International Journal of Structural Glass and Advanced Materials Research

International Journal of Structural Glass and Advanced Materials Research

Basic info

  • Publisher: Science Publications
  • Country of publisher: united arab emirates
  • Date added to EuroPub: 2019/May/03

Subject and more

  • LCC Subject Category: Materials Science, Architecture, Engineering, Manufacturing Technology, Environmental Protection, Biomaterials, Civil Engineering
  • Publisher's keywords: Materials Science, Architecture, Engineering, Civil Engineering, Manufacturing Technology
  • Language of fulltext: english
  • Full-text formats available: PDF

Publication charges

  • Article Processing Charges (APCs): No
  • Submission charges: No
  • Waiver policy for charges? No

Editorial information

Open access & licensing

  • Type of License: CC BY
  • License terms
  • Open Access Statement: Yes
  • Year open access content began: 2017
  • Does the author retain unrestricted copyright? True
  • Does the author retain publishing rights? True

Best practice polices

  • Permanent article identifier: DOI
  • Content digitally archived in: Nopolicy
  • Deposit policy registered in: Sherpa/Romeo

This journal has '29' articles

International Journal of Structural Glass and Advanced Materials Research: A New Open Platform for Materials Science

International Journal of Structural Glass and Advanced Materials Research: A New Open Platform for Materials Science

Authors: Chiara Bedon, Mario D’Aniello, Andreas Luible and Flavio Stochino
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Abstract

The International Journal of Structural Glass and Advanced Materials Research (IJSGAMR) is a new peer-reviewed, open access journal, which covers all aspects of theoretical and practical research of materials science. The journal aims to promote international exchange of knowledge and broad discussion on advancements, outcomes and recent developments in materials research for engineering applications. In the last years, the development of new materials and relevant technologies (i.e., industrial processes as well as constructional requirements) has been an ongoing challenge for researchers and engineers to answer to current societal demands: Energy savings, urban resilience and smart cities. In particular, buildings and civil infrastructures are very complex systems, in which single components are strongly linked to each other and their own actual performance/value (including structural, architectural, thermal aspects, etc) is actually affected by reciprocal interactions of single parts belonging to a complex assembly. In this view, buildings can represent both energy consumers and sources (thanks to solar cells or other renewable energies), while the infrastructures provide connections and information to this system. Nevertheless, given that both economical and environmental resources are limited and should be preserved, sustainable and resilient design solutions are unavoidable as well as necessary. It is clear that the knowledge of the mechanical and durability features of constructional materials, as well as the related technologies, should be enhanced in order to allow the designers to control and effectively conceive the structural behavior, but even the infrastructure owners to plan the maintenance scenarios throughout the entire life cycle considering the potential impacts on the environment. Novel studies on recycled concrete have shown, for example, that the latter can be designed and produced reducing the environment pollution, without affecting its usual structural performances. On the other hand, nowadays metallurgical technology is developing even more challenging metal alloys reducing the emission of equivalent CO2 and minimizing the energy consumptions.

Keywords: ....
Cracking of Reinforced Recycled Concrete Slabs

Cracking of Reinforced Recycled Concrete Slabs

Authors: Flavio Stochino, Luisa Pani, Lorena Francesconi and Fausto Mistretta
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Abstract

The results of an experimental investigation on cracking of fifteen reinforced recycled concrete slabs are presented in this paper. Five different recycled aggregates replacement percentages have been used for different mix design. First, the values of tensile strength, cylindrical compressive strength and modulus of elasticity of the concrete mixes have been determined. Then the deflection-load curve of the simply supported slabs have been obtained. The limit of the linear part of this curve determines the experimental cracking load. Its comparison with the theoretical value shows good agreement. Recycled concrete slabs show a similar performance to those made with ordinary concrete.

