Effects of vertical seismic force on initiation of the Daguangbao landslide induced by the 2008 Wenchuan earthquake
Effects of vertical seismic force on initiation of the Daguangbao landslide induced by the 2008 Wenchuan earthquake
复制标题
垂直地震力对2008年汶川地震大光堡滑坡引发的影响
DOI：
10.1016/j.soildyn.2014.06.036
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发表时间：
2015-06
影响因子：
4
通讯作者：
Y. Li
中科院分区：
文献类型：
--
作者：
Y. Zhang;J. Zhang;G. Chen;L. Zheng;Y. Li
以2008年汶川地震诱发的大光堡滑坡为例，分析了竖向地震力对近断层大型滑坡起滑机理的影响。现场调查表明，张拉破坏在破坏机制中起着重要作用，张拉破坏是由于地震发生时在次震区发生了较大的垂直地震运动的影响。首先，提出了近断层大型滑坡地震分析中的两个关键问题：1)如何选择和校正具有显著同震位移的严重近断层激励；2)如何考虑滑坡尺度对材料强度估计的影响。然后，为了研究竖向强地震力对大光堡特大滑坡起爆的影响，选取了5种情况：1)静力作用；2)拟静力-水平；3)拟静力横竖；4)动态-横向；5)动态水平和垂直，使用有限差分程序FLAC3D进行。从张拉破坏面积、安全系数和位移三个方面给出了仿真结果。竖向地震力对地震边坡破坏机制的影响显著，水平和竖向情况下的拉破坏区域和位移大于水平和竖向情况下的拉破坏区域和位移。
This paper analyses the effects of vertical seismic force on initiation mechanism of near-fault large-scale landslides by using the Daguangbao landslide induced by the 2008 Wenchuan earthquake as an example. Field investigations showed that tension failure plays an important role in failure mechanism, and the tension failure is due to the effect of a large vertical seismic motion that occurred in the meizoseismal area during the earthquake. Firstly, two key issues in seismic analysis of near-fault large-scale landslide are proposed: i) how to select and correct the severe near-fault excitations with significant co-seismic displacements and ii) how to consider the effect of the landslide scale on estimation of material strength. Then, in order to investigate the effect of the severe vertical seismic force on the initiation of the huge Daguangbao landslide, five cases, 1) static; 2) pseudo-static only-horizontal; 3) pseudo-static horizontal-and-vertical; 4) dynamic only-horizontal; 5) dynamic horizontal-and-vertical, are performed using the finite difference program FLAC3D. The simulation results are presented in terms of tension failure area, factor of safety, and displacement. The results confirm the significant effects of vertical seismic force on seismic slope failure mechanism as the tension failure areas and the displacements observed in the case of horizontal-and-vertical are larger than those observed in the case of only-horizontal.
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汶川地震引发的最大滑坡特征及破坏机制，2008年5月12日，中国
影响因子：
6.7
作者：
Huang, Runqiu1;Pei, Xiangjun1;Fan, Xuanmei1, 2;Zhang, Weifeng1;Li, Shigui1;Li, Biliang1
通讯作者：
Li, Biliang1
影响因子：
6.7
作者：
Fawu Wang;Q. Cheng;L. Highland;M. Miyajima;Huabin Wang;Changgen Yan
通讯作者：
Fawu Wang;Q. Cheng;L. Highland;M. Miyajima;Huabin Wang;Changgen Yan
DOI：
10.1016/0148-9062(90)94394-9
发表时间：
1988
期刊：
--
影响因子：
--
作者：
E. Hoek;E. T. Brown
通讯作者：
E. Hoek;E. T. Brown
地震引发滑坡活动性的 DDA 验证
影响因子：
7.4
作者：
Y. Zhang;J. Wang;Q. Xu;G. Chen;J. X. Zhao;L. Zheng;Z. Han;P. Yu
通讯作者：
P. Yu
影响因子：
2.8
作者：
M. Michele;D. Raucoules;J. Sigoyer;M. Pubellier;N. Chamot‐Rooke
通讯作者：
M. Michele;D. Raucoules;J. Sigoyer;M. Pubellier;N. Chamot‐Rooke