Elyamani, A., O. Caselles, P. Roca, and J. Clapes, "INTEGRATED DYNAMIC AND THERMOGRAPHY INVESTIGATION OF MALLORCA CATHEDRAL", Mediterranean Archaeology and Archaeometry, vol. 18, issue 1, pp. 221-236, 2018. 17_elyamani_et_al._181_published_file.pdf
Elyamani, A., M. S. El-Rashidy, M. Abdel-Hafez, and H. G. - E. Rab, "A CONTRIBUTION TO THE CONSERVATION OF 20TH CENTURY ARCHITECTURAL HERITAGE IN KHEDIVAL CAIRO", International Journal of Conservation Science, vol. 9, issue 1, pp. 55-70, 2018. ijcs-18-05_elyamani.pdf
Adel, A., N. Mohamed, N. Abdel-Maksoud, M. Sobhy, D. Hossam, and A. Elyamani, "On the conservation and re-use of Sednaoui El-Khazender historical building in Attaba", The First Arab Conference for Restoration and Reconstruction, Cairo, Egypt, 9-11October 2017. Abstract

This research paper deals with Sednaoui El-Khazender building which is one of the unique buildings in Cairo dating back to the beginning of the 20th c. It was designed by the famous French Architect Eiffel. The building was visually inspected and the different signs and symptoms of damage were identified. Intervention techniques were proposed for the restoration of the building. A proposal for the rehabilitation of the building is discussed aiming at maximizing the economic benefits of the building.
يتناول هذا البحث أحد المباني ذات الطراز المعماري الفريد وهو مبنى صيدناوي الخازندار بمنطقة العتبة، والذي يرجع تاريخ تشييده إلي أوائل القرن العشرين، وصممه المعماري الفرنسي الشهير إيفل (مصمم برج إيفل بباريس). تمت معاينة المبنى وتشخيص أهم مظاهر وعوامل التلف المؤثرة عليه، ثم تم وضع اقتراحات الترميم والعلاج. لتعظيم الإستفادة الإقتصادية من المبنى فقد تم وضع مقترحات لتأهيله وإعادة إستخدامه بما يتوافق مع محيطه العمراني وقيمته المعمارية الكبيرة.

Salah, E., and A. Elyamani, "Employing of three dimensional virtual shows in the re-use of historical structures and sites", The First Arab Conference for Restoration and Reconstruction, Cairo, Egypt, 9-11October 2017. Abstract

Historical structures and sites are among the important touristic attractions if they are properly managed and exploited. Rehabilitation is one of the important approaches of their re-use. This paper is throwing the light on one of the modern techniques in the rehabilitation which is the three dimensional (3D) virtual shows. The paper presents an inventory about three of these shows including: 3D cinema; 3D shows using projection maps and hologram. This new technique is an out-of-the-box idea in rehabilitation which doesn’t increase the loads on the historical structure since it depends on light and small size devices. As well، this new rehabilitation technique is interesting in attracting new class of visitors for historical structures and sites، i.e. children who are helped via this technique in exploring their history in an attractive way. The paper is written in Arabic since there is a lack in the Arabic literature about these rehabilitation techniques.
إن التكنولجيا سهلت الحياة كثيراً وجعلت ما كان مستحيلاً في الماضي متاحاً للجميع الآن ، ولكن هل يمكن أن تفيدنا التكنولجيا يوماً في مجال تأهيل المباني والمواقع الأثرية؟ لقد حاول العلماء كثيراً أن يسافروا بخيالهم لاختراع ما يسمي بآلة الزمن. فميل الانسان لان يعيش زمن غير زمنه متأصل في فطرته فهل يمكن الرجوع للماضي عن طريق المستقبل لإرضاء فطرة الانسان وفضوله؟ إن فكرة البحث بنظرة أوسع تعتمد علي وجود آلة الزمن في كل مبني أو موقع أثري، واله الزمن بالنسبة لهذا الموضوع هي العروض التخيلية ثلاثية الابعاد والتي أضحت من ضمن التقنيات الحديثة التي يتم الإعتماد عليها في تأهيل وإعادة إستخدام المباني والمواقع الأثرية. ولهذا مردود إقتصادي جيد للسلطات المالكة لهذه الآثار حيث أن الدراسات الإقتصادية واستطلاعات الرأي توضح أن أعداد الداخلين يومياً الي دور السينمات تساوي اضعاف أعداد الداخلين لأشهر المباني الاثرية في العالم. ويسلط البحث الضوء على ثلاث من التقنيات المختلفة التي يتم إستخدامها في هذه العروض وهي: السينما ثلاثية الأبعاد؛ والعرض ثلاثي الأبعاد بطريقة خرائط الإسقاط؛ والهولوجرام. وتظهر أهمية هذه التقنية في الخروج من الدائرة المغلقة لفكرة التأهيل وإعادة التوظيف للمباني الاثرية التقليدية عن طريق تقليل الأحمال الواقعة علي المبنى والناتجة عن إعادة التوظيف التقليدية نظراً حيث أن الوظيفة الجديدة باستخدام هذه التقنية تعتمد علي استخدام أجهزة خفيفة الوزن مستغلة الفراغ والعالم الافتراضي. وكذلك تجذب هذه التقنية فئات جديدة للإستمتاع بالمباني والمواقع الأثرية وهم الأطفال لأن هذه التقنية تساعدهم في معرفة تاريخهم بطريقة شيقة ومبسطة.

