Shear Properties of the Strain Hardening Cementitious Composite Material
Publication: Journal of Materials in Civil Engineering
Volume 28, Issue 10
Abstract
Recently, strain hardening cementitious composite (SHCC) material has been used for the shear strengthening and the structural rehabilitation of reinforced concrete structures. However, the shear behavior of this material has not been yet fully understood due to lack of an appropriate and accurate direct shear test method. This paper aims to investigate the shear properties of the SHCC material. For this purpose, Iosipescu shear test was selected, where loads are applied in antisymmetric four-point bending, assuring a pure shear section at the center of the specimen. A special geometry for the specimen was adopted in order to assure a uniform shear stress distribution in the pure shear section. This experimental test can characterize the shear behavior of SHCC material. The experimental test was simulated by the finite element method (FEM)-based computer program, FEMIX. To predict the average shear stress–sliding response, the shear crack softening diagram, available in the multidirectional fixed smeared crack model, was used. After demonstration of the good predictive performance of the numerical model, a parametric study was carried out to evaluate the influence of shear retention factor, fracture energy of mode II, and crack shear strength on the average shear stress–sliding response of the SHCC. The advantage of SHCC instead of conventional mortar was also studied.
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Acknowledgments
The study presented in this paper is a part of the research project titled “PrePam–Pre-fabricated thin panels by using advanced materials for structural rehabilitation” with reference number of PTDC/ECM/114511/2009 provided by FCT (Fundação para a Ciência e a Tecnologia). The first author acknowledges the research grant provided by this project. The authors also thank the following companies for their collaboration: Sika for the sand and adhesive, Grace for the superplasticizers, Dow Chemical Co. for viscous modifying agents, and ENDESA Compostilla power station for the fly ash.
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© 2016 American Society of Civil Engineers.
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Received: Aug 23, 2015
Accepted: Jan 21, 2016
Published online: Apr 22, 2016
Discussion open until: Sep 22, 2016
Published in print: Oct 1, 2016
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