Concrete road bridge multi-span girder structure - has inbuilt steel unit stiffening in reduced height support area

摘要

The load bearing structure for a bridge, esp. road bridge, is made of reinforced or prestressed concrete, in the form of a continuous girder crossing two or more spans. The structural height of the load bearing structure (10) is considerably reduced in the support area, and here it is strengthened by one or more pieces of built-in steel (12). It may have slack reinforcement in this area, and can have prestressing applied to it here. It can be made up from prefabricated girder pieces joined together by site concrete. This enables a continuous through-effect to be attained, with min. effort.