NEHRP Clearinghouse
- Title
- Ground Characteristics and Free Field Strains.
- File
- PB298150.pdf
- Author(s)
- Shinozuka, M.; Kawakami, H.
- Source
- National Science Foundation, Washington, DC. Engineering and Applied Science., August 1977, 37 p.
- Abstract
- Elastic shear strains in the non-homogeneous surface layer subjected to incident shear waves have been evaluated using a quasi-two-dimensional analysis. The shear strains arise from the randomly non-homogeneous property of a surface layer subjected to vertically incident shear waves emanating through the semi-infinite firm ground underneath. Shear strains produced by different incident shear waves have been computed for the root mean square (RMS) values for the metropolitan Tokyo area on the basis of local soil conditions. A reasonable correlation was established between such normal strains and the statistics collected on the underground water supply pipelines under the 1923 Kanto Earthquake. Mathematical formulas, diagrams, data tabulations, charts, and numerous references are included.
- Keywords
- Water supply; Tokyo (Japan); Subsurface structures; Earth movements; Shear strain; Ground motion; Earthquake engineering; Soil properties; Elastic properties; Japan; Pipelines; Soil mechanics; Earthquakes