Keywords: Reinforced Recycled Concrete Slabs
Influence of Acid Frosting on the Microstructure Characteristics and Mechanical Strength of Eroded Soda-Lime-Silica Glasses by Sandstorm

Influence of Acid Frosting on the Microstructure Characteristics and Mechanical Strength of Eroded Soda-Lime-Silica Glasses by Sandstorm

Authors: Akinwumi Gbenga Owoyemi, Grace Olufunke Matthew and Seun Samuel Owoeye
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Abstract

Most glass products such as cars windshields, solar panels protecting glass and windowpanes are exposed to unavoidable sandblasting effects especially in areas prone to sandstorms. This sand impingement results into micro cracks and surface flaws which altered the structure and strength of the exposed glasses thereby lowering their service life. In this regard, attempt was made in this research to investigate the influence of acid frosting technique as a means of surface modification on the microstructure characteristics and mechanical strength of eroded soda-lime-silica glass. Several glass samples measuring 80x60 mm were initially prepared and exposed to sand impingement from a sandblasting machine with an air flow speed of 15m/s and an impact angle of 90°. The sandblasted glass samples (Scontrol) were later immersed in Hydrofluoric Acid (HF) for acid frosting procedure at dipping period of 5, 10, 15 and 20 minutes respectively. Microstructure characteristics were examined using scanning electron microscopy while flexural strength test was conducted to assess the mechanical strength of the sample glasses. The results showed that mechanical strength of the etched-sandblasted samples (S+E series) improve significantly as the dipping period increases compared with sandblasted glasses. In term of microstructure, homogenously distributed micro-cracks and numerous flaws were observed on the eroded glass samples while for the S+E series, the stress riser effect of these micro-cracks are well eliminated which accounts for the strength improvement.

Keywords: Glass, Sandblasting, HF Etching, Microstructure, Micro-Cracks
ESR and FT-IR Studies on GeO2 Substituted Lead Vanadate Semiconducting Glass System

ESR and FT-IR Studies on GeO2 Substituted Lead Vanadate Semiconducting Glass System

Authors: P. Tejeswara Rao
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Abstract

A series of Germania-lead-vanadium pentoxide glasses with x=5, 10 and 15 mol% were prepared by melt quenching technique and they were characterized by X-ray diffraction (XRD), Differential scanning calorimetry (DSC), Fourier Transform Infrared (FT-IR) and Electron Spin Resonance(ESR) techniques. X-ray diffraction results reveal that all samples are perfect amorphous in nature. Differential scanning calorimetry results indicate that the substituent GeO2 is replacing PbO in the glass network in such a way that the eutectic composition is maintained. The Fourier Transform Infrared spectra characterized V=O stretching frequency around 968 cm−1 upto 15 mole% and interestingly the Electron Spin Resonance studies did not yield well resolved hyperfine structure due to exchange broadening which varyies with nature of dopant. The Hruby parameter (Kg) for this glass system has been evaluated and reported.

Keywords: XRD, DSC, FT-IR, ESR, Semiconducting Glasses
New Golden Red Sodium Calcium Silicate Glasses

New Golden Red Sodium Calcium Silicate Glasses

Authors: Wang Cheng-Yu, Wun Nuan-Xin, Ge Yi, Tang Hua-Juan and Wang Paul W
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Abstract

Traditional golden red glasses were based on K2O-PbO-SiO2 composition system. In this paper, we reported new golden red glasses based on Na2O-CaO-SiO2 system without SnO2 and PbO in them. By using a spectrophotometer and chromamter color difference meter, it was found that the new glasses had similar optical properties to the traditional ones. The diameter of the gold particles in new glasses is around 40 nm determined by scanning electron microscope. The surface plasmon resonance created by the absorption of visible light emits golden red color. The benefits of using new golden red sodium calcium silicate glasses are the reductions of gold amount, cost and lead pollution to the environment.

