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Civil-Comp Proceedings
ISSN 1759-3433
CCP: 93
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Paper 80

A Predictive Model for In-Plane Shear Behaviour of Fiber-Reinforced Cementitious Composites

C.-G. Cho1, M. Kwon2, J.-S. Kim1, C.-H. Cho1, M.-H. Yoo1, S.-J. Lee1 and Y.-S. Shin1

1School of Architecture, Chosun University, South Korea
2Department of Civil Engineering, Gyeongsang National University, South Korea

Full Bibliographic Reference for this paper
C.-G. Cho, M. Kwon, J.-S. Kim, C.-H. Cho, M.-H. Yoo, S.-J. Lee, Y.-S. Shin, "A Predictive Model for In-Plane Shear Behaviour of Fiber-Reinforced Cementitious Composites", in , (Editors), "Proceedings of the Tenth International Conference on Computational Structures Technology", Civil-Comp Press, Stirlingshire, UK, Paper 80, 2010. doi:10.4203/ccp.93.80
Keywords: fiber-reinforced cementitious composites, in-plane shear, modified compression field theory, cracked behavior.

The current study emphasizes the development of a nonlinear model for the in-plane shear behaviour of high-performance fiber-reinforced cementitious composite (HPFRC) materials. To model the shear behaviour of HPFRC materials, the original modified compression field theory for conventional reinforced concrete panels has been newly revised. In the model, the high-ductile tensile behaviour of cracked HPFRC is idealized with multiple micro-cracking behaviour of HPFRC. Moreover, the compressive strain-softening characteristic of the cracked HPFRC and the shear transfer mechanism in the cracked interface of the HPFRC element are also treated in the model. The current model has been newly developed to focus on the following three important characteristics of cracked HPFRC elements: the compressive strength reduction effect of HPFRC panels varying with the lateral tensile strain of a cracked element, high ductile performance characteristic of HPFRC subject to tensile strain after cracking, and transmission of shear stresses across a cracked HPFRC surface under compressive stress.

A series of experiments were examined to assess the in-plane shear behaviour of HPFRC materials and the current model has a good agreement with the experimental results. From a comparison with reinforced concrete panels, reinforced HPFRC panels showed more improved in-plane shear strength and post peak shear behaviour. This is attributed to the high performance characteristic of HPFRC providing an advantage in improving the in-plane shear strength and shear performance of HPFRC panels, compared with normal concrete panels.

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