Reinforcing element for built-ins in concrete constructions

Abstract

Construction elements ( 21 ) are disclosed which allows potential weaknesses of a concrete structure ( 10 ) caused by recessed parts ( 20 ), e.g. media lines, to be nearly or fully eliminated. Said construction elements ( 21 ) consist of two anchoring devices ( 2 ) and an intermediate draw bar ( 2 ). A mounting device ( 4 ) is fixedly or removably provided in the area of the draw bar such that the hollow space for running the media lines, for example, is defined. The disclosed construction elements ( 21 ) can be integrated in the planning phase and/or shortly before casting the concrete.

1 . A device for strengthening concrete structures, which bridges weakened zones using structural elements which can be inserted locally, wherein, in addition to the conventional reinforcement, and before pouring in the concrete, built-ins ( 20 ) are enclosed by at least one structural element ( 1 ) which transmits the forces, and hence improves the concrete construction weakened by said built-ins ( 20 ), in that said structural element ( 1 ) increases the local static shear-carrying capability in the region of said built-ins ( 20 ), wherein said structural element ( 1 ) generates at least one force model which forms force-neutral zones ( 31 ) for said built-ins ( 20 ), said zones defining the position of said built-ins ( 20 ), as a result of which the weakenings caused to the concrete construction by said built-ins ( 20 ) are at least minimized. 
     
     
         2 . The device according to  claim 1 , wherein said structural element ( 1 ) consists of a TC structural element ( 21 ) which forms at least one TC force model ( 40 ) which consists of at least one compression zone ( 32 ) and at least one tension zone ( 33 ). 
     
     
         3 . The device according to  claim 1 , wherein said structural element ( 1 ) consists of an SB structural element ( 22 ) which forms at least one SB force model ( 41 ) which consists of at least one M-Q zone ( 37 ), and absorbs bending moments ( 34 ) and shear forces ( 36 ). 
     
     
         4 . The device according to  claim 1 , wherein said structural element ( 1 ) consists of an HS structural element ( 23 ) which forms at least one HS force model ( 42 ) which consists of at least one horizontal shear zone ( 35 ). 
     
     
         5 . The device according to  claims 2  and  4 , wherein said structural element ( 1 ) forms a force model which consists of at least one TC force model ( 40 ) and at least one HS force model ( 42 ). 
     
     
         6 . The device according to  claims 3  and  4 , wherein said structural element ( 1 ) forms a force model which consists of at least one SB force model ( 41 ) and at least one HS force model ( 42 ). 
     
     
         7 . The device according to  claim 1 , wherein said structural element ( 1 ) comprises at least one tension element ( 2 ). 
     
     
         8 . The device according to  claim 7 , wherein said structural element ( 1 ) has at least one tension element ( 2 ) and at least one holder ( 4 ). 
     
     
         9 . The device according to  claim 8 , wherein said structural element ( 1 ) has at least one tension element ( 2 ), at least one holder ( 4 ) and at least one anchor ( 3 ). 
     
     
         10 . The device according to  claims 1  and  3 , wherein said structural element ( 1 ) consists of at least one anchored and bending-resistant element ( 6 ). 
     
     
         11 . The device according to  claim 10 , wherein said bending-resistant element ( 6 ) forms a frame ( 7 ). 
     
     
         12 . The device according to  claim 1 , wherein at least two structural elements ( 1 ) are connected to one another by at least one connector ( 5 ,  5 ′). 
     
     
         13 . The device according to  claim 12 , wherein said connector or connectors is or are arranged between at least two structural elements ( 1 ) along the force-neutral zone ( 31 ). 
     
     
         14 . The device according to  claim 12 , wherein said connectors ( 5 ,  5 ′) are arranged between at least two structural elements ( 1 ) transversely with respect to the force-neutral zone ( 31 ). 
     
     
         15 . The device according to  claim 12 , wherein said connectors ( 5 ,  5 ′) are arranged between at least two structural elements ( 1 ) along the force-neutral zone ( 31 ) and transversely with respect to the force-neutral zone ( 31 ).