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Modelling
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Advances in Structure Mechanics and Finite Element Modelling
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Advances in Structure Mechanics and Finite Element Modelling

A special issue of Modelling (ISSN 2673-3951). This special issue belongs to the section "Modelling in Engineering Structures".

Deadline for manuscript submissions: closed (30 November 2021) | Viewed by 13650

Special Issue Editors

Prof. Dr. Ahmed A. Ibrahim

E-Mail Website
Guest Editor
Department of Civil and Environmental Engineering, University of Idaho, 875 Perimeter Dr. MS 1022, Moscow, ID 83844, USA
Interests: mechanistic damage modeling of reinforced concrete elements under blast loading; finite element analysis; non-linear behavior and modeling of reinforced and prestressed concrete elements
Prof. Dr. Aly Said

E-Mail Website
Guest Editor
Department of Architectural Engineering, 104 Engineering Unit A, The Pennsylvania State University, University Park, PA 16802, USA
Interests: finite element analysis; performance of hybrid reinforced and prestressed concrete structures; smart structures

Special Issue Information

Dear Colleagues,

This special issue will be covering a wide range of the latest trends in the field of structural mechanics and the finite element modeling (FEM). Coupling structural mechanics and FEM should provide reliable and economical design. This special issue focuses on topics related to structural engineering mechanics, structural integrity, probabilistic modeling, engineering design, fatigue, fracture mechanics, damage mechanics, FEM simulation of composite structures, and other related areas. We also invite you to submit articles on the use of machine learning (MI) algorithms in the integrity assessments and analyses of engineering structures. In addition, this special issue will handle topics related to structural modelling under wind, seismic and blast loads using computational fluid dynamics (CFD).  loads. The huge cost of performing full-scale experimental testing has pushed researchers to perform high-fidelity analyses using FEM and CFD. Therefore, this Special Issue will contribute to the scientific and technological advancement in the use of FEM tools for simulation and modeling of structural integrity, safety, and design of engineering structures.

Prof. Dr. Ahmed A. Ibrahim
Prof. Dr. Aly Said
Guest Editors

Manuscript Submission Information

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. Modelling is an international peer-reviewed open access quarterly 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 1000 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

  • Finite Element Analysis
  • Computational Fluid Dynamics
  • Structural Analysis
  • Mechanics
  • Modelling

Published Papers (4 papers)

