000012775 001__ 12775
000012775 005__ 20160920162645.0
000012775 04107 $$aeng
000012775 046__ $$k2016-09-05
000012775 100__ $$aIsmail, M.
000012775 24500 $$aExperimental investigations on the direct-shear capacity of cracked UHPFRC

000012775 24630 $$n6.$$pInsights and Innovations in Structural Engineering, Mechanics and Computation
000012775 260__ $$bTaylor and Francis Group, London, UK
000012775 506__ $$arestricted
000012775 520__ $$2eng$$aThe determination of post cracking direct-shear capacity of UHPC reinforced with steel fibers (UHPFRC) is crucial for predicting the ultimate capacity and the deformation behavior of structural members subjected to shear and torsional forces. For the sake of determining the post cracking shear capacity, experimental investigations on small size notched UHPFRC prisms were carried out. Two volumetric ratios of steel fibers were used in the test program, which are 0.5% and 0.9%. Steel fibers having length, diameters and tensile strength of 17 mm, 0.15 mm and 2500 MPa respectively were used. At first, axial tensile force was applied to the UHPC prism to introduce a crack with a desired crack width, thereafter shear force was applied parallel to the faces of the introduced crack. Diagrams of the post cracking shear stress against shear displacement were plotted and are presented in this paper. Test results showed that the post cracking shear capacity increases as the crack width decreases. Several shear transmission mechanisms were noticed during the conduction of the test program. Average curves to describe the degradation of the shear strength and stiffness are also presented.

000012775 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000012775 653__ $$a

000012775 7112_ $$aSixth International Conference on Structural Engineering, Mechanics and Computation$$cCape Town, South Africa$$d2016-09-05 / 2016-09-07$$gSEMC2016
000012775 720__ $$aIsmail, M.$$iFehling, E.
000012775 8560_ $$ffischerc@itam.cas.cz
000012775 8564_ $$s1502116$$uhttp://invenio.itam.cas.cz/record/12775/files/223.pdf$$yOriginal version of the author's contribution as presented on CD, 223.pdf.
000012775 962__ $$r12552
000012775 980__ $$aPAPER