Mechanical properties and dynamic constitutive relation of lightweight shale ceramsite concrete

Wu, Xiaogang; Wang, Shuren; Yang, Jinbao; Zhu, Sen; Kodama, Junichi

doi:10.1080/19648189.2020.1782772

Cited by 11 publications

(11 citation statements)

References 20 publications

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“…From Xu et al (2012), the Walravan aggregate grading curve in the two-dimensional plane is: is the probability of particles in the cross-section having a diameter smaller than the sieve opening 0 D ; max D is the maximum diameter of the aggregate; k P represents the percentage of the volume of coarse and fine aggregates in the concrete test specimen to the total volume, estimated based on Wu et al (2020a) and set to 0.78. The coarse aggregate particle sizes in this study ranged from 5 to 15 mm.…”

Section: Generation Of Mesh-based 2d Random Aggregate Modelmentioning

confidence: 99%

“…Referring to Wu et al (2020a), the aggregates were modeled as polygons. The method for generating polygonal aggregates used in this study available in the literature (Wu et al 2022b;Wang et al 1999).…”

Section: Generation Of Mesh-based 2d Random Aggregate Modelmentioning

confidence: 99%

“…With the continuous societal development, an increasing number of engineering projects are being built in cold regions, and concrete is being widely used in these projects. LWAC is an excellent building material for cold regions (Wu et al 2020a). The dynamic mechanical properties of LWAC in cold regions are important for the safety and reliability of buildings under impact loads.…”

Section: Introductionmentioning

confidence: 99%

“…Similarly, Wang et al (2022) conducted impact experiments on concrete using SHPB in the temperature range of −15°C to 20°C and found that the peak strain of concrete linearly decreased with increasing temperature, but the impact resistance continuously increased as the temperature decreased. Wu et al (2020a) conducted dynamic compression experiments on LWAC in the temperature range of −30°C to 20°C and found that LWAC exhibited a significant strain rate effect in low temperature environments.…”

Section: Introductionmentioning

confidence: 99%

“…At the microscale, concrete is typically regarded as a three-phase composite material composed of aggregate, mortar matrix, and interface transition zone (ITZ) phases. The random aggregate model constructed on this basis has been applied by domestic and foreign scholars in quasi-static and dynamic numerical simulations and has achieved significant research results (Xu et al 2012;Huang et al 2016;Jin et al 2020;Yu et al 2021b;Wu et al 2020a). This study used a random aggregate model, and numerical simulation research was conducted on the dynamic mechanical properties of LWAC at low temperatures (−30°C, −20°C).…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Numerical Analysis of Impact Compression Failure and Dynamic Mechanical Behavior of Lightweight Aggregate Concrete at Low Temperatures

Duan,

Zhu,

et al. 2023

ACT

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Lightweight aggregate concrete (LWAC) is often used in building structures in these cold regions, which may also bear impact loads. To investigate the dynamic mechanical behavior of LWAC at low temperatures, this study conducted numerical simulations of the split Hopkinson pressure bar impact experiment on LWAC at room and low temperatures. The numerical simulation results showed good agreement with the experimental results, and on this basis, the dynamic failure process and characteristics of LWAC at different temperatures were analyzed. The numerical simulation results showed that both strain rates and temperatures have significant effects on the dynamic failure behavior of LWAC, and as the strain rate increases, more cracks are produced in LWAC during failure; as the temperature decreases, more cracks appear in the mortar matrix owing to the gradual decrease in the strength difference between the mortar matrix and the aggregate phase. In addition, both decreasing the temperature and increasing the strain rate enhance the strength of LWAC; a low temperature enhances the impact toughness of concrete at 60 s -1 and 80 s -1 but weakens it at 100 s -1 . This study can be used as a theoretical reference for the safety and protection design of LWAC in low-temperature environments.

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Section: Generation Of Mesh-based 2d Random Aggregate Modelmentioning

confidence: 99%