IMHE OpenIR  > 山地灾害与地表过程重点实验室
Alternative TitleStudy on elliptic anti rock-fall impact structure with double energy dissipation layers wrapping up pier eccentrically in mountains
吴永1,2; 何思明1,2; 李新坡1,2; 欧阳朝军1,2; 姜元俊1,2; 王东坡3
Corresponding Author吴永
Source Publication工程力学
Other Abstract



 The pier of common bridge in mountain areas can be easily damaged under rock-fall impact due to its high stiffness. However, there is lack of effective measures to protect it. Based on the study of elastic-plastic mechanism of rock-fall impact on pier, and according to energy dissipation theory, an elliptic structure with two cavities filled with aluminum foam is proposed. By combining the MTS test resutls, the dynamic response and optimized design of the new structure is analyzed by dynamic finite element method. The results show the elliptic structure wrapping up pier eccentrically can weak impact efficiently and enhance system safety economically. Meanwhile, the thicker aluminum foam layer would dissipate more impact energy. However, when the layer is too thick, large rigidity of structure is induced. In addition, among the different filled modes, the structure with a thin outer layer and filled with large intensity aluminum foam can control plastic deformation and pier deflection very well. The new structure can keep the safety by weakening the impaction and dissipating energy significantly. 

Keyword滚石 桥墩偏心防护 双腔椭圆结构 冲击模型 泡沫铝
Subject AreaU443.22
Indexed ByEI ; CSCD ; 北大中文核心
Accession numberAccession number: 20174604408784
Citation statistics
Document Type期刊论文
First Author Affilication中国科学院水利部成都山地灾害与环境研究所
Recommended Citation
GB/T 7714
吴永,何思明,李新坡,等. 山区桥墩抗滚石冲击的双腔椭圆偏心包裹结构研究[J]. 工程力学,2017,34(10):158-167.
APA 吴永,何思明,李新坡,欧阳朝军,姜元俊,&王东坡.(2017).山区桥墩抗滚石冲击的双腔椭圆偏心包裹结构研究.工程力学,34(10),158-167.
MLA 吴永,et al."山区桥墩抗滚石冲击的双腔椭圆偏心包裹结构研究".工程力学 34.10(2017):158-167.
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