Location Sensitivity of Non-structural Component for Channel-type Auxiliary Building Considering Primary-secondary Structure Interaction

Abstract

To ensure the safe and stable operation of nuclear power plants (NPP), many non-structural components (NSCs) are actively associated with NPP. Generally, floor response spectrum (FRS) is used to design the NSCs. Nevertheless, it is essential to focus on the mounting position and frequency of NSCs which is normally ignored during the conventional design of NSCs. This paper evaluates the effect of mounting location for NSCs over the same floor in a channel-type auxiliary building. The modal parameter estimation is taken into account to capture the dynamic property of the NPP auxiliary building by the shake table test; which leads to the calibration of the finite element model (FEM). The calibration of FEM was conducted through response surface methodology (RSM) and the calibrated model is verified utilizing modal parameters as well as frequency response spectrum function. Finally, the location sensitivity was investigated by time history analysis (THA) under artificially generated design response spectrum compatible earthquakes and sine sweeps. The result showed that the right choice of location for NSCs can be an important measure to reduce the undesirable responses during earthquakes, which can reduce up to 30% horizontal and 70% vertical zero period acceleration (ZPA) responses in channeltype auxiliary buildings.

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“…To do this, it is necessary to calculate the floor response spectrum (FRS) at the location where the NSC is connected to the main system. *Corresponding Author Email: noroozinejad@kgut.ac.ir (E. Noroozinejad Farsangi) Using a decoupled analysis method, the floor response spectrum (FRS) approach, is used [7][8][9][10][11][12][13][14][15]. Without considering the impact of the secondary system, the fundamental structure is dynamically analyzed first.…”