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Advances in Materials Science and Engineering - Volume 2017 2017, Article ID 6543175, 10 pages - https:-doi.org-10.1155-2017-6543175

Research Article

Department of NPP Engineering, KEPCO International Nuclear Graduate School, 658-91 Haemaji-ro, Seosaeng-myeon, Ulju-gun, Ulsan 45014, Republic of Korea

Structural Engineering Research Institute, Korea Institute of Civil Engineering and Building Technology KICT, 283 Goyang-daero, Ilsanseo-gu, Goyang-si, Gyeonggi-do 10223, Republic of Korea

Correspondence should be addressed to Seong-Cheol Lee

Received 1 January 2017; Accepted 20 March 2017; Published 3 April 2017

Academic Editor: Katsuyuki Kida

Copyright © 2017 Seong-Cheol Lee et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Recently, ultra high performance fiber reinforced concrete UHPFRC has been developed to attain considerably increased compressive cracking strength and ductile tensile behavior with high tensile strength through adding straight steel fibers in concrete mixture. Although benefits with UHPFRC were investigated through experimental program, it is difficult to predict structural behavior of UHPFRC members since theoretical approaches are limited. In this paper, inverse analysis procedure has been proposed for a three-point bending test with notched UHPFRC beams so that tensile behavior of UHPFRC could be rationally evaluated. On the inverse analysis procedure, failure mode of the UHPFRC beam was simplified and the simplified diverse embedment model SDEM was employed. To verify the proposed inverse analysis procedure, UHPFRC beams with a notch were analyzed with the tensile behavior of UHPFRC evaluated through the inverse analysis procedure. The analytical predictions showed good agreement with the load-crack mouth opening displacement CMOD responses measured through the three-point bending test. Consequently, it can be concluded that UHPFRC tensile behavior can be rationally evaluated through the proposed inverse analysis procedure. The proposed inverse analysis procedure can be useful in relevant research areas such as development of advanced design approaches or computational methods for UHPFRC members.





Autor: Seong-Cheol Lee, Han-Byeol Kim, and Changbin Joh

Fuente: https://www.hindawi.com/



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