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首页> 外文会议>International collaboration in lifeline earthquake engineering 2016 >Characteristics of Pipeline Damages in the 2014 Northern Nagano Prefecture Earthquake in Japan
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Characteristics of Pipeline Damages in the 2014 Northern Nagano Prefecture Earthquake in Japan

机译：2014年日本长野县北部地震管道的破坏特征

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摘要

This paper describes the results of the field survey of water pipelines damages in the village of Hakuba caused by the 2014 northern Nagano Prefecture earthquake (M6.7, maximum seismic intensity lower 6 in JMA scale). The fault runs from north to south through Hakuba. Near the fault, compressed damages were observed for ductile iron pipes (standard joint), polyethylene pipes, steel pipes, and PVC pipes body. These damages were caused by ground compression. At a certain site, no damage was observed for polyethylene (HDPE) pipes and PVC pipes crossing the fault where the fault emerged at the ground surface. The polyethylene pipe was deformed in S-shaped across the fault. It was not corresponding with Z-shaped deformation of the stratum. Based on the ground displacement measured in this site, FEM analysis was conducted considering the geometric nonlinearity of the ground and pipe. The results indicated that the inner and the outer side of S-shaped polyethylene pipe cause strain concentration and the strain exceeds the maximum allowance value in case of 50 cm compressed deformation.
机译：本文介绍了2014年长野县北部地震（M6.7，最大地震烈度低于JMA等级6级）对白马村自来水管道损害的现场调查结果。断层从北到南穿过白马。在断层附近，观察到球墨铸铁管（标准接头），聚乙烯管，钢管和PVC管体受到压缩损坏。这些损坏是由地面压缩造成的。在某个位置，穿越断层的聚乙烯（HDPE）管和PVC管未发现损坏，断层出现在地面。聚乙烯管穿过断层变形为S形。它与地层的Z形变形不符。基于在该站点测量的地面位移，考虑了地面和管道的几何非线性，进行了有限元分析。结果表明，在50 cm压缩变形的情况下，S形聚乙烯管的内侧和外侧会引起应变集中，并且应变超过最大允许值。

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