were considered.
The first beam was considered as a control beam made of ordinary concrete, while the second one was modeled using SFRC material properties.
The third one is a beam with two material properties, the original part, which is made of ordinary concrete that needed to be strengthened and the overlay, which is made of SFRC material.
The fourth beam is the same as the third one, except the SFRC, part is at bottom as an underlay.
To ensure a monolithical behavior, a weld-bond strengthening techniques were used.
Ordinary concrete, as well, Steel Fiber-Reinforced Concrete was modeled using the multilinear isotropic hardening constants where it is assumed to have a linear behavior up to 30% of compressive strength.
Afterwards, a multilinear stress-strain curve was defined.
For reinforcing steel, a linear elastic-perfect plastic material model was used.
Steel fiber reinforced concrete was modeled using two methods, the smeared model and the discrete model.
The results obtained by FEA showed a good agreement with those obtained by an experimental program.
For beams strengthened with SFRC overlays, results indicated a remarkable improvement in the load carrying capacity and ductility by 15% and 8%, respectively.
While for beams strengthened with SFRC underlays, results indicated an improvement in both load carrying capacity and overall ductility by about 24% and 162%, respectively.
In both cases, the welding of stirrups prevents diagonal cracks from proliferating into the compression zone.
A parametric study indicated an improvement in load carrying capacity with higher SFRC compressive strength values, while increasing the fraction volumes in the SFRC overlay did not affect the results significantly.
The results of this research indicated that it is possible to predict the behavior of beams strengthened with SFRC overlays and underlays using FEA without the need for costly experimental testing.
While the importance of this research comes from the fact that if the use of numerical analysis can predict the behavior of beams with SFRC overlays, this will help researchers predicting the behavior of beams with different configurations without the need to go through the lengthy experimental programs.
Main Subjects
Topics
No. of Pages
77
Table of Contents
Table of contents.
Abstract.
Abstract in Arabic.
Chapter One : Introduction.
Chapter Two : Background and literature review.
Chapter Three : Numerical modeling of reinforced concrete material.
Chapter Four : Case study.
Chapter Five : Discussion of FEA results.
Chapter Six : Summary and conclusions.
References.
American Psychological Association (APA)
Ashur, Muhammad Husayn. (2015). Nonlinear finite element analysis of RC beams strengthened with steel fiber-reinforced concrete (SFRC) overlays. (Master's theses Theses and Dissertations Master). Islamic University, Palestine (Gaza Strip)
https://search.emarefa.net/detail/BIM-688218
Modern Language Association (MLA)
Ashur, Muhammad Husayn. Nonlinear finite element analysis of RC beams strengthened with steel fiber-reinforced concrete (SFRC) overlays. (Master's theses Theses and Dissertations Master). Islamic University. (2015).
https://search.emarefa.net/detail/BIM-688218
American Medical Association (AMA)
Ashur, Muhammad Husayn. (2015). Nonlinear finite element analysis of RC beams strengthened with steel fiber-reinforced concrete (SFRC) overlays. (Master's theses Theses and Dissertations Master). Islamic University, Palestine (Gaza Strip)
https://search.emarefa.net/detail/BIM-688218
Language
English
Data Type
Arab Theses
Record ID
BIM-688218