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

From Plastic Waste to Building Material: Mechanical Properties of Recycled Thermoplastic Timber

From Plastic Waste to Building Material: Mechanical Properties of Recycled Thermoplastic Timber

Authors: Monica Valdés, Nicoletta Trulli and Barbara De Nicolo
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Abstract

The present paper illustrates the mechanical properties of a new structural product called Recycled Thermoplastic Timber (RTT), manufactured in Sardinia (Italy) and made of recycled plastics. The preliminary results of an experimental campaign aimed at assessing the main mechanical and physical properties of RTT are presented and discussed. Unreinforced and steel-reinforced thermoplastic timber profiles have been tested in laboratory and some mechanical and physical properties have been evaluated also varying the climatic conditions. Furthermore, weathering properties have been checked by testing the resistance to freezing and thawing. In light of the results since now achieved the prospect of using RTT as an eco-friendly alternative to wood and other building materials is discussed.

Keywords: Plastic Waste
Construction Stage Analysis for a New Mixed Structure Building in Milan

Construction Stage Analysis for a New Mixed Structure Building in Milan

Authors: Marco Zucca, Nicola Longarini, Federico de Socio and Iacopo Migliori
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Abstract

In this study the Construction Stage Analysis (CSA) of a new mixed structure building is discussed in order to identify the best timing and execution activities scheduling. The building is part of a new university campus that will be realized close to the center of the city. The CSA is carried out by the implementation of two models: the finite element model for the structural analyses and the BIM model for controlling the sequence of the construction phases. Once fixed the structural model, in the preliminary design phase, different sequences are analyzed in order to optimize the construction management in terms of timing and costs. Moreover, the optimization of the construction phases is set by considering the creep and shrinkage of the concrete material.

Keywords: Construction Stage Analysis
A Didactic Laboratory of Theory and Design of Structures for Bachelor Civil Engineering Students in Cagliari

A Didactic Laboratory of Theory and Design of Structures for Bachelor Civil Engineering Students in Cagliari

Authors: Mariangela Deligia, Fabrizio Pittau, Silvia Corda, Michele Serra and Mauro Sassu
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Abstract

The course of Theory and Design of Structures for the Bachelor courses of Civil Engineering in Academic Year 2016-17 at the University of Cagliari was divided in two semesters: the first one dealing with theoretical aspects, in the second one a didactic laboratory was developed with the aim of a structural design of a building. The assignment and development of a series of individual themes of structural design was managed in a classroom of about 120 students. The strategy to optimize the efficiency was to assign a series of simple plane framed structures with comparable difficulty. They were generated from a common building with six identical frames, each composed by four columns and three floors. The removal of beams or columns, together with variations of length, height, location and destination, generated the requested individual themes. The students were then divided into four groups, followed by tutors. They experienced the development of the project in classroom, in a series of twelve sessions: Eight of them were dedicated to develop a prescribed step of the project, two for the inspection activities and the remaining two for harmonizing the project's state of progress of the project. The main educational results are here illustrated.

Keywords: Didactic Laboratory
Cyclic Instability of Shape-Memory Alloys in Seismic Isolation Systems

Cyclic Instability of Shape-Memory Alloys in Seismic Isolation Systems

Authors: Filipe Amarante dos Santos, Corneliu Cismasiu and Francisco Braz Fernandes
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Abstract

Shape-memory alloys are being progressively introduced as kernel components in seismic retrofitting devices for civil engineering structures. In order to control the instability associated with the first mechanical cycles, a training procedure is usually implemented, which stabilizes the superelastic behavior of the alloy. This paper addresses the characterization of the cyclic behavior of an austenitic NiTi alloy with emphasis on the definition of the instability functions associated with the cumulative residual strain and the variation of the critical stress needed to induce martensite. A wide set of experimental tensile tests are performed to study the influence of strain-rate and ambient temperature on the material coefficients controlling the described functions. A numerical model for shape-memory alloys is presented, which is able to simulate the instability phenomena associated with superelastic cycling in NiTi wires. It is shown that prior stabilization by initial training may not be advantageous, since it is during the first cycles that the alloy shows greater energy dissipation capabilities.

