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Mechanical Characteristics of Materials Used in a 1/5 Scale Model of a 7-Story Reinforced Concrete Test Structure.
Bertero, V. V.; Aktan, A. E.; Harris, H. G.; Chowdhury, A. A.
National Science Foundation, Washington, DC., October 1983, 90 p.
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One of the primary objectives of the U.S.-Japan Cooperative Research Program and the associated integrated analytical and experimental research program in progress at U.C. Berkeley is to evaluate the reliability of experimental analysis of R/C at all response limit states, utilizing a so-called true replica medium scale model, (i.e., a model which supplies simultaneous duplication of inertial, gravitational, and resisting forces). A most serious problem encountered in the attainment of an adequate model was observed to be that of satisfying the similitude requirements for the stress-strain constitutive relations between the constituent materials of the full-scale and 1/5 scale models. This report documents efforts undertaken to attain material similitude for the 1/5 scale model. The consequences of unavoidable distortions between the stress-strain constitutive relations and physical properties of reduced scale and full-scale model materials on the correlation of all the limit state responses of these two structural models are evaluated. It is concluded that there are still significant limitations in the state-of-the-practice of reduced scale model fabrication, particularly in micro-concrete fabrication, in which the mechanical (dynamic) characteristics and physical properties of the concrete used in the full-scale model are duplicated.
Stress strain diagrams; Reinforced concrete; Scale models; Models; Dynamic structural response; Earthquake engineering; Scale (Ratio)