IMHE OpenIR  > 山地灾害与地表过程重点实验室
The Impact Force of Boulders conveyed in Debris Flows on Bridge Piers and its Anti-collision Measures
Quancai Wang1; Jian Chen1,2; Hao Wang3; Qunli Zhang4
Corresponding AuthorJian Chen
2016-04
Source PublicationInternational Journal of Geohazards and Environment
ISSN2368-5905
Volume2Issue:2Pages:72-81
Abstract

It is quite common in highway engineering that building a bridge across a debris flow gully to prevent roadbed from damage by strike of debris flows. As bridges are designed with the purpose of protection to their piers against debris flows, it is crucially important for engineers in determining the magnitude of the Impact Force Exerted by Boulders Transported (IFEBT) in rush torrents. In view of the theory of energy conservation, a formula was introduced in this paper to calculate the IFEBT with appreciable improvement as compared to the common equations, in which either cantilever structures or simply supported structures, only the two types of structures were taken into account in modelling. The Thornton elastoplastic contact criterion was included in the formula in consideration of buffer effect of two-phase debris flow on bridge piers and dynamic responses of bridge upper-structure. Comparisons on calculation accuracy were elaborately made between our improved formula and the used one by a case study of Den Jigou Bridge. It was found that according to our proposed method the values of IFEBT obtained in circumstances of varied velocity and sizes of boulders were lower than the ones gained by the used methods. Furthermore, providing the depth of debris flow body in the two-phase condition were up to 2.4cm, there were a considerable decrease of 21% in the value of IFEBT. In the meantime, a decrease of 1.4% in the IFEBT value was attained in consideration of the action of inertia force of the upper-structure of bridges. In addition, it is feasible to dissipate impact energy of IFEBT when low elasticity modulus and high decrement material were used in practical engineering.

KeywordDebris Flow Impact Force Exerted By Boulders Transported (Ifebt) Bridge Pier Energy Dissipation
Subject Area工程与技术科学基础学科其他学科
Indexed By其他
Language英语
TOP
Document Type期刊论文
Identifierhttp://ir.imde.ac.cn/handle/131551/18360
Collection山地灾害与地表过程重点实验室
Affiliation1.Key laboratory of Mountain Hazards and Earth Surface Process, Chinese Academy of Sciences, Chengdu, China/Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu, China
2.University of Chinese Academy of Sciences, Beijing, China
3.School of Civil Eng. and Architecture, Henan University, Kaifeng, China
4.School of Water Resources & Environmental Eng., East China University of Technology, Nanchang, China
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
Quancai Wang,Jian Chen,Hao Wang,et al. The Impact Force of Boulders conveyed in Debris Flows on Bridge Piers and its Anti-collision Measures[J]. International Journal of Geohazards and Environment,2016,2(2):72-81.
APA Quancai Wang,Jian Chen,Hao Wang,&Qunli Zhang.(2016).The Impact Force of Boulders conveyed in Debris Flows on Bridge Piers and its Anti-collision Measures.International Journal of Geohazards and Environment,2(2),72-81.
MLA Quancai Wang,et al."The Impact Force of Boulders conveyed in Debris Flows on Bridge Piers and its Anti-collision Measures".International Journal of Geohazards and Environment 2.2(2016):72-81.
Files in This Item:
File Name/Size DocType Version Access License
Impact Force of Boul(258KB)期刊论文作者接受稿开放获取CC BY-NC-SAView Application Full Text
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Quancai Wang]'s Articles
[Jian Chen]'s Articles
[Hao Wang]'s Articles
Baidu academic
Similar articles in Baidu academic
[Quancai Wang]'s Articles
[Jian Chen]'s Articles
[Hao Wang]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Quancai Wang]'s Articles
[Jian Chen]'s Articles
[Hao Wang]'s Articles
Terms of Use
No data!
Social Bookmark/Share
File name: Impact Force of Boulders Conveyed in Debris Flows on Bridge Piers and Collision Protection Measures_Wang Quancai.pdf
Format: Adobe PDF
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.