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Showing 1 to 20 of 46 for “"UHPC"”.
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A Softened Membrane Model for UHPC (SMM-UHPC)
… the shear behavior of Ultra-High-Performance (UHPC) is crucial to prevent undesired responses that could be induced by diagonal shear cracks. Hence, the ability of analytical models to predict shear responses of UHPC members is of paramount importance. This issue is addressed in this thesis by …
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Characterization of Punching Shear Capacity of Thin Uhpc Plates
UHPC (ultra-high performance concrete) is a relatively new type of concrete that exhibits mechanical properties that are far superior to those of conventional concrete and in some cases rival those of steel. The main characteristics that distinguish UHPC from conventional reinforced concrete are …
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Numerical Modeling of UHPC using a Concrete Damage Plasticity Model
Ultra-High Performance Concrete (UHPC) is a type of concrete that is known for its high compressive strength, elastic-plastic or strain hardening tensile behavior, and enhanced material ductility and toughness. These properties are achieved through the use of a low water-to-binder ratio, optimized …
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A New CFRP-UHPC System for Strengthening Reinforced Concrete T-Beams
… after which an Ultra High performance Concrete (UHPC) overlay is then cast on top of the CFRP. The hypothesis of this technique is that the very high compressive strength of the UHPC overlay will push the neutral axis up and allow the CFRP laminates to be under tension. Four RC beams were cast …
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Strengthening reinforced concrete slabs using a combination of CFRP and UHPC
… combination of ultra high performance concrete (UHPC) and FRP. Using this combination, FRP can be applied to the top side, compression side, of the slab. The hypothesis is that the implementation of the UHPC overlay will push the neutral axis up to the UHPC overlay, allowing the FRP to act as a …
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Experimental study of UHPC with high fire resistance and meso-scale modelling
… Damage made to ultra-high performance concrete (UHPC) by fire or high temperature is usually severer than normal strength concrete (NSC) or high performance concrete (HPC) due to its compact internal structure. For example, strength loss of UHPCs can reach up to 80% after exposure to 800 °C and …
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Investigation of UHPC Columns for Stress-Strain Behaviour, Economic and Environmental Feasibility
Ultra High Performance Concrete (UHPC) also known as Reactive Powder Concrete (RPC) was developed by in France circa 1995 (Richard & Cheyrezy, 1995). The most notable characteristics of RPC are its mechanical properties, which are an “ultra high” compressive strength (𝑓′𝑐 ≥ 150 𝑀𝑃𝑎), a high …
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Evaluation of Elastic-Plastic and Damage Models for Ultra High Performance Concrete (UHPC)
<p>Ultra-high performance concrete (UHPC) has been developed in recent decades as a new class of concrete which exhibits increased strength, durability and long-term stability when compared with normal strength concrete (NSC) and high performance concrete (HPC). While extensive research has …
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Optimization of Highway Bridge Girders for Use with Ultra-High Performance Concrete (UHPC)
Ultra High Performance Concrete (UHPC) is a class of cementitious materials that share similar characteristics including very large compressive strengths, tensile strength greater than conventional concrete and high durability. The material consists of finely graded cementitious particles and …
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Prediction of early-age cracking of UHPC materials and structures : a thremo-chemo-mechanics approach
Ultra-High Performance Concrete [UHPC] has remarkable performance in mechanical properties, ductility, economical benefit, etc., but early-age cracking of UHPC can become an issue during the manufacturing process due to the high cement content and the highly exothermic hydration reaction. Because …
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Biaxial Behavior of Ultra-High Performance Concrete and Untreated UHPC Waffle Slab Bridge Deck Design and Testing
Ultra-high performance concrete (UHPC) was evaluated as a potential material for future bridge deck designs. Material characterization tests took place to identify potential challenges in mixing, placing, and curing UHPC. Biaxial testing was performed to evaluate behavior of UHPC in combined …
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Experimental Compressive Behavior and Numerical Modeling of Unconfined and Confined Ultra-High Performance Concrete
Ultra-high performance concrete (UHPC) is commonly defined as a cementitious material, reinforced by fiber, which has compressive and sustained post-cracking tensile strength of more than 21.7 ksi (150 MPa) and 0.72 ksi (5 MPa), respectively. The outstanding mechanical behavior of UHPC is owed to …
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Design and performance of cost-effective ultra-high performance concrete for prefabricated elements
… cost-effective ultra-high-performance concrete (UHPC) incorporating high volume of supplementary cementitious materials and conventional concrete and masonry sands; (2) developed UHPC with adapted rheology incorporating lightweight sand, hybrid fibers, and nanomaterials with improved properties; …
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DESIGN AND PERFORMANCE OF SELF-CONSOLIDATING AND THIXOTROPIC ULTRA-HIGH-PERFORMANCE CONCRETE FOR INFRASTRUCTURE CONSTRUCTION AND REHABILITATION
… two classes of ultra-high-performance concrete (UHPC), one with self-consolidating consistency and the other with improved thixotropy. Tailoring the rheological properties of low yield stress UHPC can improve dispersion and orientation of steel fibers used in the design of UHPC, hence enhancing …
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Characterizing the Shear Behavior of Ultra-High-Performance Concrete through the Universal Panel Tester
… behavior of Ultra-High-Performance Concrete (UHPC), especially under the effects of axial loads and varying scales, poses challenges to the formulation of reliable design models. Although UHPC is being utilized in structural applications, its complex behavior under combined stress states and …
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Model-based optimization of ultra high performance concrete highway bridge girders
Ultra High Performance Concrete (UHPC) represents a breakthrough for civil engineering materials. Compared to conventional concrete solutions, UHPC possesses such dramatic mechanical improvements that new design philosophies, safe guidelines, and design tools for UHPC structures are required to …
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Design and performance of cost-effective ultra high performance concrete for bridge deck overlays
… cost-effective ultra-high performance concrete (UHPC) for bonded bridge deck overlays. The high durability and mechanical properties of such repair material can offer shorter traffic closures and prolong the service life of the pavement. The UHPC was optimized using supplementary cementitious …
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Ultra-High Performance Concrete Shear Walls in Tall Buildings
… of using ultra-high performance concrete (UHPC) for shear walls in tall buildings considering structural efficiency and environmental sustainability. The Lattice Discrete Particle Model (LDPM) was used to simulate the response to failure of concrete shear walls without web steel bar …
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Design of wind turbines with Ultra-High Performance Concrete
Ultra-High Performance Concrete (UHPC) has proven an asset for bridge design as it significantly reduces costs. However, UHPC has not been applied yet to wind turbine technology. Design codes do not propose any recommendations or guidance for the towers, thus encouraging the engineer to use less …
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