Relationship between internal viscous damping and stiffness of concrete material and structure

Liang, Chaofeng; Wang, Yuanfeng; Wang, Chunhui; Mei, Shengqi

doi:10.1002/suco.202000628

Cited by 11 publications

(3 citation statements)

References 43 publications

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“…Several studies have proposed that structural stiffness was strongly correlated with damping [ 49 ]. Previous research also confirmed a negative correlation between stiffness and internal viscous damping [ 50 ]. Thus, this paper selected stiffness as a mediation variable and investigated their dependencies accordingly.…”

Section: Resultssupporting

confidence: 66%

Effect of 3D Printing Process Parameters on Damping Characteristic of Cantilever Beams Fabricated Using Material Extrusion

Ning

Khan

2023

Polymers

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The present paper aims to investigate the process parameters and damping behaviour of the acrylonitrile butadiene styrene (ABS) cantilever beam manufactured using material extrusion (MEX). The research outcome could guide the manufacture of MEX structures to suit specific operating scenarios such as energy absorption and artificially controlled vibration responses. Our research used an experimental approach to examine the interdependencies between process parameters (nozzle size, infill density and pattern) and the damping behaviour (first-order modal damping ratio and loss factor). The impact test was carried out to obtain the damping ratio from the accelerometer. A dynamic mechanical analysis was performed for the loss factor measurement. The paper used statistical analysis to reveal significant dependencies between the process parameters and the damping behaviour. The regression models were also utilised to evaluate the mentioned statistical findings. The multiple third-order polynomials were developed to represent the relation between process parameters and modal damping ratio using stiffness as the mediation variable. The obtained results showed that the infill density affected the damping behaviour significantly. Higher infill density yielded a lower damping ratio. Nozzle size also showed a notable effect on damping. A high damping ratio was observed at a significantly low value of nozzle size. The results were confirmed using the theoretical analysis based on the underlying causes due to porosity in the MEX structure.

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Section: Resultssupporting

confidence: 66%

Effect of 3D Printing Process Parameters on Damping Characteristic of Cantilever Beams Fabricated Using Material Extrusion

Ning

Khan

2023

Polymers

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“…The damping evaluation of concrete materials has been proposed by many researchers, Liang et al proposed a vibration amplitude attenuation coefficient 28 . In this study, the damping ratio calculation method was adopted from Clough et al 29 The definition of the damping ratio is shown in Equation ().

ζ_{s} goodbreak= \frac{\ln ((), y_{m} / y_{n})}{2 ((), n goodbreak- m) π}

where y i is the amplitude at the i th cycle, therefore, the damping ratio could be calculated through the arbitrary two amplitude.…”

Section: Experiments Results and Analysismentioning

confidence: 99%

“…The damping evaluation of concrete materials has been proposed by many researchers, Liang et al proposed a vibration amplitude attenuation coefficient. 28 In this study, the damping ratio calculation method was adopted F I G U R E 1 0 The calculated impact time and impact force of different materials from Clough et al 29 The definition of the damping ratio is shown in Equation (5).…”

Section: Damping Ratiomentioning

confidence: 99%

Experimental and analytical studies of the dynamic behavior of particle dampers prepared with waste cement‐based materials

Wang

Xiao

Wang

et al. 2022

Structural Concrete

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The particle damper made of steel balls has a great capability of vibration attenuation. However, its noise causes serious problems in the comfortability of structures. In this study, waste concrete aggregates and powders are utilized as particles in particle dampers, aiming to reduce the generated noise and achieve comparable performance as well as better environmental and ecological benefits.The parameters, including damper type, particle materials, earthquake waves, particle number, and tunning frequency on the damping performance, are investigated through free vibration test and shaking table tests. The results show that the damping ratio and seismic performance of this novel damper are comparable to those of the steel particle dampers. Moreover, simulation was conducted based on theoretical analysis. Finally, the generated sound is tested and proved less than the commonly adopted steel ball damper. This study can encourage the application of particle dampers by reducing noise and cost, besides, promotes the environmental benefits by extending the usage of recycled building materials.

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Effect of nano‐SiO₂ dispersion on the mechanical properties and frost resistance of modified cement paste

Pei,

Zhang,

Zhao

et al. 2024

Structural Concrete

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The dispersion of nano‐SiO2 (NS) in cement plays a critical role in enhancing the properties of cementitious materials. In this study, the combination of ultrasonic dispersion and polycarboxylic acid water reducing agent (PCE) was used to significantly improve the dispersion of NS. The effects of ultrasonic dispersion time, NS content, and PCE content on dispersion quality were investigated, alongside their impact on mechanical properties, electrical resistivity, and frost resistance. The results demonstrated that this synergistic method optimized the dispersion of NS, leading to superior mechanical properties and frost resistance. With an ultrasonic dispersion time of 40 min, NS content of 1.0 wt.%, and PCE content of 0.75 wt.%, the cement paste achieved its optimal performance. Compared to non‐dispersed samples, compressive strength increased by 33.7%. After 75 freeze–thaw cycles, the mass loss was 2%, the relative dynamic elastic modulus was 99.15%, and the strength loss was 13.74%.

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Relationship between internal viscous damping and stiffness of concrete material and structure

Cited by 11 publications

References 43 publications

Effect of 3D Printing Process Parameters on Damping Characteristic of Cantilever Beams Fabricated Using Material Extrusion

Effect of 3D Printing Process Parameters on Damping Characteristic of Cantilever Beams Fabricated Using Material Extrusion

Experimental and analytical studies of the dynamic behavior of particle dampers prepared with waste cement‐based materials

Effect of nano‐SiO₂ dispersion on the mechanical properties and frost resistance of modified cement paste

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Relationship between internal viscous damping and stiffness of concrete material and structure

Cited by 11 publications

References 43 publications

Effect of 3D Printing Process Parameters on Damping Characteristic of Cantilever Beams Fabricated Using Material Extrusion

Effect of 3D Printing Process Parameters on Damping Characteristic of Cantilever Beams Fabricated Using Material Extrusion

Experimental and analytical studies of the dynamic behavior of particle dampers prepared with waste cement‐based materials

Effect of nano‐SiO2 dispersion on the mechanical properties and frost resistance of modified cement paste

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Product

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Effect of nano‐SiO₂ dispersion on the mechanical properties and frost resistance of modified cement paste