Man Made Structures

Man Made Structures

1. Definition

   • Over time , human beings have become better at building structures. We know more abaut them and we have ligher and strong materials

2. Massive structures and lintels

   • The first man-made structures were carved from rock or were built by stacking rocks or other materials
   • Vaulted Structures
     • Are formed by arches and vaults using stones that are cut in such a way that the only stress they support is compression- no problem for hard stone
     • Triangular structures
       • These structures are made from bars, normally metal or wooden. The use of triangular shapes means they are easily deformed. The makes them ideal for building bridges , covered with large trusses and vertical structures.
       • Suspended structures
         • This type of structure uses cables , called suspenders which the structure hangs from. When they can be adjusted , they called tension members
         • reinforced concrete structures
           • concrete led to major advances in construction because it could be made into any shape. Concrete resists compression and with steel rebar frameworks it can also bear traction
           • Laminated Structures
             • these are formed by laminates of metal , plastic or composite material like reinforced concrete. Their curved shape and folds give them their strength
             • Pneumatic structures
               • Pneumic structures are light and easy to transport , set up and dismantle
               • Spatial and geodesic
                 • these are three-dimensional structures of bars , which combine , the proposites of voults with triangulated to create curved shapes and cover large spaces

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