Research on Rate-Dependent Mechanical Properties of Ultra-High Strength Concrete

A special issue of Buildings (ISSN 2075-5309). This special issue belongs to the section "Building Materials, and Repair & Renovation".

Deadline for manuscript submissions: 31 December 2024 | Viewed by 1027

Special Issue Editors


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Guest Editor
Research Group of Advanced Concrete Structural Materials, Wuhan University, Wuhan 430072, China
Interests: ultra-high-strength concrete; dynamic loading; mechanical performance; multi-scale; acoustic emission

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Guest Editor
School of Architectural Engineering, Anhui Polytechnic University, Wuhu 243032, China
Interests: ultra-high-performance concrete; dynamic properties; strain rate; micromechanics; supplementary cementitious materials

Special Issue Information

Dear Colleagues,

Due to its ultra-high strength, excellent ductility, and good durability, Ultra-high-Performance Concrete (UHPC) is considered as a promising structural material for use in buildings which are vulnerable to dynamic loadings, i.e., earthquakes, explosions, crushing, etc. It has been widely acknowledged that damage to and the failure of a concrete structure can be attributed to the propagation and cumulation of cracking. From a multiscale point of view, the reasons for UHPC that contains aggregates cracking can be assigned to the aggregate, ITZ, or paste matrix fracturing. As such, understanding the rate-dependent mechanical properties of UHPC from a multiscale perspective is of vital importance for the design and assurance of the safety of structures exposed to dynamic loading.

Dr. Shaohua Li
Dr. Weitan Zhuang
Guest Editors

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Keywords

  • ultra-high performance concrete
  • dynamic properties
  • micromechanics
  • strain rate
  • mechanical performance
  • multi-scale

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Published Papers (1 paper)

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Research

16 pages, 12720 KiB  
Article
Mechanical Properties of Folding Arch Frame Joints for Unmanned Arch Erection
by Changfu Huang, Shaohua Li, Dewu Li, Wenbing Li, Tiejun Yao and Yong Xiao
Buildings 2024, 14(5), 1480; https://doi.org/10.3390/buildings14051480 - 19 May 2024
Viewed by 782
Abstract
The application of folding arch frames is deemed crucial for unmanned arch frame erection, with the selection of the joint form being a determining factor in the overall mechanical performance of the folding arch frame, particularly in influencing the primary support safety. In [...] Read more.
The application of folding arch frames is deemed crucial for unmanned arch frame erection, with the selection of the joint form being a determining factor in the overall mechanical performance of the folding arch frame, particularly in influencing the primary support safety. In light of the geological conditions of the New Wushaoling Tunnel project, three feasible joint forms for folding arch frames were proposed: buckle, adhesive, and interference-fit joints. Numerical simulations were conducted to analyze the arch’s overall mechanical and the joints’ local mechanical performances, aiming to identify the optimal joint form. On-site construction data were collected, and the effectiveness of unmanned arch frame erection was evaluated. The design requirements for the vertical displacement results of the steel arches with different joints were met. The maximum shear stress of the buckled arch frame was found to be the lowest, whereas that of the interference-fitted arch frame was the highest. The local shear stress of the adhesive joints was the lowest, while that of the interference-fit joint was the highest. Considering the material application limitations and calculation results, buckle joints are recommended. Unmanned arch frame erection, compared with manual arch frame erection, can save 66.6% of human resources and reduce the construction time by 33.3% to 50%. Statistical analysis has confirmed that the quality of automated arch construction can be guaranteed. Full article
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