Behavior of Full-Scale Damaged Beams Repaired Using a Steel Reinforced Polymer (SRP) Technique

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Title: Behavior of Full-Scale Damaged Beams Repaired Using a Steel Reinforced Polymer (SRP) Technique

Author(s): Hayder Alghazali, Zuhair Al-Jaberi, Zena Aljazaeri, John J. Myers

Publication: Special Publication

Volume: 331

Issue:

Appears on pages(s): 122-135

Keywords: Steel reinforced polymer (SRP); Damaged beams; Flexural strength; Confinement; Lap splice zone.

Date: 2/1/2019

Abstract:
Structures may need to be repaired for different reasons, such as, construction or design defects, or service stage changing which include, ageing of structures or deterioration due to exposure to aggressive environmental conditions. New materials are emerging, such as steel reinforced Polymer (SRP) composite, which can be used to strengthen and repair structures with greater durability and less maintenance over the life of the structure. An experimental test program was carried out to investigate the performance of repaired damaged concrete beams with (SRP) repair technique. Six full-scale reinforced concrete (RC) beams were designed and tested using 4-point load test setup to be failed in lap splice in the middle region of the beam. The damaged concrete was repaired, and SRP sheet (longitudinal soffit laminates and transverse U-wrapping strips) was applied to restore the original flexural capacity. All beams were 10 ft (3.0 m) in length, 18 in. (457 mm) in depth, and 12 in. (305 mm) in width. Different repairing configurations were investigated. The studied variables were the number of plies and the amount and distribution of U-wrapping strips. Ultimate load capacity, deflection, and mode of failure were recorded during testing. The test results were compared to beam results with continuous reinforcement. It was concluded that repairing beams with SRP plies and U-wrapping strips can restore the beam to a capacity similar to that of reinforced concrete (RC) beam with continuous reinforcement.