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http://dx.doi.org/10.5000/EESK.2004.8.1.017

Direct Inelastic Earthquake Design Using Secant Stiffness  

박홍근 (서울대학교 공과대학 건축학과)
엄태성 (서울대학교 공과대학 건축학과 건축구조시스템연구실)
Publication Information
Journal of the Earthquake Engineering Society of Korea / v.8, no.1, 2004 , pp. 17-27 More about this Journal
Abstract
A new earthquake design method performing iterative calculations using secant stiffness was developed. The proposed design method has the advantages of convenience and stability in numerical analysis because it uses elastic analysis. At the same time, the proposed design method can accurately estimate the strength and ductility demands on the members because it performs the analysis on the inelastic behavior of structure using iterative calculation. In the present study, the procedure of the proposed design method was established, and a computer program incorporating the proposed method was developed. Design examples using the proposed method were presented, and its advantages were presented by the comparisons with existing design methods using elastic or inelastic analysis. The proposed design method, as an integrated method of analysis and design, can address the earthquake design strategy devised by the engineer. such as ductility limit on each member, the design concept of strong column - weak beam, and etc. In addition, through iterative calculations on the structure preliminarily designed only with member sizing, the strength and ductility demands of each member can be directly calculated so as to satisfy the given design strategy. As the result. economical and safe design can be achieved.
Keywords
seismic design; secant stiffness; elastic analysis; inelastic analysis; reinforced concrete; performance-based design;
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