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114505

STRENGTHENING OF LOADED R.C. FRAMES AFTER FIRE EXPOSURE USING F.R.P

Article

Last updated: 23 Jan 2023

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Subjects

-

Tags

Civil Engineering: structural, Geotechnical, reinforced concrete and s…nd sanitary engineering, Hydraulic, Railway, construction Management.

Abstract

One of the most common defects encountered in reinforced concrete structures is the fire exposure. Therefore, strengthening investigations that attempt to increase the ultimate load capacity of the defected structural elements have become an important topic in the field of reinforced concrete studies, specially, for reinforced concrete frames as a whole structure. Recently, composite material such as fiber-reinforced polymer (FRP) started to become a good replacement for strengthening of reinforced concrete elements to compensate the losses in ultimate capacity and energy dissipation due to fire exposure. In the last decade, many researchers and construction applications in industry showed great interest in this field and intensive researches were performed to begin the practical use of these materials in strengthening reinforced concrete structures. In this paper nine reinforced concrete frames have characteristic strength 22.5 MPa of one sixth scale were tested and examined. These frames are divided into three groups, group (A) control frames, group (B) exposed to 600 0C and cooled with air, while the last three frames, group (C) exposed to 600 0C and cooled using water. Each group consists of three frames with different beam to column inertia. Group (A) control frames loaded till to failure to determine the ultimate capacity of sections, while groups (B) and group (C) are loaded to about 0.3 its ultimate load, the load kept constant at this value, then each frame exposed to fire of 600 0C, for at least two hours , then cooled such that with air or using water. After totally cooling each frame strengthened using glass fiber reinforced polymers laminates (GFRP). After strengthening, the load increased gradually up to failure. The ultimate loads, crack pattern, strain progress, mode of failure and energy absorption were here recorded and analyzed.

DOI

10.21608/jesaun.2012.114505

Keywords

R.C. frames, strengthening, fire exposure, loading, glass fiber

Authors

First Name

Alaa

Last Name

Sherif

MiddleName

-

Affiliation

Professor of Concrete, Civil Engineering Dept., Faculty of Engineering, Helwan University, Cairo, Egypt.

Email

-

City

-

Orcid

-

First Name

Nasr Z.

Last Name

Hassan

MiddleName

-

Affiliation

Associate Professor of Concrete, Civil Engineering Dept., Faculty of Engineering, Helwan University, Cairo, Egypt.

Email

nzenhom@yahoo.com

City

-

Orcid

-

First Name

Mostafa A.

Last Name

Osman

MiddleName

-

Affiliation

Assistant Professor of Concrete, Civil Engineering Dept., Faculty of Engineering, Helwan University, Cairo, Egypt.

Email

m_osman62@yahoo.com

City

-

Orcid

-

First Name

Mohammed A.

Last Name

Abo Hamad

MiddleName

-

Affiliation

Ph.D Student, Civil Engineering Dept., Faculty of Engineering, Helwan University, Cairo, Egypt.

Email

-

City

-

Orcid

-

Volume

40

Article Issue

No 5

Related Issue

16871

Issue Date

2012-09-01

Receive Date

2012-06-04

Publish Date

2012-09-01

Page Start

1,325

Page End

1,336

Print ISSN

1687-0530

Online ISSN

2356-8550

Article File

JESAUN_Volume 40_Issue No 5_Pages 1325-1336.pdf

PDF . 253.3kB

Link

https://jesaun.journals.ekb.eg/article_114505.html

Detail API

https://jesaun.journals.ekb.eg/service?article_code=114505

Order

4

Type

Research Paper

Type Code

1,438

Publication Type

Journal

Publication Title

JES. Journal of Engineering Sciences

Publication Link

https://jesaun.journals.ekb.eg/

MainTitle

-

Details

Type

Article

Created At

23 Jan 2023