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Folded plate structure

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Folded plate structure

  1. 1. Folded Plate Structure A Concept That Every Civil Engineer Should Know About… Md. Al-Mobin Shah Masum B. Sc. in Engineering (Civil), UAP, 2016
  2. 2. Outline  Definition  Folding Systems in Nature  The Principle of Folding  The Basic concept of Folding  Structural Behavior of Folding  Types of Folded Structure  The Application of Folded Structures  Advantages and Disadvantages of Folded-Plate Structure  Some Real Life Examples of Folded Plate Structure  Recommendation
  3. 3. Definition Folded plates are assemblies of flat plates rigidly connected together along their edges in such a way that the structural system capable of carrying loads without the need for additional supporting beams along mutual edges. Engineer Eudene Freyssinet performed the first roof with the folded structure in 1923 as an aircraft hangar at Orly Airport in Paris.
  4. 4. Folding Systems in Nature The principle of folding as a tool to develop a general structural shape has been known for a long time. Folded structure systems which are analogous to several biological systems such as found at broadleaf-tree leaves, petals and foldable insect wings, are adopted to be employed in a new, technical way. Leaf of Palm Tree Beetle Insect With Foldable Wings Seashell
  5. 5. The Principle of Folding The structural characteristics of folding structures depend on-  The pattern of the folding.  Their geometrical basic shape.  Its material.  The connection of the different folding planes.  The design of the bearings.
  6. 6. The Basic concept of Folding The concept of stiffness generation
  7. 7. Structural Behavior of Folding Structural Condition Of Folding Structures. Load Distribution process :  At first, the external forces are transferred to the shorter edge of one folding element.  There, the reaction as an axial force is divided between the adjacent elements.  Then the forces transferred to the bearings.
  8. 8. Types of Folded Structure Based on geometric shape folded structures can be divided into:  Folded plate surfaces structures  Folded plate frames structures  Spatial folded plate structures
  9. 9. Types of Folded Structure Classification of folded structures based on the material they are made of:  Folded structures made of reinforced concrete  Metal folded structures  Folded structures of wood  Folded structures of glass  Folded structures of plastic materials  Folded constructions made in combination of different materials
  10. 10. The Application of Folded Structures  As Roof Structure  As Wall Structure  As Steel Sheet Piles As Floor Structure MiamiMarineStadium, Florida ChurchofNotreDame deRoyan,France Mezzanineceilingcalled "Kielsteg" SecuringTheFoundation PitWithLarsenPlanks
  11. 11. Advantages and Disadvantages of Folded-Plate Structure  Advantages:  Very light form of construction. To span 30 m shell thickness required is 60 mm only.  The use of concrete as a building material reduces both materials cost and a construction cost.  Longer span can be provided.  Flat shapes by choosing certain arched shapes.  Esthetically it looks good over other forms of construction.  Disadvantages:  Shuttering is difficult.  Greater accuracy in formwork is required.  Good labor and supervision necessary.  Rise of roof may be a disadvantage.
  12. 12. Air Force Academy Chapel, USA Architect: Walter Netsch, Length: 280 ft, Height: 150 ft, Width: 84 ft, Year: 1962 Source: en.wikipedia.org/wiki/United_States_Air_Force_Academy_Cadet_Chapel Some Real Life Examples of Folded Plate Structure
  13. 13. Yokohama International Passenger Terminal, Architect: Alejandro Zaera-Polo & Farshid Moussavi Floor Area: 34,732 m2, Length: 430m, Height: 15m, Width: 70m Source: www.osanbashi.com/en/outline/features.html Some Real Life Examples of Folded Plate Structure
  14. 14. Bangabandhu Sheikh Mujibur Rahman Novo Theatre, Architect: Ali Imam, Year: 2004, Seating capacity: 275 people Source: www.novotheatre.gov.bd Some Real Life Examples of Folded Plate Structure
  15. 15. Kamalapur Rail StationBangladesh National Museum More In Bangladesh: Some Real Life Examples of Folded Plate Structure
  16. 16. Mausoleum Of Three LeadersMohakhali Bus Terminal More In Bangladesh: Some Real Life Examples of Folded Plate Structure
  17. 17. There are many homeless people in Bangladesh. Specially during disaster, many people become homeless. We can use the concept of folded plate structure to make portable shelter for the homeless people. Significant works on this project is already in progress. It is very cheap and easily useable by anyone. We just have to adopt it for our people. reCover Accordion Shelter Light Weight Emergency Shelter Recommendation
  18. 18. The concept of Folded plate system is a wonderful gift of nature to us. We should use this concept for more innovative ways to improve our structures. And Last…

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