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Flexural Strengthening of Over-reinforced Concrete Beams with Highly Ductile Fiber-reinforced Concrete Layer by Mingke Deng; Min Zhang; Fudong Ma; Fangyuan Li; Hongzhe Sun is a Engineering article available to read on EtoBox.

What is Flexural Strengthening of Over-reinforced Concrete Beams with Highly Ductile Fiber-reinforced Concrete Layer about?

This study investigates the effectiveness of highly ductile fiber-reinforced concrete (HDC), which is characterized by its high ultimate compressive strain ability, in improving the failure mode and deformational characteristics of over-reinforced concrete beams. The flexural behavior of over-reinforced concrete beams strengthened with HDC was experimentally investigated. The variables included the tensile longitudinal steel reinforcement ratio, thickness of the layer, strengthening materials, and strengthening methods. The crack pattern, failure mode, load-deflection responses, flexural capacity, ductility, and strain were investigated. The experimental results indicated that applying HDC to strengthen the compression zone of an over-reinforced concrete beam is a highly effective method to change its brittle failure and improve the ductility. HDC-strengthened beams showed an increase in flexural capacity and deformation compared to normal concrete-strengthened beams with equal strengthening thickness. A better deformation capacity can be achieved by using a larger thickness of the strengthening layer, ensuring the coordination between the strengthening layer and the existing beam.

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Author

Mingke Deng; Min Zhang; Fudong Ma; Fangyuan Li; Hongzhe Sun

Publisher

Elsevier BV

Published

2021

Language

EN

Field

Engineering (Physical Sciences)