›› 2017, Vol. 38 ›› Issue (2): 583-592.doi: 10.16285/j.rsm.2017.02.035

• 数值分析 • 上一篇    下一篇

地震条件下危岩崩塌运动特性的初步探讨

黄小福1, 2,张迎宾1, 3,赵兴权1,余鹏程1,邢 昊1,张 珏1,陈岩岩1   

  1. 1. 西南交通大学 土木工程学院,四川 成都 610031;2. 中铁隧道集团有限公司勘测设计研究院,广东 广州 510000; 3. 九州大学 土木与建筑工程学院,日本 福冈 819-0395
  • 收稿日期:2015-02-27 出版日期:2017-02-11 发布日期:2018-06-05
  • 通讯作者: 张迎宾,男,1983年生,博士,副教授,主要从事地震岩土工程及非连续数值方法研究。E-mail:yingbinz516@126.com E-mail:xiaofuh021@163.com
  • 作者简介:黄小福,男,1990年生,硕士,主要从事岩土工程抗震方面的研究工作。
  • 基金资助:

    国家自然科学基金(No. 51408511,No. 41672286);日本学术振兴会特别研究员奖励费(No. 16F16056);中央高校基本科研业务费专项资金资助(No. 2682014RC19,No. 2682015CX080,No. 2682016CY11)

A preliminary study of kinetic characteristic of rock-fall under seismic loading

HUANG Xiao-fu1, 2, ZHANG Ying-bin1, 3, ZHAO Xing-quan1, YU Peng-cheng1, XING Hao1, ZHANG Jue1, CHEN Yan-yan1   

  1. 1.School of Civil Engineering, Southwest Jiaotong University, Chengdu, Sichuan 610031, China; 2. Survey, Design and Research Institute of China Railway Tunnel Group Co., Ltd., Guangzhou, Guangdong 510000, China; 3. Department of Civil and Structure Engineering, Kyushu University, Fukuoka 819-0395, Japan
  • Received:2015-02-27 Online:2017-02-11 Published:2018-06-05
  • Supported by:

    This work was supported by the National Natural Science Foundation of China (51408511, 41672286), the JSPS KAKENHI Grant Number JP (16F16056) and the Fundamental Research Funds for the Central Universities (2682014RC19, 2682015CX080, 2682016CY11).

摘要: 危岩崩塌是一种常见且破坏性极大的地质灾害,而地震是导致危岩崩塌的主要因素之一。数值模拟是研究危岩崩塌的重要手段。以概念危岩为例,运用非连续变形分析(DDA)法研究了地震荷载对危岩体崩塌块体运动特性的影响。对无地震荷载和3种不同地震荷载输入方式的4种工况进行了模拟。研究结果表明:地震荷载对危岩崩塌破坏有促进作用,不同的地震荷载输入方式对崩塌块体的运动特性有着显著的差异。从算例来看,竖向地震动对崩塌块体运动距离的影响程度甚至比水平地震动对其的影响程度更大,这与人们的传统观念不同,在今后的地震危岩崩塌防治措施设计中,应对竖向地震荷载给予足够的重视。

关键词: 危岩崩塌, 地震荷载, 非连续变形分析(DDA), 运动距离, 竖向地震动

Abstract: As is well-known, rock-fall is one of the most common geo-hazards and always causes serious damage to both lives and properties. There are many triggering factors that give rise to the occurrence of rock-fall disaster and earthquake is one of the main triggers, while often leading to a greater loss than other factors. As one of the methods to carry out researches of rock-fall, numerical simulation plays an important role in the study of movement characteristics. A conceptual rock-fall model with four cases, one without seismic loading and three with different seismic loading input modes, is used to simulate the effect of seismic loadings on the mobility characteristics by discontinuous deformation analysis (DDA). The simulation results show that the seismic loading prompts the collapse of potential rock-fall and different seismic loading input modes have different significant influences on the mobility characteristics of the collapse block. Another important conclusion is the vertical component of seismic loading has more significant influence on the movement distance of collapse block than the horizontal component, which differs from the traditional knowledge about the earthquake-induced rock-fall. Thus the vertical seismic loading should be given enough attention in the future prevention design of earthquake-induced rock-fall.

Key words: rock-fall, seismic loading, discontinuous deformation analysis (DDA), movement distance, vertical ground motion

中图分类号: 

  • TU 457

[1] 郑光, 许强, 彭双麒. 岩质滑坡−碎屑流的运动距离计算公式研究[J]. 岩土力学, 2019, 40(12): 4897-4906.
[2] 代仲海,胡再强,尹小涛,吴振君,. 工程荷载作用下缓倾角反倾似层状岩质边坡变形稳定性分析[J]. , 2018, 39(S1): 412-418.
[3] 唐 然,许 强,吴 斌,范宣梅,. 平推式滑坡运动距离计算模型[J]. , 2018, 39(3): 1009-1019.
[4] 刘泉声,蒋亚龙,何 军. 非连续变形分析的精度改进方法及研究趋势[J]. , 2017, 38(6): 1746-171.
[5] 柳国环 ,练继建 ,王鸿振 ,于通顺,. 水动力质量实效施加方法及地基-筒型基础-塔筒体系的地震敏感性研究[J]. , 2016, 37(3): 767-775.
[6] 付晓东,盛 谦,张勇慧. 非连续变形分析方法中的阻尼问题研究[J]. , 2015, 36(7): 2057-2062.
[7] 樊晓一 ,冷晓玉 ,段晓冬,. 坡脚型与偏转型地震滑坡运动距离及地形因素作用[J]. , 2015, 36(5): 1380-1388.
[8] 邬爱清,冯细霞,卢 波. 非连续变形分析中时间步及弹簧刚度取值研究[J]. , 2015, 36(3): 891-897.
[9] 郑 允,陈从新,朱玺玺,欧 哲,刘秀敏,刘婷婷. 地震作用下岩质边坡倾倒破坏分析[J]. , 2014, 35(4): 1025-1032.
[10] 师 林 ,朱大勇 ,沈银斌 . 基于非线性统一强度理论的节理 岩体地基承载力研究 [J]. , 2012, 33(S2): 371-376.
[11] 鲁文妍,钟登华,佟大威,李明超. 基于三维地质模型的地下洞室群地震动力响应分析[J]. , 2012, 33(3): 919-924.
[12] 徐栋栋 ,邬爱清 ,卢 波 ,郑 宏 . 基于结构面抗剪强度演化的块体动力稳定性分析[J]. , 2012, 33(12): 3545-3553.
[13] 王 帅 ,盛 谦 ,朱泽奇 ,肖培伟 . 地震荷载作用下地下洞室不利地质结构塌落机制研究[J]. , 2012, 33(10): 2897-2902.
[14] 石玉成,秋仁东,孙军杰,胡明清. 地震作用下预应力锚索加固危岩体的动力响应分析[J]. , 2011, 32(4): 1157-1162.
[15] 陈青生 ,高广运 ,何俊锋. 地震荷载不规则性对砂土震陷的影响[J]. , 2011, 32(12): 3713-3720.
Viewed
Full text


Abstract

Cited

  Shared   
  Discussed   
No Suggested Reading articles found!