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Volume :30 Issue : 118 2012      Add To Cart                                                                    Download

Structural Study of Different Proposals for Reconstruction Methodology of Ottoman Citadel of Al-Faqeer at Al-ULA Governorate in KSA to Enhance its Structural Response and Safety Factor Against Earthquake

Auther : Abdulnaser Al-Zahrani , Yaser Abdel-Aty

This paper studies a number of alternatives for reconstruction methodology of Ottoman Citadel of Al-Faqeer at Al-ULA Governorate in Kingdom of Saudi Arabia. The preferable reconstruction methodology is the one that provides the citadel building with sufficient structural safety factor against seismic forces, which are considered the main destructive action that affected most of deficiencies and collapse in the building. This citadel is considered one the invaluable architectural heritage in KSA, which is located in one of its most fames governorates for cultural tourism. The citadel represents with other Ottoman citadels that lies along the Hajj route; part of Ottoman era in KSA. This building is currently abounded by the authorities. Full excavation works of its site and ruins still have not been carried out. Thus, this study is considered preliminary.
 The assessment among reconstruction methodologies will be based on the results of structural analysis works (static and dynamic), using computer numerical modeling technique that applies Finite Element Method (FEM).
 Three main methodologies are studied in this paper through five case studies. Through two analysis cases the first methodology studies the reconstruction of the citadel collapsed parts using the original building materials and construction technology (the authentic cases). Case-1 assumes the use of weak wooden roof that are usually found in all heritage buildings, while case-2 use more robust wooden beams for reconstructing roofs, which support on masonry arches (more stiff roofs).
 The second methodology studies through case-3 the addition of reinforced concrete (RC) beams at the inner periphery of roofs (that overlooks the courtyard) and at the locations of masonry columns (across the roof and parallel to its wooden beams).
 The third methodology studies through case-4 and case-5 the embedding of thin precast reinforced concrete slabs inside the wooden roof (to be placed above wooden beams of each roof and under the flooring). The last cases aim to provide floor roof with a diaphragm system.
 This paper provides the major scheme for structural restoration and reconstruction works of Al-Faqeer citadel and reaches good conclusions and recommendations that would help to conserve and preserve similar architectural heritage structures in KSA.
 Keywords: Al-Faqeer Citadel - Reconstruction - Structural Analysis - Diaphragm - Earthquakes.

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