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Fabrication of a Polymer Compound to Increase the Earthquake Resistance of the Building

Jalali Khales, Ali | 2020

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 52955 (06)
  4. University: Sharif University of Technology
  5. Department: Chemical and Petroleum Engineering
  6. Advisor(s): Mousavi, Abbas
  7. Abstract:
  8. Every year hundreds of thousands of lives are taken away worldwide by natural disasters such as earthquakes. Walls made of concrete blocks or bricks, are amongst the most vulnerable type of walls, which tend to collapse during an earthquake. Due to their good sound and thermal insulation properties, unreinforced masonry (URM) walls are widely used in partitioning many of the commercial and residential buildings worldwide. URM is considered one of the most common types of partition wall systems in many of the school and hospital buildings and commercial buildings.URM partition walls are known to have very low drift capacity in seismic events and the failure mechanisms are known to be mostly brittle and of catastrophic nature, during earthquake ground motion. Compared to other partitioning systems, URM walls tend to perform poorly during earthquake events, leaving many injuries, casualties, and fatalities behind even if the building frame is still standing.This dissertation elaborates on development of a novel, effective, and practical methodology for a robust out-of-plane seismic strengthening technique toward seismically upgrading URM partition walls, using a thin plaster layer of sprayable Ecofriendly Ductile Cementitious Composite (EDCC). In many of these countries, retrofit is the only option, since building replacement is not practical nor an economically feasible solution. The EDCC material can be applied in two different methods: hand troweled or pump sprayed. The thickness of the layer can vary between 10mm to 20mm, depending on the design variables.The EDCC layer is providing nearly full out-of-plane detention for the wall’s building blocks, as well as minor but uniform shear capacity enhancements for the in-plane action; therefore, holding the masonry units together from falling apart and being thrown during an earthquake generated ground motion.The newly developed high performance material is sprayable, ductile, and resilient, while being affordable, and easy to apply, with much less carbon footprint compared to other similar repair materials
  9. Keywords:
  10. Seismic Retrofit ; Fiber Reinforced Concrete ; UnReinforced Masonry Buildings (URM) ; Engineered Cementitious Composites ; Polymer Cement ; Ecofriendly Ductile Cementitious Composite (EDCC) ; Earthquake Resistance

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