Dynamic Mechanical Properties of EPS Concrete Under Impact Loading

Hu, Jun; Ren, Jianwei; Wu, Deyi

doi:10.1007/s12204-019-2042-1

Cited by 9 publications

(4 citation statements)

References 9 publications

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“…However, mature theoretical and empirical formulas for the changes in material parameters under hydrostatic pressure are unavailable, and experimental research remains the main focus. A measurement method for the dynamic mechanical parameters of rubber materials under hydrostatic pressure in a hydroacoustic tube, which has high testing accuracy and a wide testing frequency range, was established by Huang et al (2013). Comparison results between the calculated acoustic absorption coefficient and the experimental results based on the measured material parameters confirmed the effectiveness of the method.…”

Section: Analysis Methods Of Acoustic Performance Under Hydrostatic P...mentioning

confidence: 82%

Review of Underwater Anechoic Coating Technology Under Hydrostatic Pressure

Jia,

Jin,

2024

J. Marine. Sci. Appl.

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The underwater anechoic coating technology, which considers pressure resistance and low-frequency broadband sound absorption, has become a research hotspot in underwater acoustics and has received wide attention to address the increasingly advanced low-frequency sonar detection technology and adapt to the working environment of underwater vehicles in deep submergence. One the one hand, controlling low-frequency sound waves in water is more challenging than in air. On the other hand, in addition to initiating structural deformation, hydrostatic pressure also changes material parameters, both of which have a major effect on the sound absorption performance of the anechoic coating. Therefore, resolving the pressure resistance and acoustic performance of underwater acoustic coatings is difficult. Particularly, a bottleneck problem that must be addressed in this field is the acoustic structure design with low-frequency broadband sound absorption under high hydrostatic pressure. Based on the influence of hydrostatic pressure on underwater anechoic coatings, the research status of underwater acoustic structures under hydrostatic pressure from the aspects of sound absorption mechanisms, analysis methods, and structural designs is reviewed in this paper. Finally, the challenges and research trends encountered by underwater anechoic coating technology under hydrostatic pressure are summarized, providing a reference for the design and research of low-frequency broadband anechoic coating.

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Section: Analysis Methods Of Acoustic Performance Under Hydrostatic P...mentioning

confidence: 82%

Review of Underwater Anechoic Coating Technology Under Hydrostatic Pressure

Jia,

Jin,

2024

J. Marine. Sci. Appl.

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“…In many countries, lots of hydraulic structures are built in the alpine cold region; with low temperatures and frequent earthquakes, the dynamic mechanical safety performance of the RCHAC core wall has always been the concern of researchers. There have been many efforts to study the mechanical properties and failure mechanisms of RCHAC [ 2 , 3 , 4 , 5 , 6 ]; the majority of these, however, ignored the effect that size has on mechanical properties, while many studies showed that the size of the specimen has a significant effect on the mechanical properties of heterogeneous concrete-like materials [ 7 , 8 , 9 , 10 , 11 ]. Therefore, another noteworthy aspect is the influence of the specimen size on the mechanical properties and failure mechanisms in the mechanical research of HAC.…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation of the Size Effect on Roller-Compacted Hydraulic Asphalt Concrete under Different Strain Rates of Loading

Meng,

Liu,

Ning

et al. 2024

Materials

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Asphalt concrete is widely used in hydraulic structure facilities as an impermeable structure in alpine cold regions, and its dynamic mechanical properties are influenced by the strain rate and specimen size. However, the specimen size has an important effect on mechanical properties; few systematic studies have investigated on the size effect of hydraulic asphalt concrete (HAC) under dynamic or static loading rates. In the present study, four sizes of cylindrical roller-compacted hydraulic asphalt concrete (RCHAC) specimens with heights of 50 mm, 100 mm, 150 mm, and 200 mm were prepared and tested under different loading rates ranging from 10−5 s−1 to 10−2 s−1 to investigate the size effects of mechanical properties and failure modes at the temperature of 5 °C. The effect of strain rate on the size effects of the compressive strength and the elastic modulus of RCHAC have also been explored. These tests indicate that when the specimen size increases, the compressive strength and failure degree decrease, while the elastic modulus increases. When the height increases from 50 mm to 200 mm, the compressive strength at different strain rates decreased by more than 50%. Furthermore, the elastic modulus increased by about 211.8% from 0.51 GPa to 1.59 GPa at a strain rate of 10−5 s−1, and increased by 150% from 5.08 GPa to 12.71 GPa at a strain rate of 10−2 s−1. As the strain rate increases, the variation trends with the size of the compressive strength, elastic modulus, and failure degree are distinctly intensified. A modified dynamic size effect law, which incorporates both the specimen size and strain rate, is proposed and verified to illustrate the dynamic size effect for the RCHAC under different loading rates.

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“…Through parameter analysis, the mechanical characteristics differences between the curved box girder with corrugated steel web and the continuous box girder with concrete were studied. Hu Shaojie 17 used the large‐scale finite element program ANSYS Workbench to establish a spatial finite element model of the sliding bearing and slide rail on the Furong Road Bridge over the Guangzhou‐Shenzhen‐Hong Kong high‐speed railway and optimized the design of the slide rail and slide bearing. The mechanical characteristics of the steel cover beam and other components were studied using the finite element software Midas Civil for stress, deflection, and stability.…”

Section: Introductionmentioning

confidence: 99%

Simulation and analysis of mechanical properties of complex steel cover beam under static load

2023

Adv Control Appl

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In recent years, the development of high‐speed railways in China has been rapid. High‐speed railway bridges play an essential role whenever the railway intersects with existing facilities in three dimensions. With the increasing speed of high‐speed railways and increasingly complex geographical locations, the span of bridges is constantly increasing. Based on their advantages, steel structures in large‐span bridges are beginning to replace traditional concrete structures. Taking the steel cover beam technology applied in the Fuqiangbao Tremendous Bridge as a starting point, this paper uses Rhino parameterized modeling and Abaqus software to conduct finite element analysis on the stress of steel cover beams. It compares and analyzes stress under different conditions. The results show that the steel cover beam's most unfavorable and unstable position in this paper is at the support on the stress side. This provides a reference for monitoring the steel cover beam after its application in the Fuqiangbao Tremendous Bridge and technical accumulation for the application of steel cover beam technology.

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Dynamic Mechanical Properties of EPS Concrete Under Impact Loading

Cited by 9 publications

References 9 publications

Review of Underwater Anechoic Coating Technology Under Hydrostatic Pressure

Review of Underwater Anechoic Coating Technology Under Hydrostatic Pressure

Experimental Investigation of the Size Effect on Roller-Compacted Hydraulic Asphalt Concrete under Different Strain Rates of Loading

Simulation and analysis of mechanical properties of complex steel cover beam under static load

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