|Table of Contents|

Dynamic analysis of rock-fall impact on shed tunnel structure

《交通运输工程学报》[ISSN:1671-1637/CN:61-1369/U]

Issue:
2012年01期
Page:
25-30
Research Field:
道路与铁道工程
Publishing date:

Info

Title:
Dynamic analysis of rock-fall impact on shed tunnel structure
Author(s):
YANG Lu1; 2; LI Shi-min2; WU Zhi-min1; SHEN Xin-pu2
1.School of Civil Engineering,Dalian University of Technology,Dalian 116023,Liaoning,China; 2.School of Architecture and Civil Engineering,Shenyang University of Technology, Shenyang 110870,Liaoning,China
Keywords:
shed tunnel structure;  roll-fall;  concrete protective structure;  impact energy;  ABAQUS finite element
PACS:
TU375;TU311
DOI:
-
Abstract:
Shed tunnel structure was taken as prototype,and the contact force,displacement,damage,and energy of shed tunnel under rock-fall impact were studied.Rock-fall was simplified to rigid sphere,surrounding rock and soil were reduced to ideal elastic materials,and concrete was regarded as elastic-plastic material.The dynamic responses of rock-fall impact on shed tunnel structure at different speeds and incident angles were simulated by using ABAQUS finite element.Analysis result shows that when incident angle is unchanged,the greater rock-fall speed is,the greater the displacement is.When rock-fall speed is constant,the smaller rock-fall incident angle is,the greater the displacement is.The worst damage of concrete protective structure occurs at rock-fall contact area,the second damages are inclined leg pillar top and beam in connection with pillar,and the intensities of pillar top and beam joint should be strengthened in practical projects.Impact energy is mainly absorbed and consumed through the concrete protective structure of shed tunnel,the absorption and consumption of soil cushion layer are very limited.To alleviate the damage of rock-fall impact on the concrete protective structure,energy shock absorber can be added at shed tunnel bearing place.

References:

[1] BRIZMER V, KLIGERMAN Y, ETSION I. The effect of contact conditions and material properties on the elasticity terminus of a spherical contact[J]. International Journal of Solids and Structures, 2006, 43(18/19): 5736-5749.
[2] WU Cheng-qing, HAO Hong. Numerical simulation of structural response and damage to simultaneous ground shock and airblast loads[J]. International Journal of Impact Engineering, 2007, 34(3): 556-572.
[3] KAWAHARA S, MURO T. Effects of dry density and thickness of sandy soil on impact response due to rock-fall[J]. Journal of Terramechanics, 2006, 43(3): 329-340.
[4] PICHLER B, HELLMICH C, MANG H A. Impact of rocks onto gravel design and evaluation of experiments[J]. International Journal of Impact Engineering, 2005, 31(5): 559-578.
[5] OLSSON R. Analytical prediction of large mass impact damage in composite laminates[J]. Composites Part A: Applied Science and Manufacturing, 2001, 32(9): 1207-1215.
[6] 蒋树屏,刘元雪,黄伦海,等.环保型傍山隧道结构研究[J].中国公路学报,2006,19(1):80-83,103.JIANG Shu-ping, LIU Yuan-xue, HUANG Lun-hai, et al. Research on environmental friendly structure of tunnel adjacent to mountain[J]. China Journal of Highway and Transport, 2006, 19(1): 80-83, 103.(in Chinese)
[7] 杨 璐,陈玳珩,沈新普,等.高速公路防护栏支柱的水平基床反力[J].沈阳工业大学学报,2010,32(1):115-120.YANG Lu, CHEN Dai-heng, SHEN Xin-pu, et al. Horizontal subgrade reaction of highway guardrail column[J]. Journal of Shenyang University of Technology, 2010, 32(1): 115-120.(in Chinese)
[8] ZHENG Hong, GE Xiu-run, CAI Zhuo-fen. Crispy plastic rock analysis theory and its application[J]. Journal of Rock Mechanics and Engineering, 1997, 16(1): 8-21.
[9] 何思明,吴 永.新型耗能减震滚石棚洞作用机制研究[J].岩石力学与工程学报,2010,29(5):926-932.HE Si-ming, WU Yong. Research on cushioning mechanism of new-typed energy dissipative rock shed[J]. Chinese Journal of Rock Mechanics and Engineering, 2010, 29(5): 926-932.(in Chinese)
[10] 高 干,刘元雪,周家伍,等.新型棚洞结构抗震效应研究[J].后勤工程学院学报,2009,25(6):11-16,45.GAO Gan, LIU Yuan-xue, ZHOU Jia-wu, et al. Earthquake resistance effect research in the new shed-tunnel structure[J]. Journal of Logistical Engineering University, 2009, 25(6): 11-16, 45.(in Chinese)
[11] 何思明,沈 均,吴 永.滚石冲击荷载下棚洞结构动力响应[J].岩土力学,2011,32(3):781-788.HE Si-ming, SHEN Jun, WU Yong. Rock shed dynamic response to impact of rock-fall[J]. Rock and Soil Mechanics,2011, 32(3): 781-788.(in Chinese)
[12] REDDISH D J, STACE L R, VANICHKOBCHINDA P. Numerical simulation of the dynamic impact breakage testing of rock[J]. International Journal of Rock Mechanics and Mining Sciences, 2005, 42(2): 167-176.
[13] STRONGE W J, ASHCROFT A D C. Oblique impact of inflated balls at large deflections[J]. International Journal of Impact Engineering, 2007, 34(6): 1003-1019.

Memo

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Last Update: 2012-02-28