This series includes technical reports prepared by faculty, students and staff who are associated with the John A. Blume Earthquake Engineering Center at Stanford University. While the primary focus of Blume Center is earthquake engineering, many of the reports in this series encompass broader topics in structural engineering and materials, computational mechanics, geomechanics, structural health monitoring, and engineering life-cycle risk assessment. Each report includes acknowledgments of the specific sponsors for the report and underlying research. In addition to providing research support, the Blume Center provides administrative support for maintaining and disseminating the technical reports. For more information about the Blume Center and its activities, see https://blume.stanford.edu.
Earthquake ground motion has been observed to be altered by the various types of soils encountered along the path of energy propagation. Changes occur die to the different soil layers, the depth of the soil layer to bedrock, irregularities within a soil layer, different densities, shear wave velocities, and natural periods of soil. Furthermore, the effect of the local soil on the ground motion will depend on the strength for the initial energy release, its frequency characteristics and its duration.
Kiremidjian, AS and Shah, HC. (1978). Probabilistic Site-Dependent Response Spectra. John A. Blume Earthquake Engineering Center Technical Report 29. Stanford Digital Repository. Available at: http://purl.stanford.edu/hf854bf0489
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