2019 Volume 30 Pages 11-20
The authors studied cylindrical shear-keys for use instead of concrete roughening for seismic retrofitted joints. Assuming actual construction, combined use of post-installed anchors and cylindrical shear-keys was investigated. The ultimate purpose of the study was to elucidate the mechanical behavior of such combination and to propose a mechanical model. In this paper, the test results are organized for each failure model (bearing failure, shear-off failure), and a mechanical model of cylindrical shear-keys including the post-peak area is proposed. The mechanical model was shown to be capable of largely satisfactory reproduction of the test results.