Recently, it has become increasingly important to instigate more widespread seismic retrofitting for seismically weak structures in Japan, which is frequently subject to massive earthquakes. Generally, post-installed anchors are used to connect the seismic retrofitting members to existing members. However, no computational models of post-installed anchors have yet been proposed in previous studies to evaluate stress-displacement relationships. Accordingly, we developed a new mechanical model for postinstalled anchors. In this model, the kinking behavior of anchor bolts, bearing behavior of concrete, and tensile behavior of anchor bolts are considered. The proposed model can reasonably simulate the mechanical behaviors of the previous test results.
