编号：CDUT-2023-19

标题：Application of EPS geofoam in rockfall galleries: Insights from large-scale experiments and FDEM simulations

入藏号：WOS:000807716800001

中国科学院文献情报中心期刊分区：地球科学1区/TOP（2022）

本校作者：闫帅星；王东坡

来源出版物：GEOTEXTILES AND GEOMEMBRANES  卷: 50  期: 4  页: 677-693

出版年：2022

第一地址： 成都理工大学

关键词： Rockfall gallery; EPS-Based cushion; Structural response; Impact test; FDEM simulation

代表图：     

                                                                                                       摘要：Expanded polystyrene (EPS) geofoam presents a promising application in the protection of galleries against rockfall. This paper focuses on experimental and numerical studies that aim to more effectively characterise the impact kinematics between single-block rockfalls and galleries with homogeneous sand and EPS, as well as the EPS-sand composite cushion system. The compression, tensile, and shear properties of EPS are firstly recognised with mathematical descriptions. Then, large-scale experiments considering the rock block mass and velocity help illustrate the general features of impact processes, and quantify the structural dynamic responses as well as the energy dissipation of the cushioning. Finally, the combined finite and discrete element method (FDEM) is first adopted to simulate the combined failure modes of EPS subjected to impact. The numerical model is well verified and exhibits great predictability in the contribution of different materials in the composite cushion system to energy dissipation. The results demonstrate the effective impact resistance of the EPS-sand cushioning. Additionally, they engender an extended methodology for analysing more EPS-based composite cushion systems applied in rockfall galleries.

文章链接地址: https://www.sciencedirect.com/science/article/pii/S026611442200036X?via%3Dihub