Experimental study on enhancement of self-restoration of concrete beams using SMA wire

Sakai, Y.; Kitagawa, Yoshikazu; Fukuta, Toshibumi; Iiba, Masanori

doi:10.1117/12.482680

Cited by 41 publications

(18 citation statements)

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“…Shape memory alloy (SMA) exhibits stable superelasticity above a reverse transformation finish temperature, and therefore can adequately work as a superelastic material to handle macro-size cracks for structural use in buildings [8][9][10][11]. This motivates us to develop a type of a smart self-repairing concrete to increase the survivability in the case of earthquakes and typhoons, and maintain structural durability by regaining mechanical properties (repairing) and water tightness (sealing) of concrete structures, in combination with the deflection selfrestoration characteristics of the SMA wires and the adhesive due to the cohering characteristic.…”

Section: Introductionmentioning

confidence: 99%

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

Kuang

2008

Smart Mater. Struct.

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By taking advantage of the superelastic effect of shape memory alloy (SMA) and the cohering characteristic of repairing adhesive, a smart self-repairing concrete beam with damage self-repairing performance has been developed. In order to verify the potential self-repairing capacity of smart concrete beams reinforced with SMA wires and brittle fibers containing adhesives, static loading tests were conducted. Experimental results show that the superelastic SMA wires added self-restoration capacity to concrete beams, the deflection of the beams reversed and the crack closed almost completely after unloading. After the release of adhesive from the broken-open fibers into the cracks from the first loading, stress was redistributed to the uncracked section where a new crack was formed, while the sealed crack remained closed during reloading for the smart concrete beams reinforced with SMA wires and brittle fibers containing adhesives. While the original cracks experienced reopening, the load was carried directly by the wires during reloading for concrete beams reinforced with SMA wires.

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Section: Introductionmentioning

confidence: 99%

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

Kuang

2008

Smart Mater. Struct.

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“…Allowing the introduction of minimum inputs such as electrification or heating could greatly increase the selection of devices that can be used. A crack-closure system using Shape Memory Alloy (SMA) was proposed by Sakai et al (2003). They used SMA as main reinforcing bars for concrete beams in order for large cracks under loading to be mechanically closed after unloading, although total crack closure was elusive.…”

Section: Active Self-repairingmentioning

confidence: 99%

Development of Engineered Self-Healing and Self-Repairing Concrete-State-of-the-Art Report

Mihashi

Nishiwaki

2012

ACT

164

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Challenging studies of engineered self-healing and self-repairing functions in concrete structures are briefly reviewed. While self-healing of concrete has been studied for a long time, it was only recently noticed that some engineered technologies are useful to stimulate the potential of concrete to be self-healed. For example, fiber reinforced cementitious composites (FRCC) have a much higher potential of self-healing than ordinary concrete because of their capability to keep cracks thinner and also because of the bridging network system in cracks; a specific bio-chemical approach, i.e. the application of mineral-precipitating bacteria, is now available; and various mineral admixtures are useful for practical application. Furthermore, the new concept of self-repairing concrete, which is based on the design concept of intelligent materials, is reported. Self-repairing concrete is concrete that incorporates devices for achieving the three key functions of an intelligent material, (1) sensing, (2) processing, and (3) actuating. This paper is a state-of-the-art report on the recent development of engineered self-healing and self-repairing concrete.

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“…This application uses the shape restoration property of superelastic SMA wires. For example, Sakai et al [31] researched self-restoration of a concrete beam using superelastic SMA wires. The experimental results revealed that the mortar beam with SMA wires recovers almost completely after incurring an extremely large crack.…”

Section: Shape Restoration Using Superelastic Smasmentioning

confidence: 99%

Review of Applications of Shape Memory Alloys in Civil Structures

Song

2004

Engineering, Construction, and Operations in Challenging Environments

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Shape memory alloy (SMA) is a novel functional material and has found increasing applications in many areas. Recently, research efforts have been extended to using SMA for control of civil structures. This paper presents a review of applications of the SMA materials for passive, active and semi-active controls of civil structures. First, an overview of the characteristics of SMA is presented. The shape memory effect (SME) and pseudoelasticity, two major properties of SMA associated with the thermal-induced or stress-induced reversible hysteretic phase transformation between austenite and martensite, are reviewed. These unique properties enable SMA to be used as actuators, passive energy dissipators and dampers for civil structure control. This paper then reviews current research using SMA-based devices for passive, semi-active or active control of civil structures. The operation mechanism, design and experimental results of these SMA-based devices are also presented in the paper.

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Experimental study on enhancement of self-restoration of concrete beams using SMA wire

Cited by 41 publications

References 0 publications

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

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

Development of Engineered Self-Healing and Self-Repairing Concrete-State-of-the-Art Report

Review of Applications of Shape Memory Alloys in Civil Structures

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