Open AccessMesoscopic Simulation Method for Uniaxial Compression Test of RCC Dam Material Based on DEM
Author(s) -
Zilong Li,
Yang Tang
Publication year - 2020
Publication title -
mathematical problems in engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.262
H-Index - 62
eISSN - 1026-7077
pISSN - 1024-123X
DOI - 10.1155/2020/6686609
Subject(s) - mesoscopic physics , adaptability , consistency (knowledge bases) , roller compacted concrete , proctor compaction test , compression test , structural engineering , finite element method , discrete element method , compaction , computer science , hammer , geotechnical engineering , compression (physics) , engineering , materials science , mechanics , composite material , physics , artificial intelligence , biology , ecology , quantum mechanics , cement
The roller compacted concrete (RCC) dam has become one of the most competitive dam types due to its fast construction speed, low cost, and strong adaptability. However, the macroscale compaction test can hardly reflect the mesoscopic structure on the RCC’s rolling characteristics. According to the characteristics of RCC dam materials, a numerical discrete element method (DEM) is proposed in this paper, which is used to simulate the irregular shape and proportion of RCC aggregates. Moreover, a mesoscopic parameter inversion method based on the adaptive differential evolution (ADE) algorithm is proposed to enhance the efficiency of model contact parameters determination and overcome the inconvenience and time-consumption of conventional methods. Compared with the physical test, the simulation compression curve has good consistency with the physical test curve, and the proposed method can adequately reflect the physical and mechanical properties of RCC dam materials, which provides a basis for the subsequent research on the properties of RCC dam materials under different filling times.