Folded plate structure

2.  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. 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. 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. 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. The concept of stiffness generation

7. 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.
Structural Condition Of Folding Structures.

8. Based on geometric shape folded
structures can be divided into:
 Folded plate surfaces structures
 Folded plate frames structures
 Spatial folded plate structures

9. 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.  As Roof Structure  As Wall Structure
 As Steel Sheet Piles As Floor Structure
MiamiMarineStadium,
Florida
ChurchofNotre
Dame
deRoyan,France
Mezzanineceilingcalled
"Kielsteg"
SecuringThe
Foundation
PitWithLarsenPlanks

11.  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. Air Force Academy Chapel, USA
Architect: Walter Netsch,
Length: 280 ft, Height: 150 ft, Width: 84 ft,
Year: 1962

13. Yokohama International Passenger Terminal,
Architect: Alejandro Zaera-Polo & Farshid
Moussavi
Floor Area: 34,732 m2,
Length: 430m, Height: 15m, Width: 70m

14. Bangabandhu Sheikh Mujibur Rahman Novo
Theatre,
Architect: Ali Imam,
Year: 2004,
Seating capacity: 275 people

15. Kamalapur Rail
Station
Bangladesh National
Museum
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16. Mausoleum Of Three LeadersMohakhali Bus Terminal
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