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A special issue of Materials (ISSN 1996-1944). This special issue belongs to the section "Construction and Building Materials".

Deadline for manuscript submissions: closed (31 July 2021) | Viewed by 14444

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Prof. Dr. Massimo Latour

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Department of Civil Engineering / DICIV, University of Salerno, 84084 Fisciano, SA, Italy
Interests: seismic design; innovative materials; metal structures; advanced design; FE tools
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Special Issue Information

Dear Colleagues,

The capacity to use novel materials or the possibility to apply traditional construction materials in new forms is becoming a factor strongly influencing the capacity of advanced countries to develop new types of civil engineering structures and infrastructures. From this point of view, research on traditional construction materials today requires the application of refined and advanced design tools to update our knowledge, suggesting new forms of implementing traditional materials in new ways. On the other hand, the development of basic design tools for new materials is still needed in the fields where the research of novel engineering materials is at its first steps.

This Special Issue in Materials aims to report critical findings, advances, and applications in all structural engineering fields and, most of all, cutting-edge methodologies applied to innovative structural typologies or the advances on innovative materials applied in structures and infrastructures.

We solicit contributions covering a wide range of topics, including innovative materials, new experimental methodologies, new design tools, seismic behavior of traditional structures designed with innovative methodologies, retrofit of existing buildings with traditional and innovative materials, guidelines for the design of new structural details, and FEM studies of components.

Prof. Dr. Massimo Latour
Guest Editor

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Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Materials is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

Structures
Innovative materials
Traditional materials
Existing buildings
Seismic engineering
Retrofit
Numerical methods
FEM
Structural components

Published Papers (5 papers)

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Research

12 pages, 3957 KiB

Open AccessArticle

Numerical Modelling of CFS Three-Story Strap-Braced Building under Shaking-Table Excitations

by Alessia Campiche

Materials 2021, 14(1), 118; https://doi.org/10.3390/ma14010118 - 29 Dec 2020

Cited by 13 | Viewed by 1801

Abstract

In recent research activities, shake-table tests were revealed to be useful to investigate the seismic behavior of cold-formed steel (CFS) buildings. However, testing full-scale buildings or reduced-scale prototypes is not always possible; indeed, predicting tools and numerical models could help designers to evaluate earthquake response. For this reason, numerical modelling of two strap-braced prototype buildings, recently tested on shake-table at University of Naples Federico II in cooperation with Lamieredil S.p.A. company, was developed. The models were validated trough the comparison between experimental and numerical results, in term of dynamic properties (fundamental period of vibration and modal shapes), peak roof drift ratios and peak inter-story drift ratios. Although dynamic properties of mock-ups were captured with accuracy by the developed models, the comparison highlighted the need to consider accumulation of damage and rocking phenomenon in the modelling to capture with good accuracy the seismic behavior of CFS strap-braced building, subjected to high intensity records. Full article

(This article belongs to the Special Issue Conventional vs. Innovative Materials, Tradition and Innovation)

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14 pages, 4134 KiB

Open AccessArticle

The Performance of Preloaded Bolts in Seismically Prequalified Steel Joints in a Fire Scenario

by Roberto Tartaglia, Mario D’Aniello, Marco Andreini and Saverio La Mendola

Materials 2020, 13(22), 5079; https://doi.org/10.3390/ma13225079 - 11 Nov 2020

Cited by 22 | Viewed by 1643

Abstract

Seismically pre-qualified beam-to-column joints guarantee large ductility in seismic scenarios thanks to the effectiveness of the design rules and technological requirements that are devoted to avoiding the failure of brittle components (i.e., bolts and welds). However, their performance under different severe actions like those induced by fire has not been properly investigated. Therefore, a parametric study based on finite element simulations has been carried out with the aim to verify the effectiveness of local details of seismically prequalified joints under fire. Finite element analyses were carried out on beam-to-column assemblies sub-structured from a reference archetype building accounting for both material and geometrical imperfections. The bolts’ internal actions were monitored in all the investigated specimens varying the applied vertical loads. The results show that the seismic design rules adopted to size the bolts are effective to resist the large increase in shear forces in the bolts occurring under fire. Thus, the investigated joints provide satisfactory ductility and rotation capacity at high temperature preventing the failure of bolts; further analysis could be conducted to investigated the fire performance of the investigated joints in a seismic scenario. Full article

(This article belongs to the Special Issue Conventional vs. Innovative Materials, Tradition and Innovation)

