Seismic Fragility of Steel Piping System Based on Pipe Size, Coupling Type, and Wall Thickness
- 96 Downloads
In this study, a probabilistic framework of the damage assessment of pipelines subjected to extreme hazard scenario was developed to mitigate the risk and enhance design reliability. Nonlinear 3D finite element models of T-joint systems were developed based on experimental tests with respect to leakage detection of black iron piping systems, and a damage assessment analysis of the vulnerability of their components according to nominal pipe size, coupling type, and wall thickness under seismic wave propagations was performed. The analysis results showed the 2-inch schedule 40 threaded T-joint system to be more fragile than the others with respect to the nominal pipe sizes. As for the coupling types, the data indicated that the probability of failure of the threaded T-joint coupling was significantly higher than that of the grooved type. Finally, the seismic capacity of the schedule 40 wall thickness was weaker than that of schedule 10 in the 4-inch grooved coupling, due to the difference in the prohibition of energy dissipation. Therefore, this assessment can contribute to the damage detection and financial losses due to failure of the joint piping system in a liquid pipeline, prior to the decision-making.
KeywordsT-joint Threaded coupling Grooved coupling Pipeline
This research was supported by a Grant (18CTAP-C129809-02) from infrastructure and transportation technology promotion research program funded by Ministry of Land, Infrastructure and Transport of Korean government.
- Antaki, G. (2004). Seismic capacity of threaded, brazed and grooved clamped joints. In ASME PVP conference, San Diego, CA (pp. 135–145).Google Scholar
- ASME. (2004). Rule for construction of nuclear facility components, ASME boiler and pressure vessel code, section III, American Society of Mechanical Engineers (ASME).Google Scholar
- Ayers and Ezers. (1996). Northridge earthquake hospital water damage study. Sacramento, CA: Office of Statewide Health Planning and Development (OSHPD), Ayers & Ezers Associates, Inc.Google Scholar
- Bachman, R., Bonowitz, D., Caldwell, P. J., Filiatrault, A., Kennedy, R. P., McGavin, G., et al. (2004). Engineering demand parameters for nonstructural components. Redwood City, CA: ATC-58 project task report-ATC.Google Scholar
- Dow, J. (2010). Testing and analysis of iron and plastic T-joint in sprinkler systems, NEESR-GC: Simulation of the seismic performance of nonstructural systems. Available at: http://nees.org/site/oldness/filedir_2/REU2009_DOW_paper.pdf.
- FEMA 461. (2007). Interim testing protocols for determining the seismic performance characteristics of structural and nonstructural components. ATC, 201 Redwood, CA.Google Scholar
- Ju, B. S., Taninada, S. T., & Gupta, A. (2011). Fragility analysis of threaded T-joint connections in hospital piping systems. In Proceedings of the ASME PVP conference, Baltimore, MD.Google Scholar
- Kircher, C. A. (2003). It makes dollars and sense to improve nonstructural system performance. In: Proceedings of seminar on seismic design, performance, and retrofit of nonstructural components in critical facilities, ATC-29-2, Newport beach, CA.Google Scholar
- Mazzoni, S, McKenna, F, Scoot, M. H., & Fenves, G. L. (2006). OpenSees command language manual. Available at: http://opensees.berkeley.edu/.
- NFPA-13. (2007). Standard for the installation of sprinkler system. Quincy, MA: National Fire Protection Association (NFPA).Google Scholar
- OpenSees. (2011). Open system for earthquake engineering simulation (OpenSees). Available at: heep://opensees.berkeley.edu/.Google Scholar
- Porter, K., & Bachman, R. (2006). Developing fragility functions for building components for ATC-58, ATC-58 nonstructural products team.Google Scholar
- Sekiazea, A., Ebihara, M., & Notake, H. (2003). Development of seismic-induced fire risk assessment method for a building. In Fire safety science-proceedings of the seventh international symposium (pp. 309–320).Google Scholar
- SMACNA. (2003). Seismic restraint manual guidelines for mechanical systems, sheet metal and air conditioning contractors’ national association, Inc.Google Scholar
- Tian Y, Fuchs J, Mosqueda G, Filiatrault A. 2010. NEESR Nonstructural: Progress report on tests of Tee Joint component of sprinkler piping system. Progress report, NEESR-GC: Simulation of the seismic performance of nonstructural systems.Google Scholar