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Research

12 pages, 3054 KiB  
Article
A Numerical Simulation of Electrical Resistivity of Fiber-Reinforced Composites, Part 2: Flexible Bituminous Asphalt
by Rojina Ehsani, Alireza Miri and Fariborz M. Tehrani
Modelling 2022, 3(1), 177-188; https://doi.org/10.3390/modelling3010012 - 17 Mar 2022
Cited by 1 | Viewed by 2407
Abstract
Asphalt concrete pavements are vulnerable to freeze-thaw cycles. Consecutive cracking and penetration of corrosive agents can expedite the degradation of asphalt pavements and result in weight loss and reduced strength. Fiber reinforcement in flexible bituminous asphalt bridge cracks limits the crack width and [...] Read more.
Asphalt concrete pavements are vulnerable to freeze-thaw cycles. Consecutive cracking and penetration of corrosive agents can expedite the degradation of asphalt pavements and result in weight loss and reduced strength. Fiber reinforcement in flexible bituminous asphalt bridge cracks limits the crack width and enhances the toughness of the composite. Furthermore, steel fibers facilitate asphalt heating during maintenance and repair operations. Electrical resistivity is a vital parameter to measure the efficiency of these operations and to identify the state of degradation in fiber-reinforced asphalt concrete. The significant difference between conductivities of steel fibers and bituminous matrix warrants in-depth investigations of the influence of fiber reinforcement on the measured surface electrical resistivity of placed pavements. Numerical simulations endeavor to predict the resistivity and associated deviations due to randomly distributed fiber reinforcement. Results and discussions reveal the sources and magnitudes of fiber geometry and content adjustments. Outcomes investigate associated errors for practical applications. Full article
(This article belongs to the Special Issue Advances in Structure Mechanics and Finite Element Modelling)
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13 pages, 3905 KiB  
Article
A Numerical Simulation of Electrical Resistivity of Fiber-Reinforced Composites, Part 1: Brittle Cementitious Concrete
by Alireza Miri, Rojina Ehsani and Fariborz M. Tehrani
Modelling 2022, 3(1), 164-176; https://doi.org/10.3390/modelling3010011 - 17 Mar 2022
Cited by 2 | Viewed by 2962
Abstract
The durability of concrete has a significant influence on the sustainability and resilience of various infrastructures, including buildings, bridges, roadways, dams, and other applications. Penetration of corrosive agents intensified by exposure to freeze-thaw cycles and the presence of early-age cracks is a common [...] Read more.
The durability of concrete has a significant influence on the sustainability and resilience of various infrastructures, including buildings, bridges, roadways, dams, and other applications. Penetration of corrosive agents intensified by exposure to freeze-thaw cycles and the presence of early-age cracks is a common cause of reinforced concrete degradation. Electrical resistivity is a vital physical property of cementitious composites to assess the remained service life of reinforced concrete members subjected to corrosive ions attacks. The application of steel fibers reduces the vulnerability of concrete by limiting crack propagation, but complicates field and laboratory testing due to the random distribution of conductive fibers within the body of the concrete. Numerical simulations facilitate proper modeling of such random distribution to improve the reliability of testing measures. Hence, this paper investigates the influence of fiber reinforcement characteristics on electrical resistivity using multi-physics finite element models. Results examine modeling challenges and include insights on the sensitivity of resistivity measures to fiber reinforcement. Concluding remarks provide expected bias of electrical resistivity in the presence of steel fibers and endeavor to facilitate the development of practical guidelines for assessing the durability of fiber-reinforced concrete members using standard electrical resistivity testing procedures. Full article
(This article belongs to the Special Issue Advances in Structure Mechanics and Finite Element Modelling)
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19 pages, 6714 KiB  
Article
A Numerical Model for Tracing Structural Response of Ultra-High Performance Concrete Beams
by Roya Solhmirzaei and Venkatesh Kodur
Modelling 2021, 2(4), 448-466; https://doi.org/10.3390/modelling2040024 - 1 Oct 2021
Cited by 7 | Viewed by 3733
Abstract
This paper presents a finite element-based numerical model for tracing the behavior of ultra-high performance concrete (UHPC) beams. The model developed in ABAQUS can account for stress–strain response of UHPC and reinforcing bar in both tension and compression, bond between concrete and reinforcing [...] Read more.
This paper presents a finite element-based numerical model for tracing the behavior of ultra-high performance concrete (UHPC) beams. The model developed in ABAQUS can account for stress–strain response of UHPC and reinforcing bar in both tension and compression, bond between concrete and reinforcing steel, and strain hardening effects in bars and UHPC and can trace the detailed response of UHPC beams in the entire range of loading. This model is validated by comparing predicted response parameters including load-strain, load-deflection, and crack propagation against experimental data governed from tests on UHPC beams with different reinforcement ratios, fiber volume fractions, and loading configurations (shear and flexural loading). The validated model is applied to quantify the contribution of stirrups and concrete to shear strength of beams so as to explore the feasibility of removing shear reinforcement in UHPC beams. Full article
(This article belongs to the Special Issue Advances in Structure Mechanics and Finite Element Modelling)
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17 pages, 8226 KiB  
Article
Improving Blast Performance of Reinforced Concrete Panels Using Sacrificial Cladding with Hybrid-Multi Cell Tubes
by Mahmoud Abada, Ahmed Ibrahim and S.J. Jung
Modelling 2021, 2(1), 149-165; https://doi.org/10.3390/modelling2010008 - 7 Mar 2021
Cited by 8 | Viewed by 3436
Abstract
The utilization of sacrificial layers to strengthen civilian structures against terrorist attacks is of great interest to engineering experts in structural retrofitting. The sacrificial cladding structures are designed to be attached to the façade of structures to absorb the impact of the explosion [...] Read more.
The utilization of sacrificial layers to strengthen civilian structures against terrorist attacks is of great interest to engineering experts in structural retrofitting. The sacrificial cladding structures are designed to be attached to the façade of structures to absorb the impact of the explosion through the facing plate and the core layer progressive plastic deformation. Therefore, blast load striking the non-sacrificial structure could be attenuated. The idea of this study is to construct a sacrificial cladding structure from multicellular hybrid tubes to protect the prominent bearing members of civil engineering structures from blast hazard. The hybrid multi-cell tubes utilized in this study were out of staking composite layers (CFRP) around thin-walled tubes; single, double, and quadruple (AL) thin-walled tubes formed a hybrid single cell tube (H-SCT), a hybrid double cell tube (H-DCT), and a hybrid quadruple cell tube (H-QCT). An unprotected reinforced concrete (RC) panel under the impact of close-range free air blast detonation was selected to highlight the effectiveness of fortifying structural elements with sacrificial cladding layers. To investigate the proposed problem, Eulerian–Lagrangian coupled analyses were conducted using the explicit finite element program (Autodyn/ANSYS). The numerical models’ accuracy was validated with available blast testing data reported in the literature. Numerical simulations showed a decent agreement with the field blast test. The proposed cladding structures with different core topologies were applied to the unprotected RC slabs as an effective technique for blast loading mitigation. Mid-span deflection and damage patterns of the RC panels were used to evaluate the blast behavior of the structures. Cladding structure achieved a desired protection for the RC panel as the mid-span deflection decreased by 62%, 78%, and 87% for H-SCT, H-DCT, and H-QCT cores, respectively, compared to the unprotected panels. Additionally, the influence of the skin plate thickness on the behavior of the cladding structure was investigated. Full article
(This article belongs to the Special Issue Advances in Structure Mechanics and Finite Element Modelling)
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