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Buildings
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Advanced Analysis of Mechanical Behavior in Steel and Composite Structures
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Advanced Analysis of Mechanical Behavior in Steel and Composite Structures

A Special Issue of Buildings (ISSN 2075-5309) belonging to the section "Building Structures".

Deadline for manuscript submissions: 31 December 2026 | Viewed by 452

Editors

Dr. Pouria Ayough

E-Mail Website
Guest Editor
School of Civil Engineering, Chongqing University, Chongqing 400045, China
Interests: composite steel–concrete structures; wind turbine tower structures; structural performance under cyclic loading and seismic actions; experimental testing and nonlinear finite element modeling of structural members; structural strengthening and rehabilitation using advanced materials
Dr. Waleed Nawaz

E-Mail Website
Guest Editor
Department of Civil and Environmental Engineering, University of Technology Sydney, Sydney 2007, Australia
Interests: advanced concrete material; composite structures; CFRP strengthening of structures

Special Issue Information

Dear Colleagues,

Steel and composite structures are widely used in modern infrastructure due to their high strength, efficiency, and adaptability in diverse engineering applications. With the increasing demand for resilient, sustainable, and high-performance structures, a deeper understanding of their mechanical behavior under complex loading conditions has become essential. Structural response is often influenced by material nonlinearity, geometric effects, composite interaction, and multi-axial loading, which require advanced analytical, experimental, and numerical approaches for accurate assessment. Recent developments in high-strength materials, innovative composite systems, and computational modeling techniques have significantly enhanced the ability to predict and optimize structural performance. However, challenges remain in capturing failure mechanisms, interaction effects, and long-term behavior under extreme or coupled loading conditions.

This Special Issue aims to collect high-quality contributions focusing on the advanced analysis of steel and composite structures. Topics of interest include, but are not limited to, structural behavior under static, cyclic, and dynamic loading, stability and buckling, fatigue and fracture, nonlinear analysis, innovative materials and structural systems, and design-oriented methodologies. Both original research articles and comprehensive review papers are welcome.

Dr. Pouria Ayough
Dr. Waleed Nawaz
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 250 words) can be sent to the Editorial Office for assessment.

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-anonymized peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Buildings 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

  • steel structures
  • mechanical behavior
  • nonlinear analysis
  • stability and buckling
  • fatigue and fracture
  • numerical modeling
  • experimental investigation

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Published Papers (1 paper)

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Research

20 pages, 13407 KB  
Article
Interfacial Bond–Slip Behavior of Carbonated Recycled Aggregate Concrete-Filled Flat Steel Tubes: An Experimental Study
by Jiansheng Zhu, Xing Hu, Yingjie Zhang, Jie Yu, Pouria Ayough, Yi Sun, Wei Wei, Zhengzhi Xiao and Yinggang Li
Buildings 2026, 16(16), 3294; https://doi.org/10.3390/buildings16163294 - 19 Aug 2026
Viewed by 294
Abstract
The recycling of construction and demolition waste and the reduction of carbon emissions are important issues in sustainable construction. Recycled aggregate concrete (RAC) is promising for structural use, but the weak old mortar and multiple interfacial transition zones in recycled coarse aggregate (RCA) [...] Read more.
The recycling of construction and demolition waste and the reduction of carbon emissions are important issues in sustainable construction. Recycled aggregate concrete (RAC) is promising for structural use, but the weak old mortar and multiple interfacial transition zones in recycled coarse aggregate (RCA) may reduce the load-transfer capacity at the steel–concrete interface. To address this problem, this study developed carbonated recycled aggregate concrete-filled flat steel tube (FST-CRAC) members and investigated their interfacial bond–slip behavior through material strength tests and push-out tests on nine specimens. The effects of RCA replacement ratio, carbonation treatment, section aspect ratio, and width-to-thickness ratio were examined. RCA was carbonated at 0.5 MPa for 24 h. The 28-day compressive strength increased from 32.6 to 44.3 MPa in the uncarbonated P series and from 36.2 to 46.2 MPa in the carbonated T series. However, because the two series were developed through separate preliminary mix-design trials, these differences should be interpreted as being jointly associated with carbonation treatment and mix-proportion adjustments rather than as evidence of an isolated causal effect of carbonation. Push-out failure was governed by interfacial debonding, local crushing near the corners, and post-peak frictional slip, with damage consistently concentrated at the short sides and corners of the flat section. Carbonation treatment increased the peak bond load by 2.85–26.23%, with the largest benefit observed at a moderate replacement ratio, while increasing the RCA replacement ratio from 50% to 100% increased the peak load by 27.90% for uncarbonated specimens but only 4.21% for carbonated specimens, indicating that carbonation reduces the sensitivity of bond capacity to replacement ratio. A moderate increase in section aspect ratio increased the peak load by 22.30–25.86%, and reducing the width-to-thickness ratio increased the peak load by 5.95–40.92%. A four-linear bond–slip constitutive model was proposed to describe the full interfacial response, from initial bonding through peak degradation to residual friction. These findings provide experimental support for the use of carbonated recycled aggregates in steel tube-confined composite members and a basis for subsequent nonlinear analysis. Full article
(This article belongs to the Special Issue Advanced Analysis of Mechanical Behavior in Steel and Composite Structures)
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