Structural behavior of ultra high performance concrete beams subjected to bending

Ultra high performance concrete (UHPC) exhibits improved performance compared to conventional concrete. Various experimental tests on structural behavior are of importance in order to establish reasonable design specifications for UHPC. Therefore, this study provides a detailed presentation of experimental test results for the flexural behavior of ultra high performance concrete beams. The experimental parameters included the amount of rebar and the placing method for the UHPC. The flexural behavioral characteristics were examined with respect to test results on UHPC beams with rebar ratios less than 0.02 and steel fibers with a volumetric ratio of 2%. Steel fiber-reinforced UHPC proves to be effective at controlling cracks and exhibits ductile behavior with a ductility index ranging between 1.60 and 3.75. In addition, the method of placing UHPC affects the flexural behavior with regard to the orientation of the steel fibers. The results of this study provide valuable data that can be used in future studies on the development of computational models of the deflection and flexural behavior of UHPC.

[1]  J.G.M. van Mier.  Cementitious Composites with High Tensile Strength and Ductility through Hybrid Fibres , 2004 .

[2]  Giuseppe Campione,et al.  Fibrous reinforced concrete beams in flexure : Experimental investigation, analytical modelling and design considerations , 2008 .

[3]  Jcm Ho,et al.  Post-peak behavior and flexural ductility of doubly reinforced normal- and high-strength concrete beams , 2001 .

[4]  Bernard Espion.  Discussion on "Flexural analysis of reinforced concrete beams containing steel fibers" , 1994 .

[5]  P. Richard,et al.  Composition of reactive powder concretes , 1995 .

[6]  T Sedran,et al.  Optimization of ultra-high-performance concrete by the use of a packing model , 1994 .

[7]  Lucie Vandewalle,et al.  RILEM TC 162-TDF: Test and design methods for steel fibre reinforced concrete: bending test , 2002 .

[8]  Lucie Vandewalle,et al.  RILEM TC 162-TDF: Test and design methods for steel fibre reinforced concrete' - sigma-epsilon-design method - Final Recommendation , 2003 .

[9]  Qian Chun-xiang,et al.  Properties of high-strength steel fiber-reinforced concrete beams in bending , 1999 .

[10]  Lucie Vandewalle,et al.  RILEM TC162-TDF : Test and Design Methods for Steel Fibre Reinforced Concrete : Bending Test, "Technical Recommendation" , 2002 .

[11]  Bruce E. Ankenman,et al.  EFFECT OF FIBER DISPERSION ON MULTIPLE CRACKING OF CEMENT COMPOSITES , 2001 .

[12]  Tai-Kuang Lee,et al.  Estimating the relationship between tension reinforcement and ductility of reinforced concrete beam sections , 2003 .

[13]  Parviz Soroushian,et al.  DISTRIBUTION AND ORIENTATION OF FIBERS IN STEEL FIBER REINFORCED CONCRETE , 1990 .

[14]  Benjamin A. Graybeal,et al.  Material Property Characterization of Ultra-High Performance Concrete , 2006 .

[15]  B. Espion,et al.  De l'utilisation de fibres métalliques comme armature complémentaire de poutres en béton armé soumises à flexion , 1993 .

[16]  Afgc,et al.  Bétons fibrés à ultra-hautes performances , 2002 .

[17]  Samir A. Ashour,et al.  Effect of the concrete compressive strength and tensile reinforcement ratio on the flexural behavior of fibrous concrete beams , 2000 .

[18]  Shuaib H. Ahmad,et al.  Flexural Behavior of Reinforced High-Strength Lightweight Concrete Beams , 1991 .

[19]  E. Brühwiler,et al.  Development of the mechanical properties of an Ultra-High Performance Fiber Reinforced Concrete (UHPFRC) , 2006 .

[20]  Gilles Pijaudier-Cabot,et al.  Experimental characterization of the self-healing of cracks in an ultra high performance cementitious material: Mechanical tests and acoustic emission analysis , 2007 .

[21]  Sergio M.R. Lopes,et al.  Neutral Axis Depth versus Flexural Ductility in High-Strength Concrete Beams , 2004 .

[22]  二羽 淳一郎,et al.  Recommendations for design and construction of ultra high strength fiber reinforced concrete structures (draft) , 2006 .

[23]  Byung H. Oh.  Closure of "Flexural Analysis of Reinforced Concrete Beams Containing Steel Fibers" , 1994 .

[24]  O. Plé,et al.  Preliminary study of multiscale analysis in fibre reinforced concrete , 2002 .

[25]  Samir A. Ashour,et al.  FLEXURAL BEHAVIOR OF HIGH-STRENGTH FIBER REINFORCED CONCRETE BEAMS , 1993 .

[26]  Pierre-Claude Aitcin,et al.  Cements of yesterday and today Concrete of tomorrow , 2000 .

[27]  B. Oh,et al.  Experimental and theoretical investigation on the shear of steel fibre reinforced concrete beams , 1999 .

[28]  Antoine E. Naaman,et al.  Proposed classification of HPFRC composites based on their tensile response , 2007 .

[29]  Byung Hwan Oh,et al.  FLEXURAL ANALYSIS OF REINFORCED CONCRETE BEAMS CONTAINING STEEL FIBERS. DISCUSSION AND CLOSURE , 1992 .