Punching shear resistance of reinforced concrete flat plate slab strengthened with CFRP

Dissertant

Abd al-Rida, Asil Abd al-Aziz

Thesis advisor

Hammud, Muhammad J.
Sayhood, Iyad K.

University

University of Technology

Faculty

Building and Construction Department

University Country

Iraq

Degree

Master

Degree Date

2012

English Abstract

crushing of concrete and yielding of steel reinforcement.

Also, the evaluation of the CFRP strips enhancement in shear strength of RC slabs is investigated.

Different types of RC slabs strengthened with CFRP strips have been analyzed.

Available experimental results are chosen to check the validity and the accuracy of the adopted models.

In general, a good agreement is obtained between the finite element and the experimental results.

The maximum percentage difference in ultimate load-carrying capacity is 8.83%.

Several parametric studies have been carried out to investigate the effects of some important material parameters on the behavior of strengthened RC slabs.

These parameters are the concrete compressive strength, the concrete tensile strength, the number of layers of CFRP strips, the configuration of CFRP strips and the effect of diagonal stirrups of CFRP.

Two RC slabs strengthened with CFRP strips have been analyzed to investigate the above situations.

It was found that for a strengthened RC slabs, an increase in the ultimate load of 4.667% has been achieved when the compressive strength of concrete was increased from 28.27 to 40MPa.

An increase in the ultimate load of 5% has been achieved when the tensile strength of concrete was increased from √fc to 0.15 .

When the number of layers of CFRP strips was increased from 2 to 3 layers, the ultimate load increased by 2.006%, when the number of layers of CFRP strips was increased from 2 to 4 layers, the ultimate load increased by 5.406%.

Also, when the radial wrapping of CFRP was used instead of tangential wrapping the ultimate load decreased in range of 2.64% to 11.875.

When the tangential wrapping was used in the absence of diagonal stirrups of CFRP, the ultimate load decreased by 6.667%, and the ultimate deflection increased by 20.89%, when the radial wrapping was used, in the absence of diagonal stirrups of CFRP, the ultimate load decreased by 7.306%, and the ultimate deflection increased by 30.872%.

Main Subjects

Engineering & Technology Sciences (Multidisciplinary)

Topics

• Building materials
• Concrete
• Reinforced concrete

• APA
• MLA
• AMA

Language

English

Data Type

Arab Theses

Record ID

BIM-418797