Coherency model for dense seismic array

Show simple item record Rodda, Gopala Krishna Basu, Dhiman 2018-08-23T05:49:51Z 2018-08-23T05:49:51Z 2018-08
dc.identifier.citation Rodda, Gopala Krishna and Basu, Dhiman, "Coherency model for dense seismic array", in Recent Advances in Structural Engineering (Volume 2), DOI: 10.1007/978-981-13-0365-4_26, Springer, Aug. 2018, pp. 303-316, ISBN: 9789811303654. en_US
dc.identifier.isbn 9.78981E+12
dc.description.abstract The recorded translational motions represent characteristics of the seismic excitation at one single point. Most foundation systems have finite, but considerable dimension, and it may offer rigidity constraint over the underlying soil. However, the extent of rigidity depends on the foundation footprint. Therefore, free-field ground motions are in general preferred in seismic design and effect of foundation flexibility is separately accounted for in a case-by-case. Hence, information about the spatial variability of translational motion is needed for seismic design of structures. Coherency is the best descriptor of spatial variability quantitatively. Moreover, description of the ground motion input cannot be completed without specifying the rotational ground motion. Since direct measurement of the rotational excitations is not feasible, these components must be extracted from the recorded translational data under suitable assumptions so as to account for their effects in an approximate sense in seismic design. Once the coherency is estimated, a number of procedures are available to generate spatially varying ground motion conditioned upon a seed event and coherency model. Objectives of this study are to obtain a coherency model for translational and rotational motion to completely specify the appropriate ground motion fields.
dc.description.statementofresponsibility by Gopala Krishna Rodda and Dhiman Basu
dc.language.iso en en_US
dc.publisher Springer en_US
dc.subject Lagged coherency en_US
dc.subject Dense seismic array en_US
dc.subject Rotational motion en_US
dc.subject Appropriate translational components en_US
dc.title Coherency model for dense seismic array en_US
dc.type Book chapter en_US

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