Keywords: Cyclic Instability, Shape-Memory Alloys
About Glassy Amorphous Metal Injection

About Glassy Amorphous Metal Injection

Authors: Raffaella Aversa, Relly Victoria Petrescu, Antonio Apicella, Samuel Kozaitis, MirMilad Mirsayar, Taher Abu-Lebdeh, Bilal Akash and Florian Ion Tiberiu...
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Abstract

The paper aims to present studies on the melt flow, melting and rheology of melting in a super-cooled metastable liquid metal, which is injection molded, of the Zr44-Ti11-Cu10-Ni10-Be25 alloy, which can induce selective crystallization. In this process, high Be-velocities were observed, Cu and Ni atoms that crystallized differently in superficial bulk metallic bulk liquids. It wants to highlight and analyze the result of the morphological behavior of microscopic observation regarding Glass Bulk Metallic (BMG) with the composition of a commercial liquid metal alloy (LM001B). One specifies that the injection molded plate was supplied to us by Liquid Metals Technologies Inc., Ca, USA and was manufactured using an Engel injection molding machine operating at 1050-1100°C. The sample that was observed was then cut with a jet of water. FEI Scios Dual-Beam performed microscopic observation. In a cross-section, the presence of crystalline phases can be observed on short-range command. It is also investigated the presence of short-range command groups, their distribution and the effect they can have on the behaviors and properties of alloys. We can now talk about a new material revolution by putting in bulk metallic glasses, Inside Bulk Metallic, (BMGs). It's about metals that are very different from each other, but they can still be combined with the help of intense heat and melted together to produce a beautifully colored and hot liquid. When this liquid is cooled very quickly (fast enough), the metal atoms manage to retain the liquid in a totally random manner, thus forming an amorphous alloy. Glasses made of this amorphous material are very scratch-resistant, BMG material being a plastic, amorphous, but also elastic, but very resistant. You can even speak one of the most powerful materials known today! The weight ratio of BMG can usually be twice as high as that of titanium, magnesium or aluminum. The hardness of the BMG type material is typically a Vickers hardness of more than 500, which is about twice the hardness of most quality stainless steels and titanium and at least four times the hardness of the aluminum and magnesium. BMGs can be three times more elastic or more resistant than virtually all known crystal metal alloys. Some BMGs are highly corrosion-resistant, with alloys containing elements such as beryllium or niobium that tend to be very corrosive. In general, erosion resistance is remarkable in all these BMGs.

Keywords: Glassy Amorphous Metal Injection
Effect of Novel Thermo-Chemical Treatment on Bending Strength of Laminated Glass

Effect of Novel Thermo-Chemical Treatment on Bending Strength of Laminated Glass

Authors: Ajitanshu Vedrtnam
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Abstract

The science of thermal and chemical treatment of glass is well documented. The Laminated Glass (LG) is usually not treated as either treated glass is used during production or lower melting temperature of interlayer does not allow the treatment. The present work reports the novel methods of thermo-chemical treatment of LG having annealed soda lime glass plies. Five thermo-chemical treatments were performed on LG using different salts (Potassium Nitrate Carbohydrazide, Lithium Nitride), via clay coating (saturated with salts), using fused silica wafer coated with a thin graphene layer and utilizing the microwave heating. The bending strength is measured before and after thermo-chemical treatment using Q-set coupled bending tester (following the ASTM D790-03). The linear elastic model is utilized for obtaining normal stress and deformation at fracture load using ANSYS 14.5. The bending strength of thermo-chemical treated LG sample was found significantly higher than untreated LG in the most cases. The fracture pattern of the treated LG was also modified compared to the untreated LG as impurities and defects were reduced during treatment. The mechanics of increased bending strength and modified fracture is also discussed with reference to the effects of thermo-chemical treatment of LG, however, the need of a specialized numerical method that can effectively model the implications of treatment on LG and multiple fractures experienced by the LG during testing are suggested as future work.

Keywords: Novel Thermo-Chemical Treatment
Comparison of Analytical and Numerical Results for the Charring Rate of the Timber-Concrete Beam

Comparison of Analytical and Numerical Results for the Charring Rate of the Timber-Concrete Beam

Authors: Zuzana Kamenická, Jaroslav Sandanus, Lukáš Blesák, Kamila Cábová and František Wald
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Abstract

Modelling the thermal response of timber is a primary issue for the assessment of the mechanical resistance of timber structures exposed to fire. Therefore, this paper analyses various advanced calculation methods of determining the charring rate. Authors of this contribution use analytical calculation methods according to two different publications and also a numerical calculation by means of program based on Finite Element Method (FEM). Input values of parameters in these calculations were derived from an experiment on a timber-concrete beam, which was realised by two authors of this paper in the past. In conclusion, the values of one-dimensional charring rate of timber calculated by different methods are compared. It is necessary to pay attention to the fact that the resultant values can significantly differ depending on various input values in the analytical calculations. The charring rate increases until a certain time at the beginning of the charring and then it starts to slightly decrease. However, not all of the calculation methods presented in this paper correspond with that.

