Comparison of Localized Surface Deformation and Localization of Building Damage 17 January 1994 Northridge Earthquake

9416760约翰逊 这项研究将确定房屋、道路和其他结构的集中损坏区域是否可以归因于1994年1月17日北岭地震期间沿沿着埋藏断层的局部地面变形区域。 初步调查已经确定了坦帕大道和巴尔博亚大道附近的压裂区。 地面变形的细节将通过地震前和地震后的地面调查和航空照片进行评估。 测量人孔盖、消防栓等之间的线的长度变化将用于准备详细的二维应变网格图。 研究结果将表明北岭地震后立柱区域的局部破坏主要是由于地面变形，还是由于某些其他机制（如山谷填充物的震动），从而有助于评估洛杉矶盆地中包含埋藏断层的其他区域的地震危险性。

9416760 Johnson This study will determine whether areas of concentrated damage to houses, roads and other structures can be ascribed to areas of localized ground deformation along buried faults during the January 17, 1994 Northridge earthquake. Preliminary investigations have identified zones of fracturing in the vicinity of Tampa Avenue and Balboa Avenue. Details of ground deformation will be assessed with pre- and post-earthquake ground surveys and aerial photographs. measurements of changes in length of lines between manhole covers, fire hydrants, etc. will be used to prepare a detailed, two-dimensional strain grid map. The results will indicate whether the localized damage in the stud areas after the Northridge event was due primarily to ground deformation, or to some other mechanism such as shaking in valley fill, and will thus help in evaluating the seisin hazard of other areas of the Los Angeles basin that contain buried faults.