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Special Issue "Advances in Analysis and Performance of Reinforced Concrete Structures"

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Prof. Dr. Yongxing Zhang
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Guest Editor

College of Civil Engineering, Nanjing Forestry University, Nanjing, China
Interests: concrete structure; strain hardening cementitious composites; strengthening; refined numerical analysis; tunnel concrete lining; underground structure

Special Issue Information

Dear Colleagues,

It is my pleasure to announce this Special Issue of Materials, which will focus on the analysis and performance of reinforced concrete (RC) structures. As we all known, RC structures have been widely used in all the area of civil engineering, which are built for meeting the diversified functional requirements in the varied engineering industries. More recently, the performance of RC structures applied in the extreme condition has been intensively investigated and aroused great interest among the researchers, targeting the application in the harsh environment, which can significantly improve the advances in concrete structures. However, the performance of RC structures has not yet been understood clearly until now, and the in-depth study is required.

This Special Issue aims to provide a platform for the discussion of analysis and performance of RC structures used in all the area of civil engineering, including not only building engineering but also transport infrastructure as well as special engineering. Theoretical analysis of RC structure Numerical analysis of RC structure Performance of RC and structure in building engineering Performance of RC structure in transport infrastructure Performance of RC structure in special engineering Behavior of RC structure in extreme condition or harsh environment.

Prof. Dr. Yongxing Zhang
Guest Editor

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Keywords

reinforced concrete structures
UHPC structure
analysis
performance
building engineering
infrastructure engineering
underground engineering
special engineering.

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Research

Open AccessArticle

Concrete Cover Cracking and Reinforcement Corrosion Behavior in Concrete with New-to-Old Concrete Interfaces

and

Materials 2023, 16(17), 5969; https://doi.org/10.3390/ma16175969 - 31 Aug 2023

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Abstract

In reinforced concrete (RC) structures, new-to-old concrete interfaces are widely present due to precast splices, repairs, and construction joints. In this paper, both monolithic and segmental specimens were fabricated with five kinds of water–cement ratios, including ordinary and high-strength concrete. The impressed current-accelerated corrosion test was used, and the degree of reinforcement corrosion was controlled by Faraday’s Law. In the accelerated corrosion process, the concrete surface cracking, steel corrosion, and mechanical properties of the corroded steels in the segmental specimens were investigated and compared with monolithic specimens considering the pouring method, concrete strength, and the strength difference between new and old concrete. The prediction of concrete cracking time was also discussed. The results indicated that, for the monolithic specimens, longitudinal cracks could be observed on the ordinary concrete surface, while no cracks were produced on a high-strength concrete surface; only the rust leaked out at the ends. For the segmental specimens, both longitudinal and transverse cracks were produced on an ordinary concrete surface, while only transverse cracks were produced at the high-strength new-to-old concrete interfaces. The steel embedded in the segmental specimens suffered more sectional loss at the new-to-old concrete interfaces. An influence coefficient based on the section loss of the rebar was proposed to evaluate the influence of interfaces on the rust uniformity of rebars. When there were differences in strength between new and old concrete, the influence of the interface on the uniformity of steel bar cross-section loss slightly increased. Based on available theoretical analysis for uniform corrosion, the concrete cracking time of the monolithic specimens was predicted, which was basically consistent with experimental phenomena. However, further research is needed to predict the service life of segmental specimens with new-to-old concrete interfaces. Full article

(This article belongs to the Special Issue Advances in Analysis and Performance of Reinforced Concrete Structures)

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Open AccessArticle

Study on In-Plane Initial Rotational Stiffness of Eccentric RHS Beam-Column Joints

Xiaonong Guo

Weixin Li

and

Zeyu Xv

Materials 2023, 16(14), 5103; https://doi.org/10.3390/ma16145103 - 20 Jul 2023

Viewed by 427

Abstract

The eccentric RHS (rectangular hollow sections) joint offers improved mechanical properties and better space utilization. Its use in frame structures has gained significant attention. Currently, the initial rotational stiffness of RHS joints, the simplified finite element analysis method of eccentric RHS joints, and the influence of the spatial effect of RHS joints are still unknown. The purpose of this research is to establish a calculation formula for the initial rotational stiffness of eccentric RHS joints, study the influence of the spatial effect under complex stress conditions, and propose a mathematical model that can be used to simplify the analysis of eccentric RHS joints. The research findings indicate that the web plate’s deformation stiffness primarily influences the joints’ initial rotational stiffness. This increases with a higher beam-to-column depth-to-width ratio, beam-to-column thickness ratio, and column width-to-thickness ratio. The form of the moment distribution in the joint changes, and begins to have a significant effect on the rotational stiffness when the beam-to-column flange width ratio reaches and exceeds 0.7. The stiffeners have a direct additive effect on the joint stiffness. The influence of adjacent beams on the joint is minimal, and the spatial effect of the joint can be disregarded. Furthermore, the finite element analysis confirmed the accuracy of the power function model in accurately simulating the static load behavior of the joint, particularly the bending moment–angle relationship. Full article

(This article belongs to the Special Issue Advances in Analysis and Performance of Reinforced Concrete Structures)

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Special Issue "Advances in Analysis and Performance of Reinforced Concrete Structures"

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