The utilization of unbounded external reinforcing bars is one of the strengthening methods used after loading stage and before failure. The method has been used in different forms to strengthen members of reinforced concrete structures. To investigate the effect of utilization of post-tensioned reinforcing bars in this method of strengthening, a number of reinforced concrete beams was tested. S...

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Carbonfiber-reinforced polymer (CFRP) composites are frequently utilized in the repair and reinforcement of reinforced concrete members because they more corrosion-resistant, durable, flexible than commonly used materials like steel plates. Many studies have demonstrated that use CFRP as an internal strengthening material has a substantial impact on shear capacity RC beams. This research looks ...

Corrosion of steel reinforcement is the major cause deterioration in reinforced concrete structures. Strengthening structures has been widely studied. However, most research was conducted on sound without considering effects corrosion. This paper presents an experimental study feasibility using externally bonded FRP laminates combined with U-jackets, applied directly repairing deteriorated cove...

This paper aims to introduce the content of Annex J “Strengthening Existing Concrete Structures with CFRP” Eurocode 2 [1]. is first time that design adhesively bonded reinforcement CFRP has been introduced in European regulations through an informative annex. considers two different strengthening techniques: externally (EBR) consists bonding strips or sheets surface concrete elements, and near ...

Many civil applications use square hollow sections (SHSs) as members in beam-column connections which can be vulnerable under cyclic loading. Cyclic loadings from earthquakes, wind, waves and currents affect onshore offshore infrastructure. In addition, these become structurally inadequate through incremental service loads, design/fabrication errors material property degradation over time. Due ...

Existing deteriorated reinforced concrete (RC) structures need strengthening to extend service life. Fibre polymer (FRP) has been widely used strengthen sound structures, but its application on damaged still needs be investigated. This paper presents non-linear finite element analyses conducted assess the flexural behaviour of corrosion-damaged RC beams strengthened with externally bonded FRP. ...

Externally bonded carbon fiber reinforced polymer (CFRP) laminates are a feasible and economical alternative to traditional methods for strengthening and stiffening deficient reinforced concrete and prestressed concrete girders as shown in Fig. (1). Although extensive research has already been undertaken to investigate the behavior of CFRP strengthened bridge girders, the majority of work condu...

The present study examines the shear performance and modes of failure of rectangular simply supported reinforced concrete (RC) beams designed with shear deficiencies. These members were strengthened with externally bonded carbon fiber reinforced polymer (CFRP) sheets and evaluated in the laboratory. The experimental program consisted of twelve full-scale RC beams tested to fail in shear. The va...

There is a growing need for the rehabilitation, repair, and upgrading of concrete structures such as bridges and buildings. The repair or rehabilitation of reinforced concrete structures often offers a lower cost alternative to rebuilding, and it is traditionally achieved by bonding steel plates to the tensile face of a reinforced concrete member. The shear strength can be enhanced with plates ...