000020232 001__ 20232
000020232 005__ 20170118182401.0
000020232 04107 $$aeng
000020232 046__ $$k2017-01-09
000020232 100__ $$aKerkhof, Klaus
000020232 24500 $$aExperimental Investigations on Seismic Behavior of Post-Installed Anchorages in Nuclear Power Plants

000020232 24630 $$n16.$$pProceedings of the 16th World Conference on Earthquake Engineering
000020232 260__ $$b
000020232 506__ $$arestricted
000020232 520__ $$2eng$$aAnchorages with post-installed anchors are commonly used in nuclear power plants to connect non-structural components such as piping systems to concrete structures. For nuclear safety related fastenings, particular requirements concerning their load and displacement behavior are demanded to avoid failure or loss of functionality of certain components. During an earthquake, the anchorage has to transfer the seismic loads resulting from interactions between the structural and non-structural elements, while cracks open and close in the concrete structure in which the anchor is installed. In existing qualification guidelines, the seismic performance of anchors is evaluated by means of experimental load and crack cycling tests on single anchors. In order to investigate the behavior of anchor groups supporting non-structural components under real earthquake conditions, dynamic interactions between the coupled system consisting of concrete structure, post-installed anchors with anchor plate and component have to be considered. Within the scope of a research project, large-scale experiments were carried out on a 2-anchor group connecting a piping system to a concrete slab. The test specimens were subjected to seismic loading by an electrodynamic shaker mounted on the pipe and representative cycling crack widths in the concrete member. Two different types of undercut anchors qualified for application in German nuclear power plants were tested. This paper presents a detailed description of the specially designed test setup and testing methodology considering realistic earthquake excitations. The results of a total of ten conducted tests provide information on the load-displacement behavior of the anchorage at different crack widths and under various load levels. Anchors subjected to simultaneous load and crack cycling experience continuously increasing displacements. This effect becomes more pronounced in particular for large crack widths. Residual displacements of the anchors may lead to impacts in case of tension-compression loading on the anchorage. However, the anchor displacement performance observed in the presented tests agrees fairly well with results obtained on isolated single anchors.

000020232 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000020232 653__ $$aseismic testing; nuclear power plant; non-structural component; post-installed anchor; displacement behavior

000020232 7112_ $$a16th World Conference on Earthquake Engineering$$cSantiago (CL)$$d2017-01-09 / 2017-01-13$$gWCEE16
000020232 720__ $$aKerkhof, Klaus$$iDwenger, Fabian$$iLotze, Dieter$$iBirtel, Veit$$iFröhlich, Thilo
000020232 8560_ $$ffischerc@itam.cas.cz
000020232 8564_ $$s1309497$$uhttps://invenio.itam.cas.cz/record/20232/files/797.pdf$$yOriginal version of the author's contribution as presented on USB, paper 797.
000020232 962__ $$r16048
000020232 980__ $$aPAPER