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Comparison of Cushioning Mechanisms between Cellular Glass and Gabions Subjected to Successive Boulder Impacts
Ng, CWW1; Su, Y1,2; Choi, CE3; Song, D4; Lam, C5; Kwan, JSH5; Chen, R6; Liu, H1
Corresponding AuthorChoi, CE
2018
Source PublicationJOURNAL OF GEOTECHNICAL AND GEOENVIRONMENTAL ENGINEERING
ISSN1090-0241
EISSN1943-5606
Volume144Issue:8Pages:4018058
SubtypeArticle
Contribution Rank4
AbstractGabions are the most commonly adopted cushion layer for shielding rigid debris-resisting barriers against boulder impact. Despite the prevalent use of gabions, they comprise heavy rock fragments that are not easily transported up steep natural terrain. The advent of using light-weight cellular glass as an alternative cushion layer provides an innovative approach for absorbing impact energy. However, a lack of insight on their load attenuation characteristics has hindered its potential implementation. In this study, cellular glass was subjected to successive impacts to replicate the dynamic loading of boulders by using a large-scale pendulum setup. Results reveal that for a single impact at 70kJ, crushing exhibited by cellular glass leads to 25% lower impact force compared to gabions, which rely predominantly on rock fragment rearrangement to absorb energy. However, gabions exhibit more effective load spreading, with a diffusion angle three times greater than cellular glass. To ensure robust designs for cellular glass, the Johnson's damage number is proposed to quantify the plastic deformation and to improve estimates of the cushioning efficiency represented by the load-reduction factor (Kc) used in current design.
KeywordDebris flow Boulder impact Crushable foam Large nonlinear finite-element modeling Johnson's damage number Dn Load-reduction factor Kc
DOI10.1061/(ASCE)GT.1943-5606.0001922
Indexed BySCI
Language英语
WOS IDWOS:000438693000004
Citation statistics
Cited Times:7[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imde.ac.cn/handle/131551/23467
Collection山地灾害与地表过程重点实验室
Affiliation1.Hong Kong Univ Sci & Technol, Dept Civil & Environm Engn, Kowloon 999077, Hong Kong, Peoples R China;
2.JSTI Grp, 8 East Fuchunjiang Rd, Nanjing 210017, Jiangsu, Peoples R China;
3.Hong Kong Univ Sci & Technol, Dept Civil & Environm Engn, HKUST Jockey Club Inst Adv Study, Kowloon 999077, Hong Kong, Peoples R China;
4.Chinese Acad Sci, Inst Mt Hazards & Environm, Key Lab Mt Hazards & Earth Surface Proc, 9,Block 4, Chengdu 610041, Sichuan, Peoples R China;
5.Govt Hong Kong Special Adm Reg, Geotech Engn Off, Civil Engn & Dev Dept, 101 Princess Margaret Rd, Kowloon 999077, Hong Kong, Peoples R China;
6.Harbin Inst Technol, Dept Civil & Environm Engn, HIT Campus Univ Town Shenzhen, Shenzhen 518055, Peoples R China
Recommended Citation
GB/T 7714
Ng, CWW,Su, Y,Choi, CE,et al. Comparison of Cushioning Mechanisms between Cellular Glass and Gabions Subjected to Successive Boulder Impacts[J]. JOURNAL OF GEOTECHNICAL AND GEOENVIRONMENTAL ENGINEERING,2018,144(8):4018058.
APA Ng, CWW.,Su, Y.,Choi, CE.,Song, D.,Lam, C.,...&Liu, H.(2018).Comparison of Cushioning Mechanisms between Cellular Glass and Gabions Subjected to Successive Boulder Impacts.JOURNAL OF GEOTECHNICAL AND GEOENVIRONMENTAL ENGINEERING,144(8),4018058.
MLA Ng, CWW,et al."Comparison of Cushioning Mechanisms between Cellular Glass and Gabions Subjected to Successive Boulder Impacts".JOURNAL OF GEOTECHNICAL AND GEOENVIRONMENTAL ENGINEERING 144.8(2018):4018058.
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