Saad, D. A., A. Elyamani, M. M. Hassan, A. Mamdouh, A. Akram, A. Abd El Aziz, S. Mourad, and T. Hegazy, "Reviving Heritage: A Comprehensive Fund-Allocation Decision Support System for Restoration of Historic Buildings", International Journal of Architectural Heritage, 2025. revivingheritage2025.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. Abstract2017_conf._on_conservation_re-use_sednaoui_khazendar.pdf

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.

Elghazouli, A. Y., D. V. Bompa, S. A. Mourad, and A. Elyamani, "Seismic upgrading of shear resistance for heritage masonry using textile reinforced mortar", 18th World Conference on Earthquake Engineering, Milan, Italy, 1/7/2024.
application/pdf icon2406_elghazouli_etal_wcee2024_trm_masonry.pdf
Elyamani, A., P. Roca, O. Caselles, and J. Clapes, "Dynamic Investigation of Cultural Heritage Buildings for Seismic Safety Assessment", Handbook of Cultural Heritage Analysis, Cham, Springer International Publishing, pp. 1187 - 1220, 2022. Abstractelyamani_et_al._2022_dynamic_investigation_of_cultural_heritage.pdf

Cultural heritage buildings are prone to failures when subjected to seismic events, and recent earthquakes worldwide resulted in many losses of these buildings. Therefore, there is a need for methodologies for assessing their seismic safety that should be based on enough knowledge of the building. Here, dynamic investigation by dynamic identification testing and dynamic monitoring increase significantly the level of knowledge about the assessed building. The dynamic identification tests give global information about the dynamic properties like natural frequencies that are useful in calibrating and updating a numerical model of the building that could be used in the seismic safety evaluation. Dynamic monitoring gives the dynamic properties’ evolution in time and may be used as an early warning tool able to send alarms when meaningful changes in dynamic properties are observed. This chapter gives some considerations on the different investigation activities of dynamic identification, dynamic monitoring, numerical model updating, and seismic safety assessment of cultural heritage buildings. As an application, the case study of the historic Mallorca cathedral is discussed.

Elghazouli, A. Y., D. V. Bompa, S. A. Mourad, and A. Elyamani, "Ultimate in-plane shear behaviour of clay brick masonry elements strengthened with TRM overlays", Bulletin of Earthquake Engineering, pp. 1-43, 2023. Abstracts10518-023-01775-y.pdfWebsite

This paper studies the response of unreinforced masonry (URM) members made of hydraulic lime mortar and fired clay bricks, commonly found in heritage structures, strengthened with textile reinforced mortar (TRM) overlays. The investigation includes URM and TRM-strengthened diagonal compression tests on square panels, and relatively large-scale wall specimens subjected to combined gravity and lateral cyclic loads. Complementary compression, tension, and interface material tests are also carried out. The diagonal panel tests show that the TRM effectiveness depends in a non-proportional manner on the overlays, render thickness, and substrate strength. The enhancement in stiffness, strength, and ultimate shear strain, using one to four mesh layers on each side, is shown to vary in the range of 49–132%, 102–536%, and 300–556% respectively. It is shown that strut crushing typically governs the response of such low-strength URM masonry elements confined by TRM overlays. The cyclic tests on the comparatively larger walls show that the TRM is effective, shifting the response from URM diagonal tension to rocking, and enhancing the stiffness, strength, and ultimate drift capacity by more than 160%, 30%, and 130%, respectively. It is shown that analytical assessment methods for predicting the response of TRM-strengthened and URM members in terms of stiffness, strength and load-deformation can be reliably adapted. The cumulative contribution of the URM and TRM components, in conjunction with a suitable fibre textile strain, is also found to offer an improved prediction of the shear strength compared to codified procedures. The findings enable the evaluation and improvement of analytical models for determining the main inelastic response parameters of TRM-strengthened masonry and provide information for validating future detailed nonlinear numerical simulations.

Saad, D. A., M. M. Hassan, A. Elyamani, A. Mamdouh, S. Mourad, and T. Hegazy, "Prioritization of Heritage Buildings in Historic Cairo for Restoration Funding", International Journal of Advances in Structural and Geotechnical Engineering, vol. 07, issue 01, pp. 20-28, 2023. asge_volume_07_issue_01_pages_20-28_1.pdf
Elyamani, A., A. Reda, M. Abdel-Hafez, S. Mourad, and M. M. Hassan, "Characterization of Construction Materials of the Historic Structures in Historic Cairo: A Case Study", International Journal of Conservation Science, vol. 14, issue 2, pp. 599-616, 2023. ijcs-23-40_elyamani.pdf
application/pdf iconijcs-23-40_elyamani.pdf
Bakkar, A. R., A. Elyamani, A. G. El-Attar, D. V. Bompa, A. Y. Elghazouli, and S. A. Mourad, "Dynamic Characterisation of a Heritage Structure with Limited Accessibility Using Ambient Vibrations", Buildings, vol. 13, no. 1, 2023. AbstractWebsite

Historic Cairo has been a UNESCO World Heritage Site since 1979. It has more than 600 historic structures, which require extensive studies to sustain their cultural, religious, and economic values. The main aim of this paper is to undertake dynamic investigation tests for the dome of Fatima Khatun, a historic mausoleum in Historic Cairo dating back to the 13th century and consisting of mainly bricks and stones. The challenge was that the structure was difficult to access, and only a small portion of the top was accessible for the attachment of accelerometers. Current dynamic identification procedures typically adopt methods in which the sensors are arranged at optimal locations and permit direct assessment of the natural frequencies, mode shapes, and damping ratios of a structure. Approaches that allow for the evaluation of dynamic response for structures with limited accessibility are lacking. To this end, in addition to in situ dynamic investigation tests, a numerical model was created based on available architectural, structural, and material documentation to obtain detailed insight into the dominant modes of vibration. The free vibration analysis of the numerical model identified the dynamic properties of the structure using reasonable assumptions on boundary conditions. System identification, which was carried out using in situ dynamic investigation tests and input from modelling, captured three experimental natural frequencies of the structure with their mode shapes and damping ratios. The approach proposed in this study informs and directs structural restoration for the mausoleum and can be used for other heritage structures located in congested historic sites.

Hassan, M. M., A. Elyamani, and S. A. Mourad, "Seismic vulnerability assessment of buildings: case study of Al Khalifa district, Fatimid Cairo", SN Applied Sciences, vol. 4, issue 11, pp. 310, 2022. AbstractWebsite

This work intends to provide seismic vulnerability analysis for a building stock in Al Khalifa District, Fatimid Cairo while focusing on the historic buildings in the area. The work represents part of an interdisciplinary study targeting the management and conservation of a UNESCO World Heritage Site. The project inspects several aspects including behavior of masonry walls, structural health monitoring of selected structures, conservation studies, in addition to influence of rising ground water. In the current study, seismicity of Egypt generally and Cairo specifically is reviewed. Afterwards, large-scale seismic vulnerability is adopted to calculate the vulnerability index for buildings within the study area. Data are collected through extensive on-site surveys for more than one hundred buildings. Observed typologies are listed alongside possible mechanisms of failure. Egypt has moderate seismic hazard; however, many buildings are prone to damage due to inadequate seismic design. This leads to retrofitting requirements to reduce seismic vulnerability and adhere to imposed seismic requirements in design codes. The study is intended to understand seismic risk of buildings within study area as part of a comprehensive study. Developed vulnerability map show that many buildings are prone to damage during seismic events.