Behavior and Design of Post-Installed Rebar Connections under Temperature

Abstract:

Typical applications for post-installed rebar connections consist in overlapping joints with existing reinforcement or anchoring of the reinforcement at a slab or beam support. At cold state it may be shown by testing that a post-installed rebar system can develop the same bond resistance with the same safety margin as cast-in-place rebar. Consequently, anchorage length and lap length for post-installed rebars can be calculated as for cast-in-place according to the Eurocode 2 provisions. However, when subjected to temperature, the decay in bond properties for post-installed systems is significantly more dramatic than for cast-in-place rebars. The paper presents the result of an experimental campaign carried out on a post-installed connection using a vinylester polymer, investigating the effects on the bond strength both of the temperature and of different testing conditions. Finally, design criteria are provided and applied to a typical case study consisting in a post-installed solid slab.

• Periodical: Key Engineering Materials (Volume 711)
• Pages: 783-790
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.711.783
• Online since: September 2016
• Authors: Giovanni Muciaccia*, Andrea Consiglio, Gianpaolo Rosati
• Keywords: Bond Properties, Post-Installed Rebar, Temperature

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