Feasibility of mechanical post-tensioning of annealed glass beams by activating externally bonded Fe-SMA reinforcement

Rocha, Jorge; Pereira, Eduardo; Sena-Cruz, José

doi:10.1016/j.conbuildmat.2022.129953

Cited by 18 publications

(3 citation statements)

References 42 publications

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“…Rocha et al [10] utilized bonded Fe-SMA strips at the bottom of glass beams, and employed the electrical resistance heating to generate prestress. The load capacity and ductility were improved.…”

Section: Strengthened Glass Beamsmentioning

confidence: 99%

Prediction of prestress level in steel structures strengthened by bonded Fe‐SMA strips

Li,

Wang,

Chatzi

et al. 2023

ce papers

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Previous studies have demonstrated a great potential of prestressed strengthening of steel structures employing iron‐based shape memory alloys (Fe‐SMAs). A bonded Fe‐SMA strengthening solution has been proposed with partial activation, in which the prestrained Fe‐SMA strip is fully bonded onto the steel structure, and the middle region of the Fe‐SMA strip is heated to generate prestress. The two ends remain unheated and transfer the prestress to the parent structure. In this study, a column model and a beam model are developed to analyze the prestress level in the steel structures strengthened by bonded Fe‐SMA. The predicted strains in the parent structure are in excellent agreement with the experimental measurement from the literature.

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Section: Strengthened Glass Beamsmentioning

confidence: 99%

Prediction of prestress level in steel structures strengthened by bonded Fe‐SMA strips

Li,

Wang,

Chatzi

et al. 2023

ce papers

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“…De Santis et al obtained the behavior effects of composite glulam beams with circular holes [11]. Rocha et al presented the structural concept of post-tensioned Fe-SMAs glass systems [12]. Bui et al investigated transient responses and natural frequencies of sandwich beams with inhomogeneous functionally graded (FG) cores [13].…”

Section: Introductionmentioning

confidence: 99%

Mechanical Property Research for CSIP Thin-Wall Box-Beams

Li,

Uddin,

Zhao

et al. 2023

Buildings

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Composite structural insulated panels (CSIPs) are eco-friendly, high-performance materials, which not only good have mechanical properties, but also good waterproof, moisture-proof, fire-proof, and anti-corrosion characteristics, so they have been used to build envelope structures in recent years. However, how to improve stiffness of CSIPs remains unsolved. The poor stiffness is one of the biggest obstacles for the application of CSIPs in the load-bearing members of civil engineering. In this study, the layout of glass–polypropylene (PP) laminate layers is designed to enhance its stiffness, and this study applies CSIPs as load-bearing members of civil engineering for the first time. Thus, the bend model of CSIP thin-wall box-beams under uniform loading is built, based on Timochenko’s theory. The deflection curve equation is presented, considering shearing deformation. The expressions for the bending of normal strain flanges of the beam and the equation considering principal shearing strain at the beam’s web are obtained, respectively. Finally, mechanical properties of the thin-wall box-beam under uniformly distributed loads were performed by FE. FE results are entirely consistent with the theoretical results, thereby making the theoretical method applicable for the design of thin-wall box-beams, which are made of composite materials. Different from other beams, the shearing deformation is a critical factor that influences the deformation of thin-walled box-beams.

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“…In addition to strengthening of existing structures, Fe-SMAs can as well be used to design and fabricate innovative post-tensioned structural elements with enhanced structural behaviour. Examples for such elements are post-tensioned glass beams as those investigated in [5] and [6]. For designing such structural solutions, finite element simulations are often conducted to predict the behaviour of the strengthened or post-tensioned elements.…”

Section: Introductionmentioning

confidence: 99%

On predicting the behaviour of an iron‐based shape memory alloy with the Ramberg‐Osgood model

Silvestru,

Deng,

Taras

2023

ce papers

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Iron‐based shape memory alloys (Fe‐SMAs) exhibit the particular characteristic of remembering their initial shape after a phase transformation from austenitic to martensitic. This property, along with the high strength and ductility, recommends such materials for strengthening existing structures and designing highly efficient pre‐stressed structural elements. To achieve this, pre‐strained strips or rods made of Fe‐SMA are anchored to a parent structure in the first step. Afterwards, the activation of the Fe‐SMA is triggered through heating, and the material strives to return to its initial shape. Due to the anchoring, a tensile stress is generated in the Fe‐SMA upon cooling back to room temperature, while in the parent structure, a compressive stress field is obtained. The material behaviour of the Fe‐SMA under uniaxial loading is characterized by a rounded stress‐strain relationship without a pronounced yield point, similar to cold‐formed steels. Moreover, in many currently existing applications, the material is used both in the martensitic phase (pre‐strained form before activation) and in the austenitic phase (after activation). This contribution addressed the suitability of the two‐stage Ramberg‐Osgood model for predicting the uniaxial stress‐strain response of the Fe‐SMA. The key parameters were derived based on uniaxial tensile tests and the suitability of the proposed stressstrain curves for use in advanced finite element simulations was emphasized by simulating these tests.

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Feasibility of mechanical post-tensioning of annealed glass beams by activating externally bonded Fe-SMA reinforcement

Cited by 18 publications

References 42 publications

Prediction of prestress level in steel structures strengthened by bonded Fe‐SMA strips

Prediction of prestress level in steel structures strengthened by bonded Fe‐SMA strips

Mechanical Property Research for CSIP Thin-Wall Box-Beams

On predicting the behaviour of an iron‐based shape memory alloy with the Ramberg‐Osgood model

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