Abstract
In order to study the influencing factors of the flexural capacity of ultra high performance concrete with coarse aggregate (UHPC-CA) beams with high strength reinforcement, the orthogonal test method was used to analyze the influence of reinforcement grade, reinforcement diameter, section effective height and concrete strength grade on the flexural capacity of UHPC-CA beams with high strength reinforcement. The results show that the diameter of reinforcement is an important significant factor affecting the flexural capacity of UHPC-CA beams with high-strength reinforcement, and the grade of reinforcement and the effective height of section are general significant factors. With the increase of the three factors, the flexural capacity of the beam is gradually improved. The influence of concrete strength grade on the flexural capacity of UHPC-CA beams with high-strength reinforcement is small. With the increase of concrete strength grade, the flexural capacity first decreases slightly and then increases slightly. The effect of reinforcement ratio on flexural capacity of UHPC-CA beams with ordinary strength reinforcement is greater than that of UHPC-CA beams with high strength reinforcement.
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