Keywords: Golden Red Sodium, Calcium Silicate Glasses
Examination of Laminated Glass with Stiff Interlayers – Numerical and Experimental Research

Examination of Laminated Glass with Stiff Interlayers – Numerical and Experimental Research

Authors: Julian Hänig, Paulina Bukieda, Michael Engelmann, Ingo Stelzer and Bernhard Weller
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Abstract

Glass is a linear-elastic and isotropic building material which allows for a quick calculation of internal forces and stress in the design stage. However, in safety applications, e.g. overhead glazing or balustrades, it is made into laminated glass using plastic interlayers. Their material properties change over time and are temperature-dependent. Additionally, larger spans and the demand to reduce the amount of material used to a minimum result in significant slenderness and a considerable impact of geometric non-linearity. Consequently, the manufacturing of laminated glass products results in the requirement of complex design strategies to generate top performance. The paper introduces current design methods for laminated glass focusing on the potential use of shear action and covering load assumptions, including the effects of time and temperature. It includes a study on potential material models for three different interlayers. This led to a refined numerical model for load combinations considering shear action. For validation, vertical laminated glass panels (linearly supported on four sides) were loaded. The 36 specimens comprised two sizes: one measured 800 mm by 1200 mm and the other 1450 mm by 2800 mm and layers of glass with a thickness ranging from 3 mm to 4 mm. A planar load was introduced stepwise according to a load-time correlation model. Time and deflection correlate as a function of the interlayer. The idea was to quantify the performance of standard-PVB, stiff PVB and ionoplast interlayers as well as a monolithic glass pane as reference. The results show good agreement in comparison with the refined numerical calculations. Therefore, the load-bearing behaviour of laminated glass can be realistically modelled and allows for an economic glass design. Additionally, the numerical model was applied in an extended parametric study on the possible reduction of self-weight by using a combination of thin glass panes and stiff interlayers in insulated glass units. A resulting “butterfly chart” shows the potential of self-weight reduction as a broader summary.

Keywords: Examination of Laminated Glass
Transformable Curved Thin Glass Greenhouse

Transformable Curved Thin Glass Greenhouse

Authors: Laura Galuppi
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Abstract

The use of new generation thin, lightweight and damage-resistant glass, originally conceived for electronic displays, is being very recently proposed for structural applications, in particular for adaptive and movable skins and façades. This paper explores this concept and presents a study on the structural use of thin glass in greenhouses for protected agriculture, based on the use of cold-twisted elements and on the exploitation of their buckling phenomena. This innovative kind of greenhouse is obtained by means of mechanisms typical of transformable architecture, as the modification of the curvature of the panels, allowing the "opening/closing" of the structure roof. The kinetics of the structure will allow to modify not only the orientation and the inclination of the different surfaces forming the greenhouse, but also size and shape of the openings. Numerical analyses and “design-by-prototyping" strategy, entailing the construction of a reduced-scale mock-up of the greenhouse, have demonstrated the feasibility of this concept.

Keywords: Transformable Curved, Glass Greenhouse
Vulnerability and Protection of Glass Windows and Facades under Blast: Experiments, Methods and Current Trends

Vulnerability and Protection of Glass Windows and Facades under Blast: Experiments, Methods and Current Trends

Authors: Xihong Zhang and Chiara Bedon
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Abstract

Glass has been overwhelmingly used for windows and facades for modern constructions. Nevertheless, due to its relatively low tensile strength and mostly brittle behaviour, compared to other structural members, glass windows/facades are one of the most fragile components for a building envelop that are always associated with vast casualties in a blast incident. Several researches have been carried out to study the performance of glass windows and facades under blast loading, which include laboratory investigations on glass dynamic properties; analytical solutions for the analysis of the response of monolithic and laminated glass panes under shock; numerical modelling of window vulnerability to air blast waves; laboratory or field blast tests to validate the prediction and performance of glass windows and assemblies, as well as the efficiency of possible mitigation and retrofitting solutions for novel or existing glass claddings. This paper presents a review on the state of art of analysis and design of glass window/facade system under blast loading, with evidence of available experimental outcomes, design methods and trends, open challenges.

