Types of structures
Définition : a) Trusses
Consist of slender elements, usually arranged in triangular fashion.
Définition : b) Cables & Arches
Two other forms of structures used to span long distances are the cable and the arch. Cables are usually flexible and carry their loads in tension. Preferred than truss for span more than 150 ft (46 m). In contrast, the arch must be rigid and achieves its strength in compression.
Définition : c) Frames
Frames are often used in buildings and are composed of beams and columns that are either pin or fixed connected.
The loading on a frame causes bending of its member.
Définition : d) Surface structures
A surface structure is made from a material having a very small thickness compared to its other dimensions. Sometimes this material is very flexible and can take the form of a tent or air-inflated structure. In both cases the material acts as a membrane that is subjected to pure tension.