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17 pages, 7962 KiB

Open AccessArticle

Numerical Simulations to Predict the Seismic Performance of a 2-Story Steel Moment-Resisting Frame

by Roberto Tartaglia, Mario D’Aniello and Raffaele Landolfo

Materials 2020, 13(21), 4831; https://doi.org/10.3390/ma13214831 - 28 Oct 2020

Cited by 36 | Viewed by 2898

Abstract

The seismic response of steel moment resisting frames (MRFs) is influenced by the behavior of joints. Within the ongoing research project “FUTURE”(Full-scale experimental validation of steel moment frame with EU qualified joints and energy efficient claddings under Near fault seismic scenarios), shake table tests will be carried out on a two-story one bay MRF equipped with different types of prequalified beam-to-column joints. In order to design the experimental campaign, preliminary numerical simulations have been carried out to predict the seismic performance of the experimental mock-up in terms of distribution of damage, transient and residual interstory drifts. In this paper the main modeling assumptions and the results of the seismic analyses are shown and discussed. In particular, the response of joints was systematically investigated by refined finite element (FE) simulations and their behavior was taken into account in the global structural performance by means of both concentrated plastic hinge and distributed plasticity models. Both static and dynamic non-linear analyses show in which terms the type of models for plastic hinges influences the results. The modeling approach plays a key role only at very high seismic intensity where large ductility demand is imposed. In addition, changing the type of joints has less influence on the overall response of the frame. Full article

(This article belongs to the Special Issue Conventional vs. Innovative Materials, Tradition and Innovation)

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22 pages, 12513 KiB

Open AccessArticle

Seismic Behavior of Steel Column Base with Slip-Friction Connections

by Chengyu Li, Qi Liu and Gongwen Li

Materials 2020, 13(18), 3986; https://doi.org/10.3390/ma13183986 - 9 Sep 2020

Cited by 4 | Viewed by 2184

Abstract

Traditional rigid column base connections are damaged to different degrees after an earthquake and the damage is generally nonrecoverable. Thus, the cost of repairing or dismantling is quite high. A new type of slip-friction column base connection is proposed in this paper, which aims to replace the yielding energy dissipation of the traditional column base connection by the sliding friction energy dissipation between the arc endplates, thus achieving the design objective of damage-free energy dissipation. Finite element simulation was conducted to study the hysteretic performance of the proposed connections considering different axial compression ratios. The research indicates that both kinds of the proposed connections show good energy dissipation behavior and the increase of axial compression force can increase the energy dissipation ability. It also shows that the two kinds of connections can achieve the objective of damage-free energy dissipation. For the proposed connection, future research is still needed such as corresponding tests in the laboratory, the effect of the connection on the whole structure, and the re-centering systems for the connections. Full article

(This article belongs to the Special Issue Conventional vs. Innovative Materials, Tradition and Innovation)

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18 pages, 11677 KiB

Open AccessArticle

Stiffness Prediction of Connections between CHS Tubes and Externally Welded I-Beams: FE Analyses and Analytical Study

by Sabatino Di Benedetto, Massimo Latour and Gianvittorio Rizzano

Materials 2020, 13(13), 3030; https://doi.org/10.3390/ma13133030 - 7 Jul 2020

Cited by 7 | Viewed by 5144

Abstract

Double-tee profiles are the most popular members in Europe and the USA for steel structures. However, more efficient cross-sections, such as circular hollow sections (CHSs), could be adopted, since they can provide higher aesthetic, economic and mechanical benefits, with the only drawback of more complex connections such as in the case of I-beams welded to the external surface of circular hollow profiles. Based on the ring model theory, developed by Togo, a rule to design the flexural resistance of such a connection has been included in the Eurocode 3 part 1.8, while no formulations are provided to predict the corresponding initial stiffness. The present work aims at filling this knowledge gap, adopting an approach based on experimental, numerical and analytical work. A monotonic and a cyclic test have been performed on two beam-to-column sub-assemblies; the experimental outcomes have been exploited to validate a finite element (FE) model developed in Abaqus and used to numerically perform the monotonic loading simulations of 30 joints. Afterwards, starting from the extracted information about stiffness, a regression analysis was carried out to define the coefficient of a design equation analytically derived applying the component method approach. The regression analysis is characterized by a coefficient of variation equal to 0.19. Full article

(This article belongs to the Special Issue Conventional vs. Innovative Materials, Tradition and Innovation)

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