Conservation-Oriented Structural Analysis of the Spire of Barcelona Cathedral
Issue:
Volume 5, Issue 6-2, December 2016
Pages:
1-9
Received:
13 May 2016
Accepted:
22 July 2016
Published:
3 September 2016
DOI:
10.11648/j.ijmsa.s.2016050602.11
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Abstract: 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.
Abstract: 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 fin...
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Preventive Conservation of Historic Textile from the Ultraviolet Degradation due to Light Exposure in Egyptian Museums
Harby E. Ahmed,
Sameh M. Reda,
Dina Yehia,
Yassin Ziddan
Issue:
Volume 5, Issue 6-2, December 2016
Pages:
10-14
Received:
16 July 2016
Accepted:
19 July 2016
Published:
3 September 2016
DOI:
10.11648/j.ijmsa.s.2016050602.12
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Abstract: Historic Textiles are safer from light degradation when exposed to ultraviolet radiation emit from different kind of illumination either natural or artificial in uncontrolled and poor Egyptian museums. This article is present an experimental study of using different materials as coating in order to reduce the UV amount on display of historic textiles. Different kinds from glass of showcases in some Egyptian museum were tested against to UV. Transmittance of six samples of different thickness of Perspex that used in showcases at Egyptian museums was studied as will. Two compounds Titanium dioxide and zinc oxide are studied as coating materials on commercial glass with thinks 3mm and 5mm. Twenty four samples was prepared for each compound. Coated glass exposed to artificial Ultraviolet source to study their protection. Also, non-coated glass was used as a blank sample and assessments have been done. The transmittance of output of the samples obtained through the spectral transmittance of each sample, given that the maximum transmittance was for air.
Abstract: Historic Textiles are safer from light degradation when exposed to ultraviolet radiation emit from different kind of illumination either natural or artificial in uncontrolled and poor Egyptian museums. This article is present an experimental study of using different materials as coating in order to reduce the UV amount on display of historic textil...
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Natural Bed of Masonry Stones and Its Effect on the Stability of Wall Stucco Decoration in Historical Buildings
Mohamed Atyia Hawash,
Hala Afifi Mahmoud,
Mohamed Abd El Motelb Etman
Issue:
Volume 5, Issue 6-2, December 2016
Pages:
15-21
Received:
31 August 2016
Accepted:
21 October 2016
Published:
17 January 2017
DOI:
10.11648/j.ijmsa.s.2016050602.13
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Abstract: The paper aims to achieve Proper knowledge of the properties of stone and understanding deterioration factors and deterioration mechanisms are necessary for successful maintenance, protection and suitable conservation interventions. avoiding technical errors that occur during building up the building. These technical errors cause stucco decoration falling. samples from the building (Mohamed Ali house) stone blocks and Crystalline salts are Analyzed by X-ray diffraction & X-ray fluorescence. To be able to interpret the wall damage accurately. Results showed that Halite salt efflorescence occur in vertically stone bedding plane. thermal expansion coefficient of a salt exceeds the surrounding rock stone weathering Exfoliation occur. So incorrect position for building stones, Not perpendicular to Bedding Plane of Sedimentary rocks, This problem must be avoided because its harmful effect to the Stability of Wall Stucco Decoration in Historical Buildings.
Abstract: The paper aims to achieve Proper knowledge of the properties of stone and understanding deterioration factors and deterioration mechanisms are necessary for successful maintenance, protection and suitable conservation interventions. avoiding technical errors that occur during building up the building. These technical errors cause stucco decoration ...
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