Keywords: Vulnerability and Protection
Theoretical Analysis and Technical Seismicity Effect Assessment onto the Production Factory due to Traffic in Prešov City

Theoretical Analysis and Technical Seismicity Effect Assessment onto the Production Factory due to Traffic in Prešov City

Authors: Daniel Papán, Katarína Krkošková and Zuzana Papánová
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Abstract

The technical seismicity effect assessment caused by traffic is the aim of article. The highway structure, as the mine of vibration, includes common layers and also special materials with dumping properties. It is the geomesh reducing the crack creation caused by fatigue, the tension strength increase and excess settlement The stress concentration in the bitumen structure reduces and separates into reinforcement. the machines sensible to vibration will be located in the production factory and it means the vibration level estimation caused by future mine of vibration is needed. The dynamic bedrock diagnostics was needed to provide for prognosis numerical model of dynamic effect ground half-space and dynamic effect future highway in the location of Prešov-Haniska and the dynamic interaction of this mechanism (the ground – pavement base structure). The dynamic diagnostics of bedrock main aim was determination of base dynamic parameters due to wave method coming out from surface wave stress spreading analysis in the real area and frequency characteristics of this bedrock area, frequency progression characteristics. The series of Impulse Seismic Method (ISM) measuring was done for named dynamic parameters determination in this bedrock that was modelled also with determined bedrock dynamic parameters in Visual FEA software, whereby the investigating area was separated into the parts according to the geological profile. The FEM model was created as a circle part plane. Dynamic load was applied as kinematic exciting as point vibration velocity and point vibration acceleration in the middle of the model surface. Measured pavement vibration values induced by the vehicle crossing on highways were the outputs. The distances which the mine vibration cross into and the standard limits that mustn’t be over crossed during the production factory Spinea construction and its operation process are the results.

Keywords: Theoretical Analysis, Technical Seismicity
Studies on Environmental Impact Assessment of Reinforced Concrete in Different Life Cycle Phases

Studies on Environmental Impact Assessment of Reinforced Concrete in Different Life Cycle Phases

Authors: Jair Frederico Santoro and Moacir Kripka
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Abstract

Concrete is one of most used materials in construction and also one of the main responsible for the emission of carbon dioxide, or CO2, in the atmosphere. Thus, in order to study ways to reduce this impact, it is important to evaluate the influence of each raw material of the reinforced concrete, as well as the phases of the life cycle in which these impacts are more relevant. This paper presents a review of recent studies related to carbon dioxide emissions of the materials of reinforced concrete. In this review, we sought to identify the phases of the life cycle of reinforced concrete most focused by researches. It was found that the cement production stage is the most contemplated in the studies, many of them focusing on the additions of complementary cementitious products, since cement is among the materials that contributes decisively to the total CO2 emissions. The structure sizing, with the definition of concrete strength to be adopted in the design, were also extensively investigated, since these are phases in which it is identified a greater possibility of contribution, by the researchers, for the minimization of the impacts.

Keywords: Studies on Environmental
https://thescipub.com/pdf/10.3844/sgamrsp.2018.1.14

https://thescipub.com/pdf/10.3844/sgamrsp.2018.1.14

Authors: Farhad Akhoundi, Graça Vasconcelos and Paulo Lourenço
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Abstract

Masonry has a widespread use in the construction of the buildings even in reinforced concrete or steel frames. Past earthquakes have demonstrated the vulnerability of masonry infills resulted in the human life losses and economic costs. Recently innovative strengthening techniques such as Textile Reinforced Mortar technique (TRM) is used for enhancing the seismic response of the infills. Different procedures were suggested to enhance the bond between rendering mortar of the TRM technique and infilled frame to prevent its detachment. In this study commercial glass fiber shear connectors were used for connecting the TRM layer to the infilled frame and their response were investigated by testing the samples in the in-plane direction. The quasi static in-plane test was performed cyclically on two specimens; one without strengthening layer and another strengthened with commercial textile meshes. The results showed that TRM technique enhances the in-plane response of the infilled frames but the effectiveness of the shear connectors could be improved using proper materials.

