Abstract
<p>Ultra-High Performance Fiber Reinforced Concrete (UHPFRC) is a relatively new generation of cementitious material exhibiting exceptional mechanical characteristics. One of the main applications of this new material is strengthening existing bridges and the construction of new Igirders during the rehabilitation process. Previous research on (UHPFRC) beam girders and prestressed girders found the analytical moment capacity to be 76% of the experimental (test) results. A method based on strain compatibility, equilibrium and the stress-strain relationships is developed to determine the flexural capacity of UHPFRC beams with about 90% accuracy between experimental and numerical capacities. A testing program of five beam specimens is conducted at Ryerson University Structural Laboratory to verify the experimental results. Furthermore, the results of the finite element numerical simulation of ABAQUS software using concrete damage plasticity (CDP) constitutive model predict the flexural capacity of the tested UHPFRC beams reasonably well.</p>
Highlights
1.1 BackgroundReinforced concrete structures are a composite material made up of concrete and embedded steel reinforcement that is used a lot in the construction industry
The experimental program in this research examines the flexural capacity of Ultra-High Performance Fiber Reinforced Concrete (UHPFRC) beams
Capturing the complete load-deformation graph of conventional concrete is a difficult task due to its brittle nature. This problem is resolved in UHPFRC by the inclusion of steel fibers which enhance the ductility of concrete and allows it to undergo both strain hardening and softening
Summary
1.1 BackgroundReinforced concrete structures are a composite material made up of concrete and embedded steel reinforcement that is used a lot in the construction industry. In order to enhance the tensile strength of concrete structures, steel reinforcement is used to build efficient structures. Steel fibers improve the tensile and compressive strength of concrete in addition to enhancing the post-cracking characteristics. We present an overview of the full experimental procedure including formwork preparation, placement of reinforcing steel, mixing, casting, curing, and the testing procedure. The following sections will discuss the experimental results and observations, followed by an investigation of the moment capacity of various building code design guidelines and other design models found in literature. The concrete and reinforcing steel are represented by different built-in material models. Though, once combined they describe the composite behaviour of reinforced concrete (RC). The following sections present a detailed overview for modeling and calibrating FE models
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