Comparison of Methods to Improve Seismic Performance Depending on the Use of Expansion Joint
Jae-Ou Lee1, Ka-Young Oh2, Dae-Seok Bang3

1Jae-Ou Lee, Department of Fire and Disaster Prevention, Daejeon University, Daejeon City, Korea, East Asia.

2Ka-Young Oh, Department of Fire and Disaster Prevention, Daejeon University, Daejeon City, Korea, East Asia.

3Dae-Seok Bang, Department of BNS Joint Corporation, Siheung City, Gyeonggi-do, Korea, East Asia.  

Manuscript received on 10 June 2019 | Revised Manuscript received on 17 June 2019 | Manuscript Published on 22 June 2019 | PP: 670-675 | Volume-8 Issue-8S2 June 2019 | Retrieval Number: H11120688S219/19©BEIESP

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Abstract: Background/Objectives: In this study, seismic safety of piping is analyzed by applying 0.5g ground acceleration to sprinkler piping. It is the purpose of this study to confirm the improvement of seismic safety depending on whether multi-joint application with plastic deformation is possible through seismic safety analysis. Methods/Statistical analysis: The static analysis method was used as the analysis method and the safety of the piping was compared according to the presence or absence of joints capable of plastic displacement. Sprinkler installation piping was analyzed based the general installation standards of piping. Findings: As a result of analyzing the stresses without joints, it was found that the allowable stress exceeded in some sections of the pipe, and that the safety was not being secured in case of earthquakes. As a result of analyzing the stress of the pipe where the joint is installed, it is understood that the stress and the displacement are interpreted within the range of allowable stress and the safety of the pipe can be ensured when the earthquake occurs. Stress generated in the piping during the earthquake are not constantly generated at certain intervals, but are interpreted differently depending on the installation conditions of the piping and the type of load. In addition, due to the concentrated stress generated in part of the pipeline, serious damage can occur when an earthquake occurs, which can seriously affect the performance of the fire fighting system. Improvements/Applications: In order to solve this problem, it is necessary to analyze the safety of the structure of the piping and to secure safety against earthquakes by installing a device capable of actively bearing the stress and displacements in areas where problems may occur. And, through installation of multi joint which can generate plastic deformation in piping, if it can be generated at the time of earthquake, it could absorb stress and displacement and improve earthquake safety.

Keywords: Joint, Pipe Stress, Plastic Displacement, Seismic Performance, Sprinkler Facility, Static Analysis.
Scope of the Article: Analysis of Algorithms and Computational Complexity