Concrete Shell Roof Construction Details

Symposium on concrete shell roof construction 1957 where iv r x y is the deflection of the shell due to the determinant of this system taken equal to the moment m y at the edge x 0 assuming that zero constitutes the buckling condition of a shell 0rigidly clamped at the edge x 0 and simply v si supported along the remaining edges.

Concrete shell roof construction details. A concrete roof is exactly what it sounds like. Most concrete shell structures are commercial and sports buildings or storage facilities. For example the florida based company hurricane proof systems offers a 7 inch 18 centimeter slab of concrete in three layers. A shell structure is a thin curved membrane or slab usually made up of reinforced concrete which can function both as a roof covering and structure.

A solid slab of concrete capping the top of your house. Queen post roof truss. Exact specifications vary but most concrete roofs are several inches thick. A concrete shell also commonly called thin shell concrete structure is a structure composed of a relatively thin shell of concrete usually with no interior columns or exterior buttresses.

The bottom membrane is allowed to inflate with air sealing a thin shell of concrete between the two membranes. The shells are most commonly flat plates and domes but may also take the form of ellipsoids or cylindrical sections or some combination thereof. Three dimensional concrete shells the approach to disaster resistant home construction requires that the entire exterior shell walls floors and roofs of the house be monolithic reinforced concrete in character. Shell structure in building construction a thin curved plate structure shaped to transmit applied forces by compressive tensile and shear stresses that act in the plane of the surface.

Inflatable pneumatic formwork has been used for circular concrete shell structures. When building with concrete its very time consuming meaning curing of concrete takes long and its cost labor work is more. They are usually constructed of concrete reinforced with steel mesh see shotcrete. There are two important factors in the development of the thin concrete shell structures.

Thus they are widely used in roofs of large spans. The first factor is the shape which was was developed along the history of these constructions. The shells arise from the association between concrete and steel and are structures whose continuous curved surfaces have a minimal thickness. The construction of a reinforced concrete shell involves many problems the design and construction of forms reinforcement selection and placing concrete materials and placing and curing and decentering.

A concrete base is cast and the pneumatic membrane is attached to the top.