Analytical study of UHPC beam using truss model

Ultra High Performance Concrete (UHPC) is an advanced concrete material with exceptionally high performance. Its exceedingly high performance is not limited to mechanical properties such as compressive strength and tensile strength. One of UHPC main materials is steel fiber which is used to increase...

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Main Author: Kho, William
Other Authors: Li Bing
Format: Final Year Project
Language:English
Published: Nanyang Technological University 2021
Subjects:
Online Access:https://hdl.handle.net/10356/149001
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-1490012021-05-11T03:59:14Z Analytical study of UHPC beam using truss model Kho, William Li Bing School of Civil and Environmental Engineering CBLi@ntu.edu.sg Engineering::Civil engineering Ultra High Performance Concrete (UHPC) is an advanced concrete material with exceptionally high performance. Its exceedingly high performance is not limited to mechanical properties such as compressive strength and tensile strength. One of UHPC main materials is steel fiber which is used to increase tensile strength and tensile ductility. The advantage of UHPC tensile behavior is useful in many applications, where one of such application is on shear resistance of concrete structures. In reinforced concrete (RC) beam, steel stirrup is normally used to provide shear resistance. However, shear capacity is limited up to the maximum amount of stirrup provided. In this study, a truss model analogy is proposed to study the shear behavior of UHPC beams with shear span-to-depth ratio at least 2.0. The proposed truss model is based on variable angled truss model where UHPC tensile behavior is included into some of the tensile members of the truss model, especially the vertical truss members. The truss model is then validated with UHPC beam experimental result collected from literatures. After validation, a parametric study is conducted using 4 different variables namely shear span-to-depth ratio, UHPC compressive strength, longitudinal bottom rebar ratio, and steel fiber content. Steel fiber content is the main variable in this parametric study. Lastly, an equation is proposed to predict the shear capacity of UHPC beam. This study aims to propose a good prediction of truss model and a good shear capacity prediction equation, which ultimately answers “how much equivalent stirrup can UHPC provide as substitution?” Bachelor of Engineering (Civil) 2021-05-11T03:59:14Z 2021-05-11T03:59:14Z 2021 Final Year Project (FYP) Kho, W. (2021). Analytical study of UHPC beam using truss model. Final Year Project (FYP), Nanyang Technological University, Singapore. https://hdl.handle.net/10356/149001 https://hdl.handle.net/10356/149001 en ST-40 application/pdf Nanyang Technological University
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic Engineering::Civil engineering
spellingShingle Engineering::Civil engineering
Kho, William
Analytical study of UHPC beam using truss model
description Ultra High Performance Concrete (UHPC) is an advanced concrete material with exceptionally high performance. Its exceedingly high performance is not limited to mechanical properties such as compressive strength and tensile strength. One of UHPC main materials is steel fiber which is used to increase tensile strength and tensile ductility. The advantage of UHPC tensile behavior is useful in many applications, where one of such application is on shear resistance of concrete structures. In reinforced concrete (RC) beam, steel stirrup is normally used to provide shear resistance. However, shear capacity is limited up to the maximum amount of stirrup provided. In this study, a truss model analogy is proposed to study the shear behavior of UHPC beams with shear span-to-depth ratio at least 2.0. The proposed truss model is based on variable angled truss model where UHPC tensile behavior is included into some of the tensile members of the truss model, especially the vertical truss members. The truss model is then validated with UHPC beam experimental result collected from literatures. After validation, a parametric study is conducted using 4 different variables namely shear span-to-depth ratio, UHPC compressive strength, longitudinal bottom rebar ratio, and steel fiber content. Steel fiber content is the main variable in this parametric study. Lastly, an equation is proposed to predict the shear capacity of UHPC beam. This study aims to propose a good prediction of truss model and a good shear capacity prediction equation, which ultimately answers “how much equivalent stirrup can UHPC provide as substitution?”
author2 Li Bing
author_facet Li Bing
Kho, William
format Final Year Project
author Kho, William
author_sort Kho, William
title Analytical study of UHPC beam using truss model
title_short Analytical study of UHPC beam using truss model
title_full Analytical study of UHPC beam using truss model
title_fullStr Analytical study of UHPC beam using truss model
title_full_unstemmed Analytical study of UHPC beam using truss model
title_sort analytical study of uhpc beam using truss model
publisher Nanyang Technological University
publishDate 2021
url https://hdl.handle.net/10356/149001
_version_ 1701270471315554304