Caselles, J. O., J. Clapes, P. Roca, and A. Elyamani, "Approach to Seismic Behavior of Mallorca Cathedral", 15th World Conference of Earthquake Engineering, Lisbon, Portugal, 24-28 September , 2012. Abstractapproach_to_seismic_behavior_of_mallorca_cathedral.pdf

The paper presents the current state of an on-going research aimed at characterizing the seismic response of Mallorca cathedral. Mallorca cathedral is an audacious Gothic structure built in the island of Mallorca during 14th-16th centuries, characterized for its large dimensions and slender structural members. So far, experimental and numerical modal analysis, in addition to tentative model updating and seismic analysis, have been performed. The dynamic identification tests have been carried out by ambient vibration testing, while the frequency domain decomposition (FDD) technique has been used to obtain the modal parameters. A 3D Finite Element (FE) model has been used to determine the vibration modes. The model has been updated by modifying some structural parameters to improve the matching between experimental and numerical modal parameters. Once updated, the model has been utilized to study the seismic response of the cathedral using non-linear static pushover analysis. Conclusions on the possible collapse mechanisms and the seismic performance of the structure are presented.

Elyamani, A., P. Roca, O. Caselles, and J. Clapes, "Seismic safety assessment of historical structures using updated numerical models: The case of Mallorca cathedral in Spain", Engineering Failure Analysis, issue 74, pp. 54-79, 2017. AbstractWebsite

The paper presents an integrated approach aimed at assessing the seismic safety of Mallorca cathedral. This cathedral is an extraordinary historical construction dating back to the middle ages. The experimental modal parameters of the cathedral were identified using Ambient Vibration Testing (AVT). The cathedral numerical model was updated using the identified modal parameters. This updated model was then used to study the seismic response of the cathedral using non-linear static (pushover) analysis. A sensitively analysis was carried out to reveal the dependency of the seismic capacity on the input materials properties. To assess the seismic performance and the safety of the cathedral, the N2 method was employed. It was found that the cathedral is safe when subjected to the earthquakes expected in Mallorca Island.

Elyamani, A., "Conservation-Oriented Structural Analysis of the Spire of Barcelona Cathedral", International Journal of Materials Science and Applications , vol. 5, issue 6-2, pp. 1-9, 2016. AbstractWebsite

The spire of Barcelona cathedral suffered from severe problems due to the corrosion of the steel ties used in reinforcing its stone masonry beams. Wide visible cracks were noticed in the stone beams and large parts were detached. Therefore, the full spire was dismantled and reconstructed using titanium ties to eliminate the corrosion problem. A finite element model of the spire was created and analyzed using DIANA software to support this decision. This analysis helped in understanding the role and strength contributions of these ties in resisting the applied loads on the spire, specifically, the lateral loads of earthquakes and wind. A nonlinear static (pushover) analysis was carried out to assess the spire capacity under the lateral loads. A number of constitutive models for modeling the masonry behavior were tried. Also, a number of seismic actions patterns were considered. As a main conclusion of this study, the ties were highly needed to carry the tensile stresses caused by earthquakes and wind loads. Therefore, in the reconstruction of the spire, such ties must be kept in the masonry beams.

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