Structure-Specific Scalar Intensity Measures for Near-Source and Ordinary Earthquake Ground Motions

Earthquake Spectra - Tập 23 Số 2 - Trang 357-392 - 2007
Nicolas Luco1, C. Allin Cornell2
1Department of Civil & Environmental Engineering, Stanford University, Stanford, CA 94305 (now at U.S. Geological Survey, PO Box 25046, MS 966, Denver, CO 80225)
2Department of Civil & Environmental Engineering, Stanford University, Stanford, CA 94305-4020

Tóm tắt

Introduced in this paper are several alternative ground-motion intensity measures ( IMs) that are intended for use in assessing the seismic performance of a structure at a site susceptible to near-source and/or ordinary ground motions. A comparison of such IMs is facilitated by defining the “efficiency” and “sufficiency” of an IM, both of which are criteria necessary for ensuring the accuracy of the structural performance assessment. The efficiency and sufficiency of each alternative IM, which are quantified via (i) nonlinear dynamic analyses of the structure under a suite of earthquake records and (ii) linear regression analysis, are demonstrated for the drift response of three different moderate- to long-period buildings subjected to suites of ordinary and of near-source earthquake records. One of the alternative IMs in particular is found to be relatively efficient and sufficient for the range of buildings considered and for both the near-source and ordinary ground motions.

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Earthquake Spectra

Tập 23 Số 2

357-392

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