Toughening static and dynamic damping characteristics of ultra-high performance concrete via interfacial modulation approaches

Wei, Huinan; Liu, Tiejun; Zhou, Ao; Zou, Dujian; Li, Ye

doi:10.1016/j.cemconcomp.2022.104879

Cited by 12 publications

(5 citation statements)

References 40 publications

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“…To reduce the porosity and improve the microstructure of UHPC, optimal mixture proportion designs should be developed 43,44 . The commonly used strategy involves relies on application of fibers and mineral additives, which can create the matrix with low porosity, higher strength, better failure behavior, and improve compressive strength of UHPC to 150-200 MPa 29,[45][46][47][48] . The used fibers for the development of UHPC are summarized in Table 1, which evaluates the tensile strength and Young's modulus of different fibers employed in concrete, providing a comparative analysis [49][50][51] .…”

Section: Fundamentals Of Fiber-reinforced Uhpcmentioning

confidence: 99%

“…The first approach is the sequential multiscale modeling, includes decoupling the scales and employing corresponding methods for analysis at each scale sequentially 29,97 . In atomistic scale, the atomic configuration and interatomic interactions are monitored through first principles and MD simulations [66][67][68]157 .…”

Section: Research Progress In Multiscale Mechanicsmentioning

confidence: 99%

“…Currently, the available methods for mechanical analysis at the microscopic scale include firstprinciples calculations and Molecular Dynamics (MD). Among them, MD is a nanoscale simulation method based on interatomic interactions 28,29 . Extensive research has demonstrated that MD simulations can effectively elucidate deformation and failure mechanisms of materials [30][31][32][33][34] , thereby establishing a crucial physical foundation for cross-scale mechanical analysis 35 .…”

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confidence: 99%

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Multiscale perspectives for advancing sustainability in fiber reinforced ultra-high performance concrete

Wang,

Chow,

Lau

2024

npj Mater. Sustain.

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Ultra-high performance concrete (UHPC) integrates cutting-edge nano-additives, fibers and cementitious materials, which is a representative heterogeneous material and exhibits distinctive multi-scale structural characteristics. With remarkable durability and mechanical properties, lower embodied energy and diminished carbon emissions compared to conventional concrete, the application of UHPC aligns with the principles of sustainable development. To accelerate these advances, researchers of construction materials have incorporated a multiscale perspective into UHPC studies. From the perspective of sustainability, we evaluate the latest advances in the design, application and innovation of UHPC under multiscale perspective. Based on the fundamentals of fiber-reinforced UHPC, we discuss why and how could multiscale mechanics research, including analytical and modeling methods helps the advances of its sustainability, emphasizing the ecological considerations of UHPC in the practical applications. Then we summarize the challenges and perspectives in the design, production and construction of UHPC materials and structures. Based on advances in multiscale mechanics, a bright future can be envisioned where sustainable UHPC is applied globally, led by additive manufacturing and artificial intelligence.

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Section: Fundamentals Of Fiber-reinforced Uhpcmentioning

confidence: 99%

Section: Research Progress In Multiscale Mechanicsmentioning

confidence: 99%

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confidence: 99%

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Multiscale perspectives for advancing sustainability in fiber reinforced ultra-high performance concrete

Wang,

Chow,

Lau

2024

npj Mater. Sustain.

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“…Another issue is the low internal damping ratio in high-strength concrete, where the reduction of porosity and water in the mix can lead to insufficient damping performance. This can pose a threat to structures under extreme dynamic loading conditions [6,7].…”

Section: Introductionmentioning

confidence: 99%

Analytical Evaluation of Natural Frequencies in Hollow-Core Slabs: A PracticalMethodology for Civil Engineering Applications

Zenatti,

Silveira,

Gidrão

et al. 2024

Preprint

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This study presents an analytical methodology for predicting the natural frequencies ofhollow-core slab panels, addressing a significant research and application need instructural engineering. The study suggests a numerical-experimental calibrationutilizing the Finite Element Method (FEM) via ANSYS software to assess the modalresponse of prestressed hollow core slabs investigated by Marcos (2015). Through thedevelopment of Irvine's equation, this research proposes a simplified methodology fordetermining the natural frequency of slabs. The slabs are modeled as simply supportedbeams, and Irvine's equations are applied to simplify several degrees of freedomstructure (SDOF) and determine the natural frequencies for various spans. Thevalidation of the numerical-experimental model indicates a maximum error of 8.32\% inthe third vibration mode, demonstrating the accuracy and practicality of the proposedanalytical method. This approach could be useful in determining the vibrationserviceability presented in ABNT NBR 6118:2023. It can help engineers andmanufacturers ensure structural compliance and vibration serviceability.

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“…Underwater structures are susceptible to shear forces attributed to wave action, water flow, and dynamic loading. Understanding the modulus of rigidity becomes a critical factor in assessing the concrete's ability to counter these shear forces, thereby averting shear-related failures that could lead to cracking and deformations [7][8]. The notion of Poisson's ratio comes into play when anticipating how a material will deform under axial or lateral loads.…”

Section: Introductionmentioning

confidence: 99%

Dynamic Characterization Assessment and Optimization of Reactive Powder Underwater Concrete

AlSaffar,

Al-Shathr,

Abed

2023

ETJ

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AWA promotes fiber distribution within the concrete mix • AWA molecules' bonding could promot fiber's impact on dynamics characterization. • Increasing microsteel fiber (MS) content from 1% to 1.5% significantly enhances impact resistanceThis study investigates the dynamic properties of Reactive Powder Underwater Concrete (RPUWC), a novel composite integrating attributes of Reactive Powder Concrete and underwater cast concrete. The study focuses on assessing the impact resistance, dynamic modulus of elasticity, rigidity, and Poisson's ratio. The influence of micro steel fibers (MS) at different volume fractions (1%, 1.25%, and 1.5%) and different anti-washout admixture (AWA) dosages (0.5%, 0.7%, and 0.9%) are examined. The findings indicate that increasing the MS content improves crack resistance and energy absorption, resulting in a substantial 155.6% enhancement in the first crack resistance when using 1.5% MS. Additionally, ultimate resistance improves by 158%. Furthermore, there are significant increases in the dynamic and modulus of rigidity as the MS percentage rises. The impact of AWA is rather limited, with a reduction in the dynamic modulus of 18.3% for 0.7% AWA and 30% for 0.9% AWA. Likewise, the modulus of rigidity decreases by 13% for 0.7% AWA and 23.9% for 0.9% AWA. Moreover, strong positive correlations between non-destructive testing (NDT) and ASTM C 215 equations are observed. This investigation addresses a significant knowledge gap, shedding light on optimizing underwater structures' performance by comprehending their dynamic response under varied MS and AWA ratios.

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Toughening static and dynamic damping characteristics of ultra-high performance concrete via interfacial modulation approaches

Cited by 12 publications

References 40 publications

Multiscale perspectives for advancing sustainability in fiber reinforced ultra-high performance concrete

Multiscale perspectives for advancing sustainability in fiber reinforced ultra-high performance concrete

Analytical Evaluation of Natural Frequencies in Hollow-Core Slabs: A PracticalMethodology for Civil Engineering Applications

Dynamic Characterization Assessment and Optimization of Reactive Powder Underwater Concrete

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