In the latest revision of the Greek standard for concrete reinforcement steel (ΕΛΟΤ 1421:2007) - in order to improve the performance of concrete framed buildings during an earthquake - a characterisation of rebar steel with regard to ductility was adopted (previous version of the standard were concerned with strength only). Three class of steel have been introduced A, B and C in the order of increased ductility. The highest grade, B500C, was selected for the rebar steel to be used in Greece.
|In the figure that follows the results of laboratory testing on three structural members made with identical reiforcement but with steel of class A, B and C are presented. The members were subjected to vertical loads until failure. The supirior performance of Class B500C steel compared to the other two classes can be clearly seen.||
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