Model predictions turned out to be, on average, 20% lower than the results of experiments performed on cast-in anchor groups borrowed from literature. The model is based on five mechanical assumptions, which were established from a wide-ranging numerical analysis. The model hence allows the structural designer to predict the shear strength of an anchor group post-installed into concrete. The paper provides an analytical model for predicting the maximum (ultimate) shear force that an anchor group can bear, thus called “shear strength”. The paper focuses on the transverse forces that can be transmitted across an anchor group from an attachment to the concrete.
Being post-installed, rather than cast-in, the embedded end of each anchor is not hooked, and no nuts, washers, or plates are attached to the embedded shaft. The anchor group is far from the edges and is subjected to no more than marginal axial forces. This paper is devoted to the fastening system that consists of a number of anchors of approximately equal effective embedment depth, called “anchor group”, embedded into hardened concrete, used to transmit forces transverse to the anchors from an attachment to the concrete.
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