Displacement behavior of undercut anchors under tension loading and crack cycling - Comparison of single anchor tests and large-scale seismic tests

Displacement behavior of undercut anchors under tension loading and crack cycling - Comparison of single anchor tests and large-scale seismic tests Undercut anchors are used in nuclear facilities for post-installed anchorages of mechanical components in reinforced concrete structures. For ensuring component integrity in case of accidental actions such as earthquakes, anchors have to show sufficient load-bearing capacity. For assuming a stiff anchorage, permanent displacements of anchors have to be kept within narrow limits because anchor displacements directly influence load distribution and transfer of component supports. For verification of load-bearing capacity and displacement behavior of safety-relevant anchorages, approval tests according to European and German guidelines are carried out. In these tests, different loading and crack conditions as well as crack cycle collectives are investigated. In order to verify the transferability of the displacement behavior in approval tests to realistic loading, results of approval tests are compared to results of large-scale seismic tests.