Tensioning element, in particular for the suspension of building components, and also a method for the manufacture thereof

Abstract

A tensioning element ( 1 ), especially for the suspension of building components, is provided with a number of wires ( 3 ) arranged approximately in parallel forming a wire cable ( 2 ). These wires ( 3 ) are anchored at each end in an end piece ( 6 ) absorbing the tensile forces exerted on the wire cable. The end piece ( 6 ) is at least partly provided with a plastic deformable sheath ( 6 b ) which serves to house one end of a wire cable, where this sheath ( 6 b ) is compressible with the end of the wire cable. This enables rapid anchoring of the wire cable in the end piece and this guarantees a high breaking load.

1 . Tensioning element, especially for the suspension of building components, with a number of wires ( 3 ) arranged approximately in parallel forming a wire cable ( 2 ), the ends of said wires each being anchored in an end piece ( 6 ) absorbing the tensile forces exerted on the wire cable ( 2 ), characterised in that 
 the end piece ( 6 ) is provided at least partially with a plastic deformable sheath ( 6   b ) serving to accommodate one end of a wire cable, where this sheath ( 6   b ) can be compressed with the end of the wire cable.    
     
     
         2 . Tensioning element according to  claim 1 , characterised in that the wire cable ( 2 ) is formed from a number of wires ( 3 ), preferably between seven and several hundred, arranged in parallel with each other, displaying a straight form.  
     
     
         3 . Tensioning element according to  claim 1  or  2 , characterised in that the wires ( 3 ) made from high-strength steel can be used to a nominal strength of approx. 1800 N/mm 2 .  
     
     
         4 . Tensioning element according to one of  claims 1  to  3 , characterised in that the wires ( 3 ) are bundled in such a way that a wire cable ( 2 ) with an approximately circular cross section is formed, where means ( 4 ,  5 ) to maintain the round cross section over the entire length of the wire cable ( 2 ) are provided.  
     
     
         5 . Tensioning element according to  claim 4 , characterised in that the means consist of retaining rings ( 4 ,  5 ) spaced apart from each other, distributed over the entire length of the wire cable ( 2 ).  
     
     
         6 . Tensioning element according to  claim 4 , characterised in that the means are formed by banding.  
     
     
         7 . Tensioning element according to one of the  claims 4  to  6 , characterised in that the sheath ( 6   b ) housing the end of the wire cable having a round cross section is radially compressible in the plastic deformation.  
     
     
         8 . Tensioning element according to one of  claims 1  to  7 , characterised in that the wire cable ( 2 ) is formed from wires ( 3 ) displaying the same diameter.  
     
     
         9 . Tensioning element according to one of  claims 1  to  7 , characterised in that the tensioning element ( 1 ) is provided as a stay cable or bridle chord for a cable-stayed bridge.  
     
     
         10 . Method of manufacture of a tensioning element according to one  claims 1  to  9 , characterised in that for the production of the wire cable ( 2 ) the wire ( 3 ) is drawn through a straightener during pay-out from a wire coil in order to obtain a straight form, that the wires ( 3 ) are next stretched, preferably individually, and thereafter bundled together into a wire cable ( 2 ), which is then compressed at the ends with an end piece ( 6 ).  
     
     
         11 . Method of manufacture of a tensioning element according to  claim 10 , characterised in that the wire cable ( 2 ) is formed into an approximately circular cross section.