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DOI: https://doi.org/10.4491/eer.2021.639
Experimental Evaluation of Water Supply Pipe Joints against Seismic Ground Deformation: A Four-point Bending Test
HaYoung Kang, Jun Young Kim, Youngnoh Kim, Seongjun Park, and Jong-Oh Kim
Department of Civil and Environmental Engineering, Hanyang University, 222 Wangsimni-ro, Seongdong-gu, Seoul 04763, Republic of Korea
Corresponding Author: Jong-Oh Kim ,Tel: +82 2 970 6626, Fax: +82 2 971 5776, Email: jk120@hanyang.ac.kr
Received: December 24, 2021;  Accepted: May 11, 2022.
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ABSTRACT
Due to permanent ground deformation (PGD) such as earthquakes and liquefaction, water supply pipes and connected joints may experience rotation and deflection through losing its function and complex water contamination. Since the specifications of joints are different in each country, evaluating joints are difficult to manage the functional maintenance of water network system. In this study, two metallic and three non-metallic pipe joints were selected through the joints commonly used in Korea. PGD simulation could be conducted through Four-point bending test which derives the result of deflection angle, moment and strain value for damaged pipes. Each component showed above M-1 grade which resulted based on the grade of ISO 16134. To compare metallic pipe results, collar joint showed stronger binding force than the mechanical joint, but in deflection angle result mechanical showed higher value. In non-metallic pipe test, since its material contains large flexibility, strain value mainly affected its result. Based on this study, functional evaluation of water supply pipeline regarding the PGD was identified through comparing tendency of each joint characterization. Moreover, these data can be expected to be utilized as the basis of performance evaluation and critical component in piping design.
Keywords: Four-point bending test | Ground deformation | Seismic properties | Water supply pipe joint
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