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Investigation on Seismic Behavior of Old Masonry Structure (A case study of Daniel historical sanctuary)

Khoshnevis Hosseini, Arash | 2016

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  1. Type of Document: M.Sc. Thesis
  2. Language: English
  3. Document No: 50248 (53)
  4. University: Sharif University of Technology, International Campus, Kish Island
  5. Department: Science and Engineering
  6. Advisor(s): Khalou, Alireza
  7. Abstract:
  8. Masonry structures are complex systems that require a thorough and detailed knowledge for analysis and designing, and especially maintaining their capability. Since the old historical masonry structures have cultural value, maintenance of such structures against natural disasters that cause destruction is important. The goal of this research is to find a method for protection of the historical masonry structure of Daniel shrine that is located in susa region in Khuzestan. According to the reference structures of architectural heritage, a number of challenges in conservation, diagnosis, analysis, monitoring, repair and strengthening are presented that limit the application of modern codes and building standards. Recommendations are desirable and necessary to both ensure rational methods of analysis and intervention methods appropriate to the cultural context. However, modeling a real structure to a robust quantitative (mathematical) representation is a very difficult, complex and computationally demanding task. This research investigates one of the effective mechanism for improving seismic behavior of old masonry structures. Achievement of this research is to design a supporting structure using strengthening of old structure with modern material like CFRP for controlling the displacement of masonry structure so that the structure of masonry will not experience even minor deformation .The entire process is illustrated using case study from Daniel historical sanctuary which is one of the valuable old masonry located in Susa region built 160 years ago. In this research first, the Daniel masonry sanctuary is investigated based on the field evaluations for vulnerability level determination, according to 376 strengthening design codes and standard No. 2800, Iranian codes. According to the fast qualitative evaluations, its vulnerability level falls within medium level and percent of vulnerability is calculated as 93.2 based on the detailed qualitative evaluations. Also, according to the standard No. 2800, Daniel shrine is classified as highly important building. Moreover, it is classified as cultural heritage first level building based on the seismic classification of existing buildings, NO. 23155/7489-1379/05/03. Then, Daniel structure is modeled using ABAQUS software via the extensive field provided information of recent geotechnical investigation reports such as material strength test results. It should be noted that material strength test results are compared with standard values regulations. After modeling, the vulnerable locations in structure are identified. Most of vulnerable locations were in the shrine dome and therefore these places were strengthened using CFRP laminates in the model. Finally results of the model with CFRP strengthening are compared with the results of present condition of structure model. In the present model, displacement of x-axis, y-axis and z-axis, are 40 millimeters and 19 millimeters and -50 millimeters respectively. In the strengthened model with CFRP, displacements of shrine dome have reduced by about 80%. So the behavior of strengthened structure with CFRP laminates is improved and Daniel historical sanctuary can resist seismic loads
  9. Keywords:
  10. Masonry Buildings ; Historic Structures ; Strengthening (Metal) ; Carbon Fiber Reinforced Polymer (CFRP) ; Daniel Shrine ; Displacement Controlling

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