Woo Young Jung and Min Ho Kwon and Bu Seog Ju
Piping Fragility Composed of Different Materials by Using OpenSees Software
123 - 126
2014
8
2
International Journal of Bioengineering and Life Sciences
https://publications.waset.org/pdf/9997309
https://publications.waset.org/vol/86
World Academy of Science, Engineering and Technology
A failure of the nonstructural component can cause significant damages in critical facilities such as nuclear power plants and hospitals. Historically, it was reported that the damage from the leakage of sprinkler systems, resulted in the shutdown of hospitals for several weeks by the 1971 San Fernando and 1994 North Ridge earthquakes. In most cases, water leakages were observed at the cross joints, sprinkler heads, and Tjoint connections in piping systems during and after the seismic events. Hence, the primary objective of this study was to understand the seismic performance of Tjoint connections and to develop an analytical Finite Element (FE) model for the Tjoint systems of 2inch fire protection piping system in hospitals subjected to seismic ground motions. In order to evaluate the FE models of the piping systems using OpenSees, two types of materials were used 1) Steel02 materials and 2) Pinching4 materials. Results of the current study revealed that the nonlinear momentrotation FE models for the threaded Tjoint reconciled well with the experimental results in both FE material models. However, the systemlevel fragility determined from multiple nonlinear time history analyses at the threaded Tjoint was slightly different. The systemlevel fragility at the Tjoint, determined by Pinching4 material was more conservative than that of using Steel02 material in the piping system.
Open Science Index 86, 2014