Keywords: Analytical and Numerical Results
Key Structural Aspects for Adaptive Facades - Activity Progress from the EU-COST Action TU1403 ‘Structural’ Task Group

Key Structural Aspects for Adaptive Facades - Activity Progress from the EU-COST Action TU1403 ‘Structural’ Task Group

Authors: hiara Bedon, Dániel Honfi, Marcin Kozłowski, Klára Vokáč Machalická, Filipe Santos, Thomas Wüest, Martina Eliášová and Miroslav Vokáč
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Abstract

Adaptive facades are getting more and more widespread in modern buildings. These facade systems, among many others, need to fulfil the requirements of several structural considerations, such as structural safety, serviceability, durability, robustness and fire safety, being typically defined for standard facades and building enclosures in general. The current paper discusses special structural characteristics which need to be taken into account when designing adaptive facades and summarizes some recent efforts of the activities in progress carried out by the ‘Structural’ Task Group (TG2.4) of the European COST Action TU1403 ‘Adaptive Facades Network’.

Keywords: Key Structural Aspects
Special Issue on Current Challenges in Materials Design

Special Issue on Current Challenges in Materials Design

Authors: Chiara Bedon, Fausto Mistretta, Mauro Sassu and Flavio Stochino
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Abstract

This special issue of the International Journal of Structural Glass and Advanced Materials Research contains new contributions and the extended version of some selected papers presented in the 6th International Workshop on Design in Civil and Environmental Engineering (DCEE2017) held at the University of Cagliari during November 9 - 10 - 11, 2017. Previous conferences of this series have been successfully held in Rome (2016), Taiwan (2015), Lyngby (2014), Worcester (2013), Dajeon (2011). DCEE2017 continued the primary objective of exploring what design means within Civil and Environmental Engineering and discussing interdisciplinary design in co-operation with Architecture, Urban Planning, Topography and more. In this way, one of the main themes of DCEE2017 was the design of new engineered materials. Hussein et al. (2018) presented an innovative technique based on photo-acoustic to prepare Porous Silicon p-type. Zhang and Bedon (2018) reported on the use of structural glass for windows and facades under blast loads. Valdes et al. (2018) analysed the opportunity to recycle plastic elements transforming in a new construction component. Furthermore, interdisciplinary challenges in engineering design was another key topic of the conference. In this special issue we collected several interesting contributions on this theme. Froli and Laccone (2018) discussed an innovative application of integrated multifunctional hybrid glass-steel structure. Akhoundi et al. (2018) analysed the use of glass fiber shear connectors in Textile Reinforced Mortar (TRM). This technique can be useful to reduce the vulnerability of masonry infills to seismic actions. Zucca et al. (2018) discussed the structural design of an important complex building in Milan. Baraldi et al. (2018) presented a significant numerical approach for non linear problems of soil-structure interaction. Many presentations of DCEE2017 were focused on the investigation of existing structure throughout non destructive methods. Concu et al. (2018) discussed the Italian standard framework reporting two interesting case studies, while Casapulla et al. (2018) analysed the effectiveness of the infrared thermography to characterize painted vaults in masonry building. Finally, another session of the conference was devoted to design education in engineering design. A precious contribution was given in Deligia et al. (2018), in which an innovative structural design workshop at the University of Cagliari for engineering bachelor students was reported. We want to thank all the DCEE2017 participants, the authors of this special issue for their profitable contributions and the reviewers who carefully read the manuscripts and contributed to the improvement of the submitted articles.

Keywords: Special Issue, Current Challenges
Reliability of Selected Critical Infrastructure Elements

Reliability of Selected Critical Infrastructure Elements

Authors: Lucia Figuli, Matúš Ivančo, Zuzana Kubíková and Zuzana Zvaková
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Abstract

The paper brings an overview of aspect of reliability of selected critical infrastructure elements. Firstly critical infrastructure elements are defined. Extreme loading of such elements and the normative standards are mentioned. The paper brings an overview about a current research connected with critical infrastructure element protection and in conclusions defines new challenges for the research in the problem.

