&lt;title&gt;Demo-application of shape memory alloy devices: the rehabilitation of the S. Giorgio Church bell tower&lt;/title&gt;

Indirli, M.; Castellano, M. G.; Clemente, Paolo; Martelli, A.

doi:10.1117/12.434126

Cited by 83 publications

(58 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The combined devices were anchored at the top and foundation of the tower and posttensioned with a prestressing force of 20 kN (80 kN total force). The retrofitting was verified by the occurrence of a similar EQ in 2000 with no damage of any type as explained in the works of Indirli et al (2001) and Castellano (2001). However, in both real applications the retrofitting was validated in qualitative terms with no numerical simulations.…”

Section: Seismic Retrofitting Of Historical Masonry Towerssupporting

confidence: 55%

Earthquake Protection of Colonial Bell Towers in Colima, Mexico with Externally Prestressed FRPs

Preciado

Budelmann

Bartoli

2015

International Journal of Architectural Heritage

View full text Add to dashboard Cite

Occidente se pone a disposición general bajo los términos y condiciones de la siguiente licencia: http://quijote.biblio.iteso.mx/licencias/CC-BY-NC-ND-2.5-MX.pdf (El documento empieza en la siguiente página)Mexico, characterized for being a high seismic area (M7.5). The 3D FE models are calibrated with experimental data and assessed through nonlinear static approaches including the seismic demand and an accurate validated masonry model. Based on an extensive parametric study on different configurations of old masonry towers, it is selected an optimal prestressing force and device. The Colonial towers are retrofitted with four prestressing devices of FRPs to convert them into a high energy-dissipative reinforced masonry. The external vertical prestressing is included at key points identified in the seismic vulnerability assessment. This technique is in compliance with the demand for architectural conservation and may be located without drilling and unbounded in order to be fully removable. The seismic performance is enhanced by increasing force, displacement and internal confinement. It is observed an upgrading of 35% and 20% of displacement capacity. With these results it is corroborated that external vertical prestressing allows a substantial increment of ductility for seismic energy dissipation purposes.

show abstract

Section: Seismic Retrofitting Of Historical Masonry Towerssupporting

confidence: 55%

Earthquake Protection of Colonial Bell Towers in Colima, Mexico with Externally Prestressed FRPs

Preciado

Budelmann

Bartoli

2015

International Journal of Architectural Heritage

View full text Add to dashboard Cite

show abstract

“…In one of the first reported retrofit applications using SMA devices, the San Giorgio chruch in Italy used bundles of SMA wires to refurbish the church structure after an earthquake event [64,69]. As shown in Fig.1.12, SMA devices were arranged in series in order to limit the forces to the masonry under the required limits and further seismic analysis were performed to analyze the performance of SMA devices [64,69].…”

Section: Civil Engineering Applicationsmentioning

confidence: 99%

“…As shown in Fig.1.12, SMA devices were arranged in series in order to limit the forces to the masonry under the required limits and further seismic analysis were performed to analyze the performance of SMA devices [64,69].…”

Section: Civil Engineering Applicationsmentioning

confidence: 99%

Introduction to Shape Memory Alloys

Rao

Srinivasa

Reddy

2015

Design of Shape Memory Alloy (SMA) Actuators

View full text Add to dashboard Cite

Classical materials like metals and alloys have played a significant role as structural materials for many centuries [1]. Engineers have designed components and selected alloys by employing the classical engineering approach of understanding the macroscopic properties of the material and selecting the appropriate one to match the desired functionality based on the application [2]. With advancements in material science and with increasing space and logistical limitations, scientists have been constantly developing high performing materials for various applications [2]. The everlasting goal for engineers in many cases is to improve product efficiency and reduce its weight without comprising on either its cost or performance. To achieve this goal, replacing multi-component and multi-material systems with fewer multifunctional light weight, high performing materials has been an attractive alternative [2,3]. Such advanced materials have played a leading role in the development of many engineering innovations and achievements like the Airbus A380, Boeing 787 Dreamliner, reliable fuel efficient cars, superior drug delivery devices, and so on, to list a few. The ingenious commercial products across various engineering disciplines are meeting all requirements by encompassing many of the latest technologies and meeting the challenges of tomorrow's needs.In pursuit of this, material scientists over the last few decades have focused on the possibility of tailoring the microstructure of the material to generate the required functionality for different applications [2,4]. Such an effort has resulted in an entire new area of active or multifunctional materials that posses more than one desirable property [5,6]. With the introduction of such materials, researchers are now focusing on how the combined microstructural changes of such materials are able to perform multiple functions. The integration of multiple functions like actuation, sensing, and control into a single structure using one or more material constituent is seen as a possibility [2,3]. Mamoda in her recent review of future materials discusses some application ideas with such materials like: a smart solar panel that can change its orientation automatically during the day depending on sun's position; a smart shock

show abstract

“…Indirli et al 17 used superelastic SMA tie bars to restore the S. Giorgio Church Bell-Tower, which was severely affected during Oct. 15th 1996 earthquake as shown in Fig.11. The SMA tie bars, that runs throughout the tower's height and fixed to its foundation helps in strengthening structure and also increases the modal frequencies.…”

Section: Structural Reinforcement For Earthquake Retrofitmentioning

confidence: 99%

State of Art Review of Shape Memory Alloy Used in Civil Structures as Seismic Control Device

.¹

2015

IJRET

View full text Add to dashboard Cite

Shape memory alloys (SMAs) are a kind of smart materials that "remember" their original shapes and can be utilized as an actuators that "change shape, stiffness, position, natural frequency and other mechanical characteristics in response to temperature or electromagnetic fields". SMAs exhibit two different phases i.e. martensite and austensite. Temperature and internal stresses (that play a role in super elasticity) determines the phases that SMA exhibits. The aim of this paper is to discuss about SMAs and its application in civil engineering structures like cable stayed bridges, elevated highway bridges, simply supported bridges and buildings as seismic control device. SMA is used as aactive, semi-active andpassive damper in civil structures. Passive damper has energy dissipation capacity and recentering ability. The recentering property areachieved by SMAs in austenite phase while dissipation ability of austenite is not so muchtherefore detwinning behaviour of SMA in martensite phase is considered increasing the damper's dissipating ability. NiTi SMAs showhigh level of superelastic hysteresis and energy dissipation and it solidify after transformation to stress-inducedMartensite, at roughly 6 to 8% strain. This property aremainly used for utilizing SMAs for hinge restrainer purposes for bridges. By using SMA's actuation property, Intelligent reinforced Concrete (IRC) was developed. IRC utilises strandedmartensite SMA wires for post tensioning and by monitoring electric resistance change of shape memory alloy wires, the strain allocation within concrete are obtained. If there is occurrence of cracks either by earthquakes or explosions, then by heating SMA wire strands results in its contraction and the cracks get reduced. It is observed from the study that SMA is effectively used as a seismic control device for civil structures.

show abstract

<title>Demo-application of shape memory alloy devices: the rehabilitation of the S. Giorgio Church bell tower</title>

Cited by 83 publications

References 0 publications

Earthquake Protection of Colonial Bell Towers in Colima, Mexico with Externally Prestressed FRPs

Earthquake Protection of Colonial Bell Towers in Colima, Mexico with Externally Prestressed FRPs

Introduction to Shape Memory Alloys

State of Art Review of Shape Memory Alloy Used in Civil Structures as Seismic Control Device

Contact Info

Product

Resources

About