POST-INSTALLED STRUCTURAL REBAR

Hilti Qatar Engineering Solutions


The primary task of structural rebar in reinforced concrete is to carry tensile loads and avoid brittle concrete failure. Reinforced concrete design assumes that concrete has negligible tensile strength but allows for the design of rebar development length with the following two situations:
  • Transferring tensile loads from one bar to another (overlap splice)
  • Development length of the tensile force in a bar beyond a node in equilibrium
Post-installed rebar connections designed as part of a structural system must be designed as carefully as the entire structure. European Technical Approvals prove that in static load situations, post-installed rebars behave like cast-in bars.

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French DTA approvals delivered by CSTB, a member of EOTA, recognises Hilti HIT-RE 500-SD and
HIT-HY 200 injectable mortars as products qualified for structural rebar applications in seismic zones

By applying engineering judgment, engineers can use this French approval when designing seismic structural post-installed rebar connections.
Included in the DTAs:
  • The design bond strength fbd,seism of Hilti mortars considered for use in seismic zones.
  • Formatted data for design with Eurocode 2 and Eurocode 8.
  • Application limit information (e.g. transverse reinforcement, settings instructions)
Design is further simplified by Hilti’s own PROFIS software, which allows users to design rebar connections easily and in accordance with the state-of-the art seismic code framework.

More information about PROFIS Rebar Software

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