TESTS AND NUMERICAL SIMULATION OF SIDE PRESSURE ON SILO WALLS BY STORAGE MATERIALS

WU Chengxia; XU Zhijun; PANG Zhaokun; YUAN Fang; JIANG Xuejia

doi:10.13204/j.gyjzG20041307

Volume 51 Issue 8

Nov. 2021

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WU Chengxia, XU Zhijun, PANG Zhaokun, YUAN Fang, JIANG Xuejia. TESTS AND NUMERICAL SIMULATION OF SIDE PRESSURE ON SILO WALLS BY STORAGE MATERIALS[J]. INDUSTRIAL CONSTRUCTION, 2021, 51(8): 68-73. doi: 10.13204/j.gyjzG20041307

Citation:

WU Chengxia, XU Zhijun, PANG Zhaokun, YUAN Fang, JIANG Xuejia. TESTS AND NUMERICAL SIMULATION OF SIDE PRESSURE ON SILO WALLS BY STORAGE MATERIALS[J]. INDUSTRIAL CONSTRUCTION, 2021, 51(8): 68-73. doi: 10.13204/j.gyjzG20041307

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TESTS AND NUMERICAL SIMULATION OF SIDE PRESSURE ON SILO WALLS BY STORAGE MATERIALS

doi: 10.13204/j.gyjzG20041307

1. Construction Engineering College, Guangzhou City Construction College, Guangzhou 510925, China;
2. Civil Engineering College, Henan University of Technology, Zhengzhou 450001, China

Received Date: 2020-04-13
Available Online: 2021-11-10
Publish Date: 2021-11-10

Abstract

Abstract

The dynamic pressure of silo discharging is the main cause of silo wall failure, and the type of storage material were is an important factor affecting dynamic pressure. The silo discharging tests were conducted on the silos infilled with three kinds of storage materials: soybean, wheat and sand. Based on the test, a numerical simulation model of grain flow during discharging was established.The dynamic side pressures and overpressure coefficients of different storage materials during discharging process were compared to explore the influence law of different storage materials on dynamic pressure.The results showed that:1) The maximum overpressure coefficients of the three kinds of storage materials were 2.27, 1.52 and 1.24 respectively, located near 1/3 of the silo height. 2) The falling speed of the silo side wall was less than that of the middle part of the silo, because the dense force chain network on the silo wall inhibited the flow of the storage material near the silo wall and led to the increase of side pressure. 3) By observing the particle force chain network, it was found that the contact forces were concentrated near the silo wall, and it was sparse at the middle part of silo, presenting the form of dynamic arch. The contact force of arch foot was used for the silo wall, which was the main reason for the increase of dynamic pressure.
- silo,
- dynamic pressure,
- static pressure,
- force chain network

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References(16)

References

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