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http://dx.doi.org/10.5000/EESK.2003.7.2.075

Reliability of Nonlinear Direct Spectrum Method with Mixed Building Structures  

강병두 (거창전문대학 건축과)
김재웅 (동아대학교 건축학부)
Publication Information
Journal of the Earthquake Engineering Society of Korea / v.7, no.2, 2003 , pp. 75-84 More about this Journal
Abstract
Most structures are expected to deform beyond the limit of linearly elastic behavior when subjected to strong ground motion. Seismic evaluation of structure requires an estimation of the structural performance in terms of displacement demand imposed by earthquakes on the structure. The nonlinear response history analysis(NRHA) among various nonlinear analysis methods is the most accurate to compute seismic performance of structures, but it is time-consuming and necessitate more efforts. The nonlinear approximate methods, which is more practical and reliable tools for predicting seismic behavior of structures, are extensively studied. Among them, the capacity spectrum method(CSM) is conceptually simple, but the iterative procedure is time-consuming and may sometimes lead to no solution or multiple solutions. This paper considers a nonlinear direct spectrum method(NDSM) to evaluate seismic performance of mixed building structures without iterative computations, given dynamic property T from stiffness skeleton curve and nonlinear pseudo acceleration $A_{y}$/g and/or ductility ratio $\mu$ from response spectrum. The nonlinear response history analysis has been performed and analyzed with various earthquakes for estimation of reliability and practicality of NDSM with mixed building structures.
Keywords
mixed building structures nonlinear direct spectrum method(NDSM); pushover analysis; nonlinear response history analysis(NRHA); equivalent single degree of freedom;
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Times Cited By KSCI : 2  (Citation Analysis)
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