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Design Ground Motion Library

by Maurice Power, Robert Youngs and Chih-Cheng Chin

Power, Maurice, Robert Youngs and Chin-Cheng Chin (2004). Design Ground Motion Library. SMIP04 Seminar on Utilization of Strong-Motion Data, p. 1 - 24.

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Criteria and guidelines being utilized to form a Design Ground Motion Library (DGML) are summarized in this paper. The DGML is being formed as an electronic library of selected recorded acceleration time histories considered to be suitable for use by engineering practitioners for the time history dynamic analysis of various facility types in California and other parts of the Western United States (WUS). The broad criterion governing selection of records is that the records be representative of ranges of design earthquakes and ground motions expected for the WUS seismic environment. Separate sets of records are being developed for different ranges of earthquake magnitude and earthquake source-to-site distance, for soil and rock site conditions, and for different period ranges of significance for different types of structures. Ground motion characteristics that are used in criteria for record selection include measures of response spectral shape characteristics and, for near-source record sets, pulsive characteristics of ground motion caused by rupture directivity effects.