Item: COMPRESSIVE STRENGTH OF COMPACTED MACHINE-MADE SNOW
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Title: COMPRESSIVE STRENGTH OF COMPACTED MACHINE-MADE SNOW
Proceedings: International Snow Science Workshop Proceedings 2023, Bend, Oregon
Authors:
- Yuanpeng Zheng [ Key Laboratory of Performance Evolution and Control for Engineering Structures (Ministry of Education), Tongji University, Shanghai, China ] [ Department of Structural Engineering, Tongji University, Shanghai, China ]
- Chenxi Han [ College of Civil Engineering, Tongji University, Shanghai, China ]
- Mengxuan Zeng [ Key Laboratory of Performance Evolution and Control for Engineering Structures (Ministry of Education), Tongji University, Shanghai, China ] [ Department of Structural Engineering, Tongji University, Shanghai, China ]
- Tao Chen [ Key Laboratory of Performance Evolution and Control for Engineering Structures (Ministry of Education), Tongji University, Shanghai, China ] [ Department of Structural Engineering, Tongji University, Shanghai, China ]
- Xianglin Gu [ Key Laboratory of Performance Evolution and Control for Engineering Structures (Ministry of Education), Tongji University, Shanghai, China ] [ Department of Structural Engineering, Tongji University, Shanghai, China ]
- Gang Qiao [ College of Surveying and Geo-Informatics, Tongji University, Shanghai, China ]
Date: 2023-10-08
Abstract: Compacted snow holds a significant role in both structural engineering and terramechanics in cold regions. Machine-made snow makes indoor snow-related mechanical experiments possible throughout the year, fostering the pace of engineering research. This paper presents an experimental program to investigate the uniaxial compressive behavior of compacted machine-made snow. Machine-made snow was produced in different air temperatures into two types – wet snow and dry snow - and snow cylinders were fabricated to different densities, from 450 kg/m3 via a layer-by-layer filling technique to over 700 kg/m3 by ramming, showing an ice-like appearance. Four compressive loading rates (1 mm/min, 10 mm/min, 25 mm/min and 100 mm/min), covering both ductile and brittle failure regimes, were mainly investigated in the experimental program with a temperature of -10°C. The tested specimens featured a two-stage growing trend of compressive stress under significant deformation at the loading rate of 1 mm/min. In contrast, higher compressive loading rates shifted the specimen behavior towards brittleness with more uncertainty and diverse failure modes, as demonstrated by some load-displacement curves that display a zig-zag fashion. To better characterize the mechanical behavior of snow for engineering analysis and construction, new definitions of compressive strength and modulus are proposed and the values are calculated. The compressive strength of snow shows an increasing relationship with snow density, especially when the density is close to 700 kg/m3. Additionally, some phenomena in the experiment are discussed including the non-linearity at the initial stage of compression and the ductility differences between wet and dry snow.
Object ID: ISSW2023_P3.31.pdf
Language of Article: English
Presenter(s): Yuanpeng Zheng
Keywords: machine-made snow, compressive behavior, compressive strength, compressive modulus, failure modes
Page Number(s): 1416 - 1423
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