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142993

Eccentrically Loaded Slender Columns Strengthened by High-Strength Fiber Reinforced Concrete Jackets.

Article

Last updated: 04 Jan 2025

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Tags

Civil Engineering

Abstract

 The behavior of eccentrically loaded cracked slender High-Strength Concrete (HSC) columns strengthened by HSC jackets contain steel fibers and have cube compressive strength equal to 89.3 MPa has been studied experimentally. The results of these tests have been used to examine the applicability of the design requirements of slender columns of the Eurocode 2 (EC-2), the Egyptian code (ECCS-2001) and ACI 318-99 building eode, when applied to the strengthened columns. The testing program included 11 columns with slenderness ratios before strengthening ranged between 17.3 and 69.3. The main variables considered in this study were the slenderness ratio of the strengthened columns, the type of the steel fibers, the end eccentricity of the applied axial load and the transverse reinforcement ratio of the HSC jackets. The results showed that, eccentrically loaded slender and short cracked columns strengthened by HSC jackets contain 1% steel fibers (by volume) can be treated as new integral columns. Using a steel fibers into the HSC mix of the jackets reduces to a great extent the early cover spalling of the tested columns and increases the ultimate loads comparing with the same columns strengthened with HSC jackets without steel fibers. The three different methods for design of slender columns required by the ECCS-2001, EC-2 and ACI 318-99 building code can be safely used for design of slender columns strengthened by HSC jackets contain steel fibers.

DOI

10.21608/bfemu.2021.142993

Keywords

Column Jacket, high-strength concrete, slenderness ratio, codes, strengthening

Authors

First Name

Ahmed

Last Name

Yousef

MiddleName

M.

Affiliation

Structural Engineering Department., Faculty of Engineering, Mansoura University, Egypt.

Email

ahmyousef@mans.edu.eg

City

Mansoura

Orcid

0000-0001-9658-647X

First Name

Mohamed

Last Name

Matthana

MiddleName

H.

Affiliation

Structural Engineering Department., Faculty of Engineering., Mansoura Universit.y, Egypt.

Email

-

City

Mansoura

Orcid

-

Volume

27

Article Issue

4

Related Issue

21026

Issue Date

2002-12-01

Receive Date

2002-09-11

Publish Date

2021-01-25

Page Start

28

Page End

45

Print ISSN

1110-0923

Online ISSN

2735-4202

Article File

BFEMU_Volume 27_Issue 4_Pages 28-45.pdf

PDF . 787.9kB

Link

https://bfemu.journals.ekb.eg/article_142993.html

Detail API

https://bfemu.journals.ekb.eg/service?article_code=142993

Order

4

Type

Research Studies

Type Code

1,205

Publication Type

Journal

Publication Title

MEJ. Mansoura Engineering Journal

Publication Link

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

MainTitle

Eccentrically Loaded Slender Columns Strengthened by High-Strength Fiber Reinforced Concrete Jackets.

Details

Type

Article

Created At

22 Jan 2023