000018291 001__ 18291
000018291 005__ 20170118182215.0
000018291 04107 $$aeng
000018291 046__ $$k2017-01-09
000018291 100__ $$aNishikawa, Gentaro
000018291 24500 $$aStudy on the Seismic Design of Polyethylene Pipe During An Earthquake

000018291 24630 $$n16.$$pProceedings of the 16th World Conference on Earthquake Engineering
000018291 260__ $$b
000018291 506__ $$arestricted
000018291 520__ $$2eng$$aEvaluation of the seismic performance of a buried pipeline changes depending on whether the pipe slips against the surrounding soil. When slippage occurs, stress and strain concentrate on junctions and bends. Important factors as to whether slippage occurs are the critical shear stress of the soil (τ cr ) and the elasticity of the pipe materials. Since there were few reports of experiments regarding τ cr of polyethylene pipe (HPPE), we conducted experiments to investigate the performance of HPPE. Our results are as follows: (1) τ cr of HPPE (straight pipe) is approximately 10 kN/m2 under 60 cm of backfilling soil. Therefore, we adopted a τ cr of 10 kN/m2, which comes from the experiments with steel pipe, although there is a large difference in elasticity between HPPE and steel pipe. This means that the existing seismic design method for buried pipelines can be applied to HPPE. (2) τ cr of HPPE with accessories including an Electric Fusion(EF) coupler and branch saddle rise to 10.8 kN/m2–19.5 kN/m2 because these accessories become the resistance in the soil. (3) We found that even HPPE can slip by approximately 12 mm in solid ground, which is approximately 1/20 of the maximum slippage of steel pipe. It was considered that the slippage of HPPE has little influence on junctions and bends.

000018291 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000018291 653__ $$aburied pipeline; polyethylene pipe; critical shear stress; slippage effect

000018291 7112_ $$a16th World Conference on Earthquake Engineering$$cSantiago (CL)$$d2017-01-09 / 2017-01-13$$gWCEE16
000018291 720__ $$aNishikawa, Gentaro$$iShiohama, Yuichi$$iSuzuki, Tsuyoshi$$iOnuma, Hiromoto$$iKiyono, Junji
000018291 8560_ $$ffischerc@itam.cas.cz
000018291 8564_ $$s650107$$uhttps://invenio.itam.cas.cz/record/18291/files/1175.pdf$$yOriginal version of the author's contribution as presented on USB, paper 1175.
000018291 962__ $$r16048
000018291 980__ $$aPAPER