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Symmetry
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Symmetry/Asymmetry in Structural Engineering and Structural Mechanics
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Symmetry/Asymmetry in Structural Engineering and Structural Mechanics

A special issue of Symmetry (ISSN 2073-8994). This special issue belongs to the section "Engineering and Materials".

Deadline for manuscript submissions: closed (31 December 2024) | Viewed by 3705

Special Issue Editor

Dr. Lei Jiang

E-Mail Website
Guest Editor
Associate Professor, School of Highway, Chang'an University, Xi'an 710064, China
Interests: steel and composite bridges; high-performance bridge structures; accelerated bridge construction; fatigue assessment of bridges

Special Issue Information

Dear Colleagues,

In civil engineering, some structures and construction possess some kind of symmetries and asymmetries, such as buildings, bridges, etc. The advantages of the symmetry and asymmetry of a structural system in simplifying the mathematical model to solve both the statics and dynamics problems are quite obvious. Additionally, the application of symmetry and asymmetry in the design and construction of civil structures can effectively lead to attractive architectural appearance and reduce the time cost. In the field of structural health monitoring (SHM), the complicated monitoring point arrangement can be simplified by making full use of the principles of symmetry and asymmetry. This Special Issue invites original technical papers that focus on the use of symmetry and asymmetry in structural engineering and structural mechanics.

Dr. Lei Jiang
Guest Editor

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. Symmetry is an international peer-reviewed open access monthly 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 2400 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

  • symmetrical/asymmetrical structures
  • symmetrical/asymmetrical mechanics
  • structural design
  • structural con-struction
  • structural analysis
  • mathematical model
  • finite element model
  • structural health monitoring

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Further information on MDPI's Special Issue policies can be found here.

Published Papers (3 papers)

