@article{oai:tokyo-metro-u.repo.nii.ac.jp:00004751, author = {Tamura, Toshikazu and 田村, 俊和}, issue = {8}, journal = {総合都市研究}, month = {Dec}, note = {大規模宅地造成開始前と後とで,丘陵地における木造家屋の地震被害にどのような変化があったかをみるため, 1923年関東地震時の東京都多摩丘陵,1968年十勝沖地震時の札幌近郊,および1978年宮城県沖地震時の仙台周辺の各例について,被害率,被害タイプ,およびそれらに関連する地盤条件を検討し,それを相互に比較した。その結果,在来型土地利用の場合の丘陵地での木造家屋被害はほとんどが谷底の軟弱地盤による振動被害であること,近年の大規模宅造地での被害は,切土地と盛土地の境界部に集中する場合と厚い盛土地の中心部に集中する場合とがあり,前者の被害は地震断層上での被害に類似すること,等が明らかになった。また宅造地に出現する2通りの被害分布タイプは造成様式と関連していることが推測された。これらの知見は,従来資料が不足していた丘陵地(のとくに宅地造成地)を含む地域での,今後の被害予測やサイスミック・マイクロゾーニング等にも活用できる。, The landuse pattem in the hills of Japan was drastically changed by the initiation of large-scale residential development in the 1960's. Its suspected influence in the occurence of earthquake damage of wooden houses in the hills is the subject in question. Damage in relation to ground conditions in the hills has not been as intensively analysed as in the alluvial lowlands. Four studies of earthquake damage in Japan - the Tama Hills in the 1923 Kanto Earthquake,Kiyota in Sapporo in the 1968 Tokachi Oki Earthquake, Nankodai and Midorigaoka in Sendai in the 1978 Miyagi-ken Oki Earthquake - were analysed and compared with one another,and the followin results were obtained. (1) Damage done to wooden structures in the hills under customary rural use results from the collapse of houses due to strong vibrations of soft ground in valley floors. (2) Following are two types of wooden structure damage-ratio distribution patterns in recently developed residential districts constructed upon hill-lands after intense artificial modification of landform: (a) the highest damage ratio is recorded near the boundary of cut-zones and fill-zones,and (b) the damage ratio is higher in the center of fill-zones than at cut/fill boundaries. (3) Damaged houses of the (a) type mentioned above are sheared at their foundations and walls by cracks in the ground. Such features resemble damage of houses just upon surface faults or echelon fissures along the faults. (4) Differerentiation of the two types of damage mentioned in (2) seems to depend on the mode of artificial landform modification. The information as described in the above is applicable to the estimation of damage and deviccs for effectual countermeasures., postprint}, pages = {121--130}, title = {丘陵地における木造家屋の地震被害 : 被害タイプおよび被害発生に関与する地盤条件の時代による変化}, year = {1979} }