Recent earthquakes worldwide have proven that losses result not only from damage to building structures but also from nonstructural components. Therefore, a correct design of these components can ensure not only the functionality and the life safety but also reduce the economical losses. Among nonstructural components fire-protection piping systems play an important role for critical facilities such as hospitals that are required to guarantee the immediate operation after a seismic event. In order to conduct a more accurate seismic analysis or damage assessment of the piping systems, it is necessary to establish reliable numerical models. In this work, the results of an experimental ambient vibration test are reported to determine the dynamic properties of a piping system, such as the natural frequencies and mode shapes, to establish the constraints that are uncertain in case of existing constructions, and upload a numerical model implemented by MIDAS FEA NX software. Most of the numerical natural frequencies achieve a good correlation with the measured frequencies, allowing a calibration of the effective constraints. Finally the preliminary results related to the efficiency of the test layout for damage detection are reported and discussed.
Dynamic Characterization and Damage Detection of a Fire-Protection Piping System
De Angelis A.;Maddaloni G.;Pecce M. R.
2023-01-01
Abstract
Recent earthquakes worldwide have proven that losses result not only from damage to building structures but also from nonstructural components. Therefore, a correct design of these components can ensure not only the functionality and the life safety but also reduce the economical losses. Among nonstructural components fire-protection piping systems play an important role for critical facilities such as hospitals that are required to guarantee the immediate operation after a seismic event. In order to conduct a more accurate seismic analysis or damage assessment of the piping systems, it is necessary to establish reliable numerical models. In this work, the results of an experimental ambient vibration test are reported to determine the dynamic properties of a piping system, such as the natural frequencies and mode shapes, to establish the constraints that are uncertain in case of existing constructions, and upload a numerical model implemented by MIDAS FEA NX software. Most of the numerical natural frequencies achieve a good correlation with the measured frequencies, allowing a calibration of the effective constraints. Finally the preliminary results related to the efficiency of the test layout for damage detection are reported and discussed.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
