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An Equivalent Multi-Phase Similitude Law for Pseudodynamic Test on Small-scale RC Models

RC 축소모형의 유사동적실험을 위한 Equivalent Multi-Phase Similitude Law

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  • Guo, Xun (Institute of Engineering Mechanics(China))
  • 김남식 (현대건설기술연구소) ;
  • 이지호 (서울대학교 지구환경시스템공학부) ;
  • 장승필 (서울대학교 지구환경시스템공학부) ;
  • Published : 2003.12.01

Abstract

Small-scale models have been frequently used for experimental evaluation of seismic performance because of limited testing facilities and economic reasons. However, there are not enough studies on similitude law for analogizing prototype structures accurately with small-scale models, although conventional similitude law based on geometry is not well consistent in the inelastic seismic behavior. When fabricating prototype and small-scale model of reinforced concrete structures by using the same material. added mass is demanded from a volumetric change and scale factor could be limited due to size of aggregate. Therefore, it is desirable that different material is used for small-scale models. Thus, a modified similitude law could be derived depending on geometric scale factor and equivalent modulus ratio. In this study, compressive strength tests are conducted to analyze equivalent modulus ratio of micro-concrete to normal-concrete. Equivalent modulus ratios are divided into multi phases, which are based on ultimate strain level. Therefore, an algorithm adaptable to the pseudodynamic test. considering equivalent multi-phase similitude law based on seismic damage levels, is developed. In addition, prior to the experiment. it is verified numerically if the algorithm is applicable to the pseudodynamic test.

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