@article{oai:tokyo-metro-u.repo.nii.ac.jp:00005181,
 author = {Takahiro, Kunii and 国井, 隆弘},
 issue = {38},
 journal = {総合都市研究},
 month = {},
 note = {都市供給施設とライフラインとの関連・名称を定義した上で，水道・ガス管という地中埋設管に焦点をしぼり，ハードな面から地震災害想定技法の検討を行なっている。ライフラインの同技法の取り扱い手法の歴史的背景に言及して，現在まで提案されている手法を評価している。その結果ライフラインにおいては神奈川県の報告書およぴ岩倉市の報告書が十分に評価できる事，および今後の課題を示している。この課題には耐震設計法である応答変位法の問題点あるいはこれまでの手法に関する問題点が含まれるが，それに対して解決できる新しい技法の提案がなされている。この技法は最近多くの議論をもたらしている表層地盤の不整形性の観点にあり，その背景および今後の展望について新しい論点が明らかにされている。, This paper reports on the technical estimation of damage to underground "life lines"-water supply and gas pipelines-which are part of "urban supply equipments" (i.e. water supply systems, sewerage, gas pipes， transmission Systems, electricity, etc.) . In a strong earthquake, underground pipelines will presumabley be damaged at many points. In view of the loss of life faculty, such damage will have to be promptly repaired. The study of the loss of faculty of these underground pipelines is classified as follows: a) strain of pipeline b) liquefaction of sand layers c) emergency systems d) network theory e) backup systems. Here we are concerned with the study of a) by means of FEM analysis. Problems b) through e) are referred to in the report of Kanagawa prefecture Since about 1970， researchers in Japan have analyzed seismic deformation design processes in search for ways of making oil pipelines aseismic. In 1977， this concept was defined as Displacement Response Method (DRM) . An earlier aseismic examination method for underground pipelines was considered insufficient， since it was based on the assumption that ground surface， surface layers and base are parallel， while in many urban regions they are in fact irregular. A report of the Tokyo Disaster Prevention Conference dealt with this irregular condition by calculating separate predominant frequencies for every 1 km of mesh. Damage evaluations from several past earthquakes were also introduced. My paper reports on FEM and DEM analysis of a 500 m mesh in Setagaya Ward and compares the results with those of the Disaster Prevention Conference report. There is agreement in region， but not in the scale of mesh. My next report will be on "FEM analysis based on the FLUSH program, " published under the title "Effect of Surface Layers with Irregular Bases on Seismic Waves" in the 1989 symposium report of the Science Council of Japan., postprint},
 pages = {65--74},
 title = {都市供給施設（ライフライン）},
 year = {1989}
}