Abstract：Research purposes:The flexible shield is a passive protective structure for slopes to intercept falling rock. With the characteristics of convenient construction, economical cost and environmental protection, the flexible shield structure is widely used in the rockfall disaster protection field. However, there are no codes to guide the design of the flexible shield structure. In this paper, three models such as the failure model of the flexible shield structure under rock impact are established based on energy method, Sobol' global analysis method is used to obtain the first-order sensitivity and global sensitivity of the flexible shield structure parameters, and an optimal design idea of the flexible shield structure is proposed. Research conclusions:(1) The same parameter has different sensitive degrees in different calculation models; (2) The interaction between the parameters is obvious, and the global sensitivity of all parameters in the three models increases in different degrees compared with the first-order sensitivity; (3) In the flexible shield structure failure model, the smaller adjustment of high sensitivity parameters including the limit distance of falling rock and the equivalent cross-sectional area of cable can make the structure meet the design requirements and minimize the increase of steel consumption; (4) The research results can be used in the optimal design of the flexible shield structure, making structure design more economical.
唐建辉, 周晓军, 蒋敦荣, 等. 落石冲击大跨度拱形明洞结构作用机理研究[J]. 铁道工程学报, 2019(11):62-66.Tang Jianhui, Zhou Xiaojun, Jiang Dunrong, etc. Research on the Action Mechanism of Rockfall Impacting Large Span Arched Open Cut Tunnel Structure[J]. Journal of Railway Engineering Society, 2019(11):62-66.
[2]
Liu Chengqing, Wei Xiaodan, Lu Zheng, etc. Studies on Passive Flexible Protection to Resist Landslides Caused by the May 12, 2008, Wenchuan Earthquake[J]. The Structural Design of Tall and Special Buildings, 2017(11):e1372.1-e1372.11.
[3]
Yang Jingjin, Duan Suli, Li Qinfeng, etc. A Review of Flexible Protection in Rockfall Protection[J]. Natural Hazards, 2019(1):71-89.
[4]
刘成清, 倪向勇, 杨万理, 等. 基于能量法的被动柔性棚洞防护结构设计理[J]. 工程力学, 2016(11):95-104.Liu Chengqing, Ni Xiangyong, Yang Wanli, etc. Design Theory for Passive Flexible Shield Structures Based on Energy Method[J]. Engineering Mechanics, 2016(11):95-104.
[5]
李睿. Sobol’灵敏度分析方法在结构动态特性分析中的应用研究[D]. 长沙:湖南大学, 2003.Li Rui. Application of Sobol’ Sensitivity Analysis Method in the Analysis of Structural Dynamic Characteristics[D]. Changsha:Hunan University, 2003.
[6]
王智猛, 褚宇光, 魏永幸. 高速铁路防异物入侵半刚性防护网技术[C]//中国铁道学会铁道工程学会工程地质与路基专业委员会第二十三届年会论文集.成都:西南交通大学学报,2012:280-285.Wang Zhimeng, Chu Yuguang, Wei Yongxing. Semi-Rigid Protective Net Technology for Foreign Body Intrusion in High Speed Railway[C]//Proceedings of the 23rd Annual Meeting of Engineering Geology and Subgrade Professional Committee of Railway Engineering Society of China Railway Society. Chengdu:Journal of Southwest Jiaotong University, 2012:280-285.
[7]
日本道路協会. 落石対策便覧[M]. 日本:丸善株出版事業部, 1983:156-157.Japan Road Association. Brief Guide for Countermeasure of Rockfall[M]. Japan:Maruzen Publishing Division, 1983:156-157.
[8]
Sobol’ I M. Global Sensitivity Indices for Nonlinear Mathematical Models and Their Monte Carlo Estimates[J]. Mathematics and Computers in Simulation, 2001(1/2/3):271-280.
2022, Vol. 39 
版权所有 © 2014 《铁道工程学报》编辑部