Keywords: Selected Critical
Structural Performance of Double Laminated Glass Panels with EVA and PVB Interlayer in Four-Point Bending Tests

Structural Performance of Double Laminated Glass Panels with EVA and PVB Interlayer in Four-Point Bending Tests

Authors: Tomáš Hána, Martina Eliášová and Zdeněk Sokol
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Abstract

Many examples of glass loadbearing structures such as handrails, panes, beams and columns can be found in modern architecture. Most of these elements are made of laminated glass panels. There is a general lack of knowledge about the transfer of shear forces between the glass plies in perpendicularly-loaded laminated panels. This transfer depends significantly on the stiffness of the polymeric interlayer, which is time-dependent and temperature-dependent. There are several computational methods for the design of laminated glass that take the shear coupling of the glass plies into account, e.g. analytical methods, numerical modeling and also the draft of European code. These methods need to be verified experimentally. This paper reports on rectangular double-laminated glass panels in a shortterm displacement controlled four-point bending test with an EVA and with a PVB interlayer under a constant temperature. These tests were performed at CTU in Prague. Our experimental results show that panels with an EVA interlayer had greater bending stiffness than panels laminated with PVB and achieved higher ultimate load values. The experimental data were further compared with simplified analytical methods, such as the European draft prEN 16612 and the Enhanced Effective Thickness approach and also a numerical FEM model. Numerical and EET methods results were in good agreement with the experimental data. The way in which the specimens broke was a characteristic feature of laminated glass. The shards remained attached to the interlayer, proving that laminated glass panels can be used safely above the heads of users of the structure. Simplified methods and numerical models validated by experimental tests on perpendicularly-loaded laminated glass panels enable these structures to be designed safely and economically for practical uses.

Keywords: Structural Performance, Double Laminated
Performance of Standard Statistical Distributions for Modeling Glass Fracture

Performance of Standard Statistical Distributions for Modeling Glass Fracture

Authors: David Kinsella, Johan Lindström and Kent Persson
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Abstract

Experimental data on the strength of new annealed float glass tested in an ambient environment was collected. A comparison was made between four standard distributions, the normal, lognormal, Gumbel and Weibull, with respect to the performance in modelling the strength. The Weibull distribution outperformed the normal and lognormal distributions when the data contained edge only failure origins. When the data was selected to contain surface only failure origins it is indicated that the extreme value distributions performed poorly. The Weibull model is known to have a basis in a failure-mechanism concept based on the weakest-link principle. The Gumbel distribution can also be derived from failure-based mechanics and be associated with certain types of flaw size distribution. The Weibull model, however, is a better choice for a failure model of glass edge strength compared to the normal and lognormal distributions and at least as good as a Gumbel distribution. The surface strength is complicated to model and none of the standard distributions which were examined are capable of producing a proper model. The sample size also has a profound impact on the performance of the surface strength models.

Keywords: Standard Statistical Distributions
Preparation of Porous Silicon P-Type and Thermal Diffusivity Measurement Using Photoacoustic Technique

Preparation of Porous Silicon P-Type and Thermal Diffusivity Measurement Using Photoacoustic Technique

Authors: Mohammed Jabbar Hussein, Suaad Sahib Hindal and Amany Akram Awaad
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Abstract

Porous silicon (PSi) layers were formed on a p-type Si wafer. Electrochemical method was used to prepare 36 samples with three values of current density (10, 20 and 30) mA/cm2, each involved ( 20, 40, 60 and 80) min etching times the samples were heated to three selected temperatures of 100, 200 and 350°C in three groups. The first group covers 12 samples corresponding to 10 mA/cm2 while the other two correspond to the remaining values of current density respectively. Each annealing process for these sample groups lasted three hours in ambient air. The morphology of the layers, before and after annealing, formed by this method was investigated by Scanning Electron Microscope (SEM). Photoacoustic technique (PA) was employed carry out Thermal Diffusivity (TD) measurements. In this study, the porosity and thickness porous increased with increasing current density and etching time. While the thermal diffusivity TD increases with increasing annealing temperature.

Keywords: Preparation, Porous Silicon P-Type, Thermal Diffusivity Measurement
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

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