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Research

22 pages, 6337 KiB  
Article
Experimental Investigation on the Effectiveness of EB-CFRP Confinement of Elliptical Concrete Columns
by Zine El Abidine Benzeguir, Omar Chaallal, Ahmed Godat and Rami A. Hawileh
Symmetry 2024, 16(12), 1595; https://doi.org/10.3390/sym16121595 - 29 Nov 2024
Viewed by 555
Abstract
This paper presents the results of an experimental study involving 20 tests performed on elliptical concrete columns confined with externally bonded carbon fiber-reinforced polymer (EB-CFRP) laminates. The study aimed to evaluate the effects of elliptical aspect ratio (A/B) as well as confinement rigidity [...] Read more.
This paper presents the results of an experimental study involving 20 tests performed on elliptical concrete columns confined with externally bonded carbon fiber-reinforced polymer (EB-CFRP) laminates. The study aimed to evaluate the effects of elliptical aspect ratio (A/B) as well as confinement rigidity (number of EB-FRP layers) on confinement effectiveness. The experimental program consisted of one series of control concrete columns (unstrengthened) and three additional series, each one strengthened with one, two and three layers of EB-CFRP sheets, respectively. Furthermore, each series considered five elliptical aspect ratios (A/B) ranging from 1.0 to 1.6. Following compressive concentric tests until failure, the results were analyzed to characterize the confinement level with an increasing number of EB-CFRP layers as a function of the elliptical aspect ratio. The results show considerable enhancements in compressive strength and in the ductility of the confined columns. Furthermore, this improvement is amplified as the number of EB-CFRP layers increases, indicating a proportional relationship between the compressive strength and the number of CFRP layers. It is found that the ultimate strength of EB-CFRP-confined columns with three layers reached up to 130% compared to the control specimens. However, increasing the elliptical aspect ratio reduced the compressive strength and ductility of confined columns. This study investigated the relation between the CFRP hoop and axial strains and the elliptical aspect ratios. Moreover, through comparison, the results reveal that the prediction models proposed by the Canadian standards S806-12 and S6-19 do not capture the negative effect of the elliptical aspect ratio in confined concrete columns. Full article
(This article belongs to the Special Issue Symmetry/Asymmetry in Structural Engineering and Structural Mechanics)
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18 pages, 13272 KiB  
Article
Finite Element Simulation Analysis of the Influence of Pile Spacing on the Uplift Bearing Performance of Concrete Expanding-Plate Pile Groups
by Yongmei Qian, Shengbo Lin, Zunpeng Liu, Da Teng and Huaqiang Li
Symmetry 2024, 16(6), 731; https://doi.org/10.3390/sym16060731 - 12 Jun 2024
Viewed by 814
Abstract
Concrete expanding-plate piles (CEP piles) represent a novel type of variable cross-section concrete cast-in-place pile, wherein one or more bearing plates are added to the pile body to enhance its load-bearing capacity. Compared to traditional uniform-diameter uplift piles, the bearing plates of CEP [...] Read more.
Concrete expanding-plate piles (CEP piles) represent a novel type of variable cross-section concrete cast-in-place pile, wherein one or more bearing plates are added to the pile body to enhance its load-bearing capacity. Compared to traditional uniform-diameter uplift piles, the bearing plates of CEP uplift piles provide additional resistance against uplift, substantially increasing the pile’s uplift bearing capacity. CEP piles exhibit a wide range of application potential in structures such as high-rise buildings, cable-stayed bridges, and offshore platforms. However, due to changes in the load-bearing mechanism, the pile–soil interaction of CEP piles significantly differs from that of straight-shaft piles. Theories applicable to the group effect of straight-shaft piles cannot be directly applied to CEP piles, which has led to imperfections in the theoretical framework for designing CEP piles in practical engineering applications, hindering their broader adoption. Therefore, this paper employs a finite element simulation analysis to study the failure modes of three groups of symmetrically arranged CEP pile groups. The effects of pile spacing on the uplift bearing capacity of CEP pile groups are investigated, leading to a revision of the formula for calculating the uplift bearing capacity of CEP pile groups. This study enhances the theoretical understanding of the load-bearing behavior of CEP pile groups, providing a theoretical basis for their practical engineering applications. Full article
(This article belongs to the Special Issue Symmetry/Asymmetry in Structural Engineering and Structural Mechanics)
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38 pages, 16039 KiB  
Article
Application of Novel Concrete-Filled Built-Up K-Joints with Different Brace Sections in a Double-Deck Truss Bridge with a Symmetric Deck System with Dense Crossbeams
by Mampiandra N. H. Zafimandimby, Yongjian Liu, Lei Jiang and Xindong Zhao
Symmetry 2023, 15(10), 1876; https://doi.org/10.3390/sym15101876 - 6 Oct 2023
Viewed by 1480
Abstract
To facilitate the first application of the novel concrete-filled built-up K-joints with different brace sections in truss bridges, the present paper aims to determine their practicability through a comparison with integral joints. First, a structural analysis was carried out using the MIDAS CIVIL [...] Read more.
To facilitate the first application of the novel concrete-filled built-up K-joints with different brace sections in truss bridges, the present paper aims to determine their practicability through a comparison with integral joints. First, a structural analysis was carried out using the MIDAS CIVIL software to evaluate the loading applied to the structure. Additionally, boundary condition analysis was carried out. After that, the symmetric multi-planar joints were developed, using Abaqus 6.14 for the strength verification and the failure mode identification. These were followed by the multi-planar joints estimate cost. The results indicated that for positive bending, the novel joint deformed by 2.01 mm, compared to 4.83 mm for the integral joint in the serviceability limit state. These deformations were equal to 5.58 mm and 7.68 mm, respectively, in the negative bending. Verification under the ultimate limit state indicated a deformation of 10.43 mm for the novel joint type and 16.59 mm for the integral joint in the positive bending, whereas deformations of 15.89 mm and 16.82 mm were indicated in the negative bending. Moreover, a failure mode analysis showed a buckling of the arc yielding for the novel joint type and a buckling of the gusset plate for the integral joint. Finally, the results showed that the novel type of joint was more expensive by about CNY 111,286.06. Full article
(This article belongs to the Special Issue Symmetry/Asymmetry in Structural Engineering and Structural Mechanics)
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