Future University In Egypt (FUE)
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Altagamoa Al Khames, Main centre of town, end of 90th Street
New Cairo
Faculty of Engineering & Technology

Dina Yehia Zakaria Ewais

Basic information

Name : Dina Yehia Zakaria Ewais
Title: Assistant Lecturer
Personal Info: Dina Yehia Zakaria is a Assistant Lecturer at Future University in Egypt.She graduated from Faculty of Engineering, Ain Shams University, class 2011.she studied the premaster courses and finished it. she is currently do her research in strengthening of reinforced concrete girders using post-tensioned concrete jackets. View More...


Certificate Major University Year
Masters Civil Engineering Ain Shams University - Faculty Of Engineering 2017
Bachelor Civil Engineering Ain Shams University - Faculty Of Engineering 2011

Researches /Publications

Flexural Strengthening of Reinforced Concrete Girders using Post-Tensioned Concrete Jackets - 01/0

Dina Yehia Zakaria Ewais

Amr Abdelrahman; Hussien Okail


This study discusses the flexural behavior of reinforced concrete girders strengthened using posttensioning embedded in concrete jackets. The concept benefits from the external jacket to help increasing the cross-section inertia as well as to host the post-tensioning tendons without the need of external deviators. This results in a significant enhancement to the strength and stiffness of the original girder. The experimental phase of the study was conducted on two stages the first deals with girders loaded on their original section firstly and then strengthened with the jacket and loaded to failure, while the second had the girders that were strengthened before being subjected to loads. In addition to the stage of jacket introduction, the difference between the original girder and the jacket’s concrete compressive strength was also studied. In the analytical phase of the study, a numerical model was built using the finite element method to simulate the response of the tested girders in the two experimental stages. This paper presents findings of the experimental program as well as the comparison with the analytical results of the model which showed a close correlation. This model may then be used with confidence to conduct an extensive analytical study for untested parameters

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