Self-repairing performance of concrete beams strengthened using superelastic SMA wires in combination with adhesives released from hollow fibers

Kuang, Yachuan; Ou, Jinping

doi:10.1088/0964-1726/17/2/025020

Cited by 95 publications

(42 citation statements)

References 12 publications

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“…Therefore, Kuang and Ou [42,43] combined this approach with a mechanism to reduce the crack width. They included both SMA wires and continuous adhesive filled glass tubes.…”

Section: Approaches To Self-healingmentioning

confidence: 99%

Self-Healing in Cementitious Materials—A Review

2013

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Concrete is very sensitive to crack formation. As wide cracks endanger the durability, repair may be required. However, these repair works raise the life-cycle cost of concrete as they are labor intensive and because the structure becomes in disuse during repair. In 1994, C. Dry was the first who proposed the intentional introduction of self-healing properties in concrete. In the following years, several researchers started to investigate this topic. The goal of this review is to provide an in-depth comparison of the different self-healing approaches which are available today. Among these approaches, some are aimed at improving the natural mechanism of autogenous crack healing, while others are aimed at modifying concrete by embedding capsules with suitable healing agents so that cracks heal in a completely autonomous way after they appear. In this review, special attention is paid to the types of healing agents and capsules used. In addition, the various methodologies have been evaluated based on the trigger mechanism used and attention has been paid to the properties regained due to self-healing.

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“…Therefore, Kuang and Ou [42,43] combined this approach with a mechanism to reduce the crack width. They included both SMA wires and continuous adhesive filled glass tubes.…”

Section: Approaches To Self-healingmentioning

confidence: 99%

Self-Healing in Cementitious Materials—A Review

2013

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“…Kuang and Ou and Li et al found that the SMA wire as reinforcing bar can make cracks close and perform the task of emergency damage repair in concrete structures. The cracks are closed due to the super elastic behavior of embedded SMAs (as shown in Figure 26) (Kuang and Ou, 2008;Li et al, 2006a). Schlangen and Sangadji developed self-healing asphalt concrete by embedding tiny steel fibers and using induction energy.…”

Section: Autonomous Self-healing Concrete and Structuresmentioning

confidence: 99%

Smart concretes and structures: A review

Han

Wang

Dong

et al. 2015

Journal of Intelligent Material Systems and Structures

Self Cite

214

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Smart concretes and structures are intelligent systems that have properties different from normal concrete, such as selfsensing and self-healing properties, or have the ability to react upon an external stimulus, such as stress and temperature. The ''smartness'' of concrete and structures is achieved through material composition design, special processing, introduction of other functional components, or modification of the microstructure. They are designed to meet specific requirements through tailored properties for improving serviceability, safety, reliability, longevity, and durability of the infrastructures and reducing the life-cycle costs of the infrastructures. This article reviews the recent researches of various smart concretes and structures, with attentions to their principles, fabrication, and properties. Future challenges in the development and applications of smart concretes and structures are also discussed.

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“…The study showed the bending behaviour of a superelastic bar in reversed cyclic loadings and the estimation of the stiffness and damping ratio. Researchers have also used the superelastic property of SMAs for selfrepairing of concrete beams (Kuang and Ou, 2008). For RC columns, superelastic SMA bars replaced steel reinforcements in the plastic hinge region to reduce the residual displacement in RC columns (Saiidi and Wang, 2006).…”

Section: Introductionmentioning

confidence: 99%

Seismic protection of lap-spliced RC columns using SMA wire jackets

Choi

Chung

Choi

et al. 2012

Magazine of Concrete Research

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This study used two forms of shape memory alloy (SMA) wires, nickel-titanium-niobium (NiTiNb) and nickletitatanium (NiTi), to retrofit reinforced concrete (RC) columns with lap splices. NiTiNb shape memory alloys are considered to show a wider temperature window compared with NiTi shape memory alloys and thus may be beneficial for applications in the area of civil structures. The goals of this study are to assess the mechanical behaviour of the two shape memory alloy wires and investigate the seismic performance of the shape memory alloy wire jackets for reinforced concrete columns with lap splices. First, the study investigates the recovery and the residual stress of NiTiNb and NiTi shape memory alloy wires. This study also evaluates the behaviour of the NiTiNb shape memory alloy wire under residual stresses. The results indicate that the shape memory alloy wire jackets show good performance for reinforced concrete columns with lap splices. The shape memory alloy wire jackets increase the ductile behaviour of the lap-spliced columns without strength degradation. The results show that their performance is superior to that of the RC column with continuous reinforcements. The study shows that the NiTiNb shape memory alloy wire jackets are more adaptive for retrofit of RC columns than the NiTi shape memory alloy wire jackets since the NiTiNb shape memory alloy shows more appropriate temperature windows for the applications of shape memory alloys in civil structures.

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Self-repairing performance of concrete beams strengthened using superelastic SMA wires in combination with adhesives released from hollow fibers

Cited by 95 publications

References 12 publications

Self-Healing in Cementitious Materials—A Review

Self-Healing in Cementitious Materials—A Review

Smart concretes and structures: A review

Seismic protection of lap-spliced RC columns using SMA wire jackets

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