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97680

Effect of Confinement Techniques on Mechanical Behavior of Over-Reinforced HSC Beams.

Article

Last updated: 22 Jan 2023

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Subjects

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Tags

Civil Engineering

Abstract

Over-reinforced high strength concrete, HSC, sections are restricted in most design codes to avoid the brittle compression failure of concrete which occurs suddenly without warnings. Recently, there have been significant improvements in construction industry that needs to use over-reinforced sections in huge projects such as, high-rise buildings and bridges. Limited trials have been carried out to strengthen the over-reinforced section by using proper confinement in the compression zone. This confinement restrains the lateral expansion and failure of concrete in the compression zone. HSC provides high strength but lower ductility than normal strength concrete. This low ductility limits the benefit of using HSC in building safe structures.
This study investigates experimentally the effect of installing different configurations of confinement techniques in the compression zone of over reinforcement high concrete beams. These configurations contain confined by square ties, wrapping fiber reinforced epoxy sheet, and fiber reinforced concrete in compression zone. Four groups of beams made of HSC were cast and tested under three-point loading, with emphasis placed on the mid span deflection. The first group served as a reference beam. Results of testing the four groups proved that the suggested techniques of confinement for HS reinforced concrete beams gave highest values for first crack and ultimate loading and maximum beam deflection. Moreover, the crack pattern and mode of failures were changed from sudden compression-shear failure for control beam to multiple tensions cracking for confinement beams

DOI

10.21608/bfemu.2020.97680

Keywords

High strength concrete, Confinement method, Fiber reinforcement concrete, Fiber reinforced epoxy, Stirrups pitch, Strength and ductility

Authors

First Name

Seleem

Last Name

Ahmad

MiddleName

Saleh Elsaid

Affiliation

Professor,Mat.Dept., Faculty of Engineering Zagazig University, Egypt

Email

seleemahmad62@yahoo.com

City

-

Orcid

-

First Name

Mohamed

Last Name

El-Shikh

MiddleName

Yousry

Affiliation

Professor, Str.Dept., Faculty of engineering, El mansura,University,Egypt

Email

mohamed_elshikh@yahoo.com

City

-

Orcid

-

First Name

Mohamed

Last Name

Elmahdy

MiddleName

Ahmed Refaat

Affiliation

Assistant Lecturer, Misr Higher Institute of Eng.&Tech,Elmansura,Egypt

Email

engmohamed_elmahdy@yahoo.com

City

-

Orcid

-

Volume

42

Article Issue

4

Related Issue

14735

Issue Date

2017-12-01

Receive Date

2017-04-23

Publish Date

2020-06-24

Page Start

21

Page End

26

Print ISSN

1110-0923

Online ISSN

2735-4202

Article File

BFEMU_Volume 42_Issue 4_Pages 21-26.pdf

PDF . 344.4kB

Link

https://bfemu.journals.ekb.eg/article_97680.html

Detail API

https://bfemu.journals.ekb.eg/service?article_code=97680

Order

6

Type

Research Studies

Type Code

1,205

Publication Type

Journal

Publication Title

MEJ. Mansoura Engineering Journal

Publication Link

https://bfemu.journals.ekb.eg/

MainTitle

-

Details

Type

Article

Created At

22 Jan 2023