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Numerical simulation of energy dissipation mechanism on falling rocks protection nets(PDF)

长安大学学报（自然科学版）[ISSN:1006-6977/CN:61-1281/TN]

Issue:
2012年06期
Page:
59-66
Research Field:
Publishing date:

Info

Title:
Numerical simulation of energy dissipation mechanism on falling rocks protection nets
Author(s):
ZHOU Xiao-yu; CHEN Ai-rong; MA Ru-jin
School of Civil Engineering, Tongji University, Shanghai 200092, China
Keywords:
bridge engineering;  rockfall;  numerical simulation;  energy dissipation mechanism;  flexible protection net;  bullet effect
PACS:
U417.12
DOI:
-
Abstract:
Based on the method of dynamic finite element analysis, Rockfall was used to simulate the rockfall trajectory at a slope of Lancang River in Yunnan province, China. The obtained rockfall motion characteristics were introduced to analyze the dynamic response of the flexible protection nets with the Ls-dyna. The results show that the motion characteristics of falling rocks are related with the form and surface layer characteristics of slope, but their relation with falling rocks mass is not obvious. The maximum deformation, the maximum impact force and the contact time are strongly correlated with the impact velocity and the dimensions of rocks. At the same time, the so-called “bullet effect” is accurately verified. A small rock needs less kinetic energy than the relatively large rocks when it penetrates the rockfull protection nets. 1 tab, 15 figs, 12 refs.

References:

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Last Update: 2012-12-30