Abstract
In this study, a field survey was conducted on the fixed anchorages of the operation and power generation facilities installed in domestic power plants. A static/dynamic performance evaluation was conducted to present safety evaluation guidelines that meet the domestic seismic performance requirements. Seismic performance tests were performed on the post-installed set anchors M10 and M12, which are mainly used for anchorages in accordance with the US and European seismic performance standards. The dynamic shear test results showed that the M12 anchor met the seismic performance verification criterion, whereas the M10 anchor did not because its dynamic performance was reduced, owing to the cyclic loading. In the results of the dynamic pull-out test, M12 also met the seismic performance verification criterion, whereas M10 was safe only in a non-cracked state. In summary, the seismic performance of M12 in both cracks and non-cracks was satisfied, but, in the case of M10, the results were not satisfied in cracks. This was an experimental study; it will be necessary to conduct additional analytical research in the future to verify the reliability and parameters of the experiment.
Highlights
When the maximum loads of the dynamic pullout tests were compared with those of the static tests, the maximum pull-out loads under dynamic loads were found to be higher. This appears to be because the clearance between the concrete and the set anchor, which existed at the time of the set anchor installation, contributed to the concrete–anchor frictional force that was generated by vibration under the application of cyclic loading
A field study was conducted on the fixation unit of post-installed anchors used in operation and power generation facilities installed in domestic power plants
The static shear test results of the M10 and M12 set anchors showed that steel failure occurred in both the cracked and non-cracked concrete
Summary
Most operation and power generation facilities that are used in power plants have important functional purposes and are independently constructed on concrete slabs applying fixation systems. According to a Federal Emergency Management Agency (FEMA) report, the frequency of occurrence of earthquakes with a magnitude of 5.0 or higher has been continuously increasing over the last 10 years, and there has been an increasing amount of damage to non-structural elements, such as operation and power generation facilities in power plants [3]. Most of this damage has involved an overturning or sliding of the facility from damaged anchors embedded in cracked concrete. Ta3en.cchhEnoxircspa[le1A1r]ip.mpFrooervntahtle(OCEO1vTcelAars),sviifiineccalwutidoen the for design standards for mechanical post-installed non-structural elements, it is assumed that they
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