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Cairo, Egypt

Tawfik M.Y.,El Shorouk Academy
Journal of Engineering and Applied Science | Year: 2012

Commitment to preserve heritage and achievements of humanity, protecting it against deterioration and loss, and working on its conservation and maintenance is considered as a national aim adopted by civilized countries and communities; it is a global principle as heritage belongs to humanity. Laws are passed, regulations and legislations are issued, and projects are implemented to preserve and obligate the maintenance and preservation of heritage and all cultural symbols, civic and urban gatherings, squares, buildings, edifices, and landmarks that represents the outcomes and achievements of the past civilizations. One of these projects is the development project of El-Khazendar square and reuses Sednaoui building launched by National Organization for Urban Harmony in a competition that was arbitrated and three best projects were selected to receive the first three awards. The significance of - this paper is to put a mechanism to evaluate these projects and conclude the relative weight of design Standards for urban spaces in El-Khazendar square, which were previously deducing from the previous research entitled "Design Standards for urban spaces in valuable areas" to be considered it when designing this kind of projects. Source


Tawfik M.Y.,El Shorouk Academy
Journal of Engineering and Applied Science | Year: 2012

Egypt is abundant with heritage from consecutive historic eras, whose authenticity has been tributed by the whole world. However the unoptimal use of such heritage and the use of the traditional concept of maintenance and restoration that focuses on the archaeological building as a separate structure without taking into consideration that the urban surrounding it an important and fundamental element having a strong impact on the success of the maintenance process and re-use, led Egypt to lose many of its valuable buildings and1 to the deterioration of the urban surroundings. Today, the authorities concerned with preserving Egyptian cultural and urban heritage are taking many strict procedures to prevent infringement and deterioration of the heritage areas. The development project of El-Khazendar square, is considered as a serious step towards achieving these national objectives witch will contribute directly in supporting tourism in Egypt The aim of this paper is to deduce standards for the design of urban spaces in the valuable areas inside Cairo. This can be achieved by studying the current condition of ElKhazendar square, then drawing out the design standards of the urban spaces in the square to determine the best treatments that fit the nature of the square as well as the Egyptian environment and its capabilities. Source


Ahmed H.M.,El Shorouk Academy
IMA Journal of Mathematical Control and Information | Year: 2015

In this paper, the controllability result of impulsive neutral stochastic functional differential equations with finite delay and fractional Brownian motion in a Hilbert space is studied. By using Banach's fixed point theorem, sufficient conditions are given for the controllability of the system. Finally, an example is given to illustrate the application of our result. © The authors 2014. Published by Oxford University Press on behalf of the Institute of Mathematics and its Applications. All rights reserved. Source


Deifalla A.,El Shorouk Academy | Ghobarah A.,McMaster University
Journal of Composites for Construction | Year: 2010

Torsion failure is an undesirable brittle form of failure. Although previous experimental studies have shown that using fiber-reinforced polymer (FRP) sheets for torsion strengthening of reinforced concrete (RC) beams is an effective solution in many situations, very few analytical models are available for predicting the section capacity. None of these models predicted the full behavior of RC beams wrapped with FRP, account for the fact that the FRP is not bonded to all beam faces, or predicted the ultimate FRP strain using equations developed based on testing FRP strengthened beams in torsion. In this paper, an analytical model was developed for the case of the RC beams strengthened in torsion. The model is based on the basics of the modified compression field theory, the hollow tube analogy, and the compatibility at the corner of the cross section. Several modifications were implemented to be able to take into account the effect of various parameters including various strengthening schemes where the FRP is not bonded to all beam faces, FRP contribution, and different failure modes. The model showed good agreement with the experimental results. The model predicted the strength more accurately than a previous model, which will be discussed later. The model predicted the FRP strain and the failure mode. © 2010 ASCE. Source


Deifalla A.,El Shorouk Academy | Ghobarah A.,McMaster University
Journal of Composites for Construction | Year: 2010

In several cases of loading and geometrical configurations, flexure beams, and girders are subjected to combined shear and torsion. Failure of a structural element under combined shear and torsion is brittle in nature. Externally bonded fiber-reinforced polymer (FRP) fabrics are currently being studied and used for the rehabilitation, repair, and retrofit of concrete structure. The objective of this study is to investigate the strengthening techniques for T-beams subjected to combined shear and torsion. Six half-scale beams-two control specimen and four strengthened beams-were constructed and tested using a specially designed test setup that subjects the beam to combined shear and torsion with different ratios. Four strengthening techniques using carbon FRPs were tested. The experimental results were reported and analyzed to assess the effectiveness of the proposed strengthening techniques. An innovative strengthening technique namely the extended U-jacket showed promising results in terms of strength and ductility while being quite feasible for strengthening. Future areas of research are being outlined. © 2010 ASCE. Source

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