| 摘要 |
The invention relates to a single-part anchor body for tensioning-force transfer between threaded tensioning bars and concrete. The anchor body represented in the drawing comprises a threaded steel sleeve (1) in the centre of a cone shell (2) which opens towards the supporting surface (1). In the standing region (3), the cone shell (2) is reinforced annularly. Known single-part anchor bodies comprise thick steel plates with central threaded bore. They are sensitive with respect to thread tolerances, and, in particular on the first load-bearing thread turns, overloading and carrying-force losses occur. In order to achieve a uniform concrete-surface compressor stress, a large, uneconomical thickness is required. These disadvantages are avoided according to the invention in that a threaded sleeve is supported by a cone shell only in the upper third of its height. In the sleeve region subjected to tensile loading, there is a balanced force transfer between sleeve thread and bar thread, and, in the upper sleeve region subjected to compressive loading, the bar is clamped and this reduces sensitivity to tolerances. In the same way as high permissible part-surface compressor stresses on the standing ring, pure tensile and compressive loadings in the anchor-body elements result in savings in materials. <IMAGE>
|
