Moment Resisting Connections with Post-Installed Reinforcement Bars

摘要

As a result of the increasing need for rehabilitation and upgrade of existing structures, post-installed reinforcing bars in concrete are rapidly gaining in importance. For such applications, the Hilti HIT injection system has proved to be reliable. Only straight ends of bars can be installed for post-installed bars. For such a frame node a design concept with strut-and-tie model, based on Eurocode 2, is presented. A series of 18 tests on full scale specimens with cast-in hooked and straight bars and post-installed connection bars has been performed. The anchorage depth, the concrete strength and the reinforcement ratio have also been varied. The test results are evaluated in this paper with respect to the strut-and-tie model.