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Innovative Structures Made of High-Performance Materials

A special issue of Materials (ISSN 1996-1944). This special issue belongs to the section "Construction and Building Materials".

Deadline for manuscript submissions: closed (20 November 2023) | Viewed by 4297

Special Issue Editors


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Guest Editor
Department of Civil Engineering, School of Human Settlements and Civil Engineering, Xi'an Jiaotong University, Xi'an, China
Interests: Fiber-reinforced polymer (FRP); high-strength steel (HSS); ultra-high-performance concrete (UHPC); fatigue simulation; fracture simulation; multiscale simulation; composite structures
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Guest Editor
School of Human Settlements and Civil Engineering, Xi’an Jiaotong University, Xi’an 710049, China
Interests: steel structure principle and design; steel-reinforced concrete composite structures; structural seismic resistance; reduction and vibration control
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

The development of civil engineering structures is inseparable with the development of materials. Recently, the use of high-performance materials such as fiber-reinforced polymer (FRP), engineered cementitious composite (ECC), ultra-high-performance concrete (UHPC), high-strength steel (HSS) etc. has gradually increased in civil engineering. The application of high-performance materials in civil engineering benefits long-span and high-rise structures. 

To promote the application of high-performance materials in civil engineering, this Special Issue aims to provide the data, models, and tools necessary to assess the failure mechanisms, fatigue damage calculation, stability behavior, and durability of innovative structures made of high-performance materials. Researchers are invited to provide original research and review articles that seek accurate and efficient failure analysis, fatigue damage evaluation, bulking analysis, and long-term behavior prediction related to structures made of high-performance materials. 

Prof. Dr. Haohui Xin
Prof. Dr. Qing Sun
Guest Editors

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Keywords

  • fiber-reinforced polymer (FRP)
  • ultra-high-performance concrete (UHPC)
  • high-strength steel (HSS)
  • fatigue
  • fracture

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Published Papers (2 papers)

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Research

23 pages, 10408 KiB  
Article
Fatigue Tests and Analysis on Welded Joints of Weathering Steel
by Rongrong Sheng, Yuqing Liu, Ying Yang, Rui Hao and Airong Chen
Materials 2022, 15(19), 6974; https://doi.org/10.3390/ma15196974 - 8 Oct 2022
Cited by 3 | Viewed by 1779
Abstract
To investigate the fatigue performance of vertical web stiffener to deck plate welded joints in weathering steel box girders, six specimens of the weathering steel (WS) Q345qNH, four specimens of WS Q420qNH, and four specimens of the plain carbon steel (CS) Q345q for [...] Read more.
To investigate the fatigue performance of vertical web stiffener to deck plate welded joints in weathering steel box girders, six specimens of the weathering steel (WS) Q345qNH, four specimens of WS Q420qNH, and four specimens of the plain carbon steel (CS) Q345q for comparison were tested by a vibratory fatigue testing machine, considering different steel grades, yield strengths, stiffener plate thicknesses, and weld types. The fatigue strength was evaluated based on S-N curves and the crack propagation was analyzed by linear elastic fracture mechanics (LEFM). The results show that the fatigue crack of the welded joints was initiated from the end weld toe of the deck plate and subsequently propagated both along the thickness of the deck plate and in the direction perpendicular to the stiffener plate. The fatigue crack initiation and propagation life of WS Q345qNH specimens were longer than those of CS Q345q specimens. The fatigue crack propagation life of WS Q345qNH specimens was longer than that of WS Q420qNH specimens, while the initiation life bore little relationship to the yield strength. Increasing the stiffener plate thickness effectively delayed crack initiation and slowed down its propagation. Compared with fillet welds, full penetration welds extended the fatigue crack propagation life, while no significant improvement was implied for the initiation life. The WS and CS specimens could be classified as having the same fatigue strengths by nominal stress, hot spot stress, and effective notch stress approaches, which were FAT 50, FAT 100, and FAT 225, respectively. Meanwhile, their material constants for LEFM were relatively close to each other. Full article
(This article belongs to the Special Issue Innovative Structures Made of High-Performance Materials)
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21 pages, 15495 KiB  
Article
Experimental and Analytical Research on Flexural Behavior of Concrete-Filled High-Strength Steel Tubular Members
by Zai-Yu Zhang, Qing Sun, Jia-Qi Wang, Chao Zhao, Bing-Zhen Zhao and Jian-Tao Wang
Materials 2022, 15(11), 3790; https://doi.org/10.3390/ma15113790 - 26 May 2022
Cited by 2 | Viewed by 1798
Abstract
Using high-strength steel (yield strength fy ≥ 460 MPa) in concrete-filled steel tubes is expected to provide a superior bearing capacity by achieving light weight and efficient construction, but the existing design limitation on diameter-to-thickness (D/t) ratios for concrete-filled high-strength [...] Read more.
Using high-strength steel (yield strength fy ≥ 460 MPa) in concrete-filled steel tubes is expected to provide a superior bearing capacity by achieving light weight and efficient construction, but the existing design limitation on diameter-to-thickness (D/t) ratios for concrete-filled high-strength steel tubular (CFHST) members inevitably obstructs its wide application. In this study, aiming at the application of circular CFHST members using Q690 steel (fy ≥ 690 MPa), a total of 15 CFHST beams were examined using a three-point loading test to investigate the failure mode, bearing capacity and plasticity evolution. Subsequently, finite element models (FEMs) were established to analyze the full-range curves, composite effect, failure mechanism and influences of key parameters including material strengths, D/t ratios, and shear-span ratios. A simplified calculation method for bearing capacity was finally proposed and verified. The results indicate that the full-range performance of tested CFHST members with out-of-code D/t ratios have ductile behavior, though they fail through the mode of steel fracture and concrete cracks in the tension zone as well as through local buckling in the compression zone; out-of-code CFHST members (e.g., D/t = 120) can perform reasonable composite behavior because of contact pressure larger than 2.5 MPa, where a thin-walled steel tube experiences an arch failure mechanism similar to core concrete at a trussed angle of 45°; the simplified bearing capacity model achieves a mean value of 0.97, and can be accepted as a primary tool to perform structural design and performance evaluation. Full article
(This article belongs to the Special Issue Innovative Structures Made of High-Performance Materials)
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