Investigations on the scattering in the post cracking tensile behaviour of UHPFRC
Abstract eng: This contribution presents research on the scattering in the post cracking tensile behaviour of Ultra-High Performance Fibre Reinforced Concrete (UHPFRC). The main objective of this work is to determine the essential influence factors for the scattering in the post cracking tensile behaviour. The experimental programme includes 8 series of four-point bending tests, 48 specimens in total, varying the cross-sectional geometry, steel fibre type and fibre content. Each test series consists of 6 specimens. In order to exclude influences caused by the production and casting of UHPFRC, the specimens of one series were always cast in a continuous beam (length 4.2 m) and cut out later. To gather information on the fibre orientation and distribution, slices were cut from each specimen after its bending test. By using an opto-analytic method it was found that the detected number of fibres in the section varies widely among all specimens, while the fibre orientation is almost uniform. The results of the experimental programme show decreasing scattering with increasing fibre content and cross-section area. Further, a statistical model to predict the scattering in the post cracking tensile behaviour has been developed and is presented.
Contributors:
Publisher:
Taylor and Francis Group, London, UK
Conference Title:
Conference Title:
Sixth International Conference on Structural Engineering, Mechanics and Computation
Conference Venue:
Cape Town, South Africa
Conference Dates:
2016-09-05 / 2016-09-07
Rights:
Text je chráněný podle autorského zákona č. 121/2000 Sb.
Record appears in:
Record created 2016-09-20, last modified 2016-09-20
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