Keywords: Plane Behavior, Textile Reinforced Mortar
HYGLASS: Design Proposal for an Integrated Multifunctional Hybrid Glass-Steel Structure

HYGLASS: Design Proposal for an Integrated Multifunctional Hybrid Glass-Steel Structure

Authors: Maurizio Froli and Francesco Laccone
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Abstract

Contemporary cities demand smart communication infrastructures to facilitate the interaction of residents and visitors with the urban environment. Such systems are required to be network-connected, interactive, environmental-sensitive and energetically self-sustaining. Moreover, in outdoor applications they should mark an urban focal point and should be able to satisfy additional public requirements like illumination, transmission of information etc. In the framework of a research program on post-tensioned glass-steel structures, the HYbrid GLAss-Steel Stele (HYGLASS) has been conceived to work, beyond its structural function, as interactive signage, digital totem or wayfinding and, gradually scaling its size, as smart landmark tower. The tetrahelical bearing structure is made of laminated glass panels, which collaborate with a filigree steel truss and embed in their interlayers miniaturized Information and Communications Technology, photovoltaic and lighting devices.

Keywords: HYGLASS, Design Proposal
Knowledge Acquisition of Existing Buildings by Means of Diagnostic Surveying. Case Studies

Knowledge Acquisition of Existing Buildings by Means of Diagnostic Surveying. Case Studies

Authors: Giovanna Concu, Nicoletta Trulli and Monica Valdés
( 0 downloads)
Abstract

The issue of assessing the structural safety of existing buildings involves several problems when a unique and reliable strategy of modelling and analyzing is looked for. This is mainly related to the peculiarity of each construction in a context of broad variety. In this light the structural model and consequently the judgment on structural safety should be derived from a process of knowledge of the construction carried through steps of different reliability. This paper focuses on a fundamental step of the knowledge acquisition process, which is the surveying campaign aimed at assessing some of the parameters to implement into the structural model (geometry, detailing and properties of the materials). The main aspects of a proper and effective planning of the diagnostic campaign are issued and discussed also with reference to some case studies. Special emphasis is given to the usefulness of non-destructive testing methods, the criteria underlying their selection and the relevance of their calibration.

Keywords: Knowledge Acquisition
Nonlinear Analysis of RC Box Culverts Resting on a Linear Elastic Soil

Nonlinear Analysis of RC Box Culverts Resting on a Linear Elastic Soil

Authors: Daniele Baraldi, Fabio Minghini, Enrico Tezzon and Nerio Tullini
( 0 downloads)
Abstract

In the analyses presented, the soil-structure interaction is accounted for by means of a FE-BIE approach, in which the structure is modelled with displacement-based beam finite elements, whereas the boundary between structure and substrate is described in terms of surface tractions by means of a boundary integral equation incorporating a suitable Green's function. This mixed formulation ensures full continuity between structure and substrate in terms of displacements and rotations. To take account of structural nonlinearities, potential plastic hinges are defined at the end sections of the beam elements in the form of semi-rigid connections characterized by a rigid-plastic moment-rotation relationship. The incremental analyses carried out emphasize the effectiveness of the model in reproducing collapse mechanisms and stiffness loss of the structure for increasing loads. Moreover, the adopted formulation is able to capture both interfacial shear tractions and vertical normal tractions which develop along the substrate boundary under a variety of loading conditions.

Keywords: Nonlinear Analysis
Infrared Thermography for the Characterization of Painted Vaults of Historic Masonry Buildings

Infrared Thermography for the Characterization of Painted Vaults of Historic Masonry Buildings

Authors: Claudia Casapulla, Alessandra Maione and Luca Umberto Argiento
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Abstract

The infrared thermography is a type of non-destructive investigation which can find interesting application in acquiring information about the structural features of ancient masonry buildings. In this case, in fact, the needs of preservation of the historical values have to be compound with the needs of achieving a proper level of knowledge of the parameters influencing the structural behaviour in order to perform a reliable evaluation of their seismic safety. A recent application of the infrared thermography was proposed in the framework of the Project on the seismic evaluation of the Museum of Capodimonte in Naples (Italy). The objective was to clarify if the painted vaults covering some rooms could have structural function and to identify their constructive typology. In this circumstance, an interesting methodological approach, with more general validity, has been developed by integrating the instrumental investigations with different sources of information, such as historical documents and hypotheses of critical interpretation.

Keywords: Infrared Thermography

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