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Keywords: fiber-reinforced cementitious composites, in-plane shear, modified compression field theory, cracked behavior.

Summary

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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Front Page Browse CCP CSETS CTR IJRT Other Authors Search Purchase Guide FAQ Contact us	Civil-Comp Proceedings ISSN 1759-3433 CCP: 93 PROCEEDINGS OF THE TENTH INTERNATIONAL CONFERENCE ON COMPUTATIONAL STRUCTURES TECHNOLOGY Edited by: 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 doi:10.4203/ccp.93.80 purchase the full-text of this paper 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. Summary 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. purchase the full-text of this paper (price £20) go to the previous paper go to the next paper return to the table of contents return to the book description purchase this book (price £145 +P&P)
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