张以文,张西文,王振,等. 液化场地水库土石坝地震动力响应研究[J]. 华北地震科学,2021, 39(3):17-22, 65. doi:10.3969/j.issn.1003−1375.2021.03.003.
引用本文: 张以文,张西文,王振,等. 液化场地水库土石坝地震动力响应研究[J]. 华北地震科学,2021, 39(3):17-22, 65. doi:10.3969/j.issn.1003−1375.2021.03.003.
ZHANG Yiwen,ZHANG Xiwen,WANG Zhen,et al. Study on the Seismic Behavior of Earth-rock Dam Located on the Liquefiable Ground[J]. North China Earthquake Sciences,2021, 39(3):17-22, 65. doi:10.3969/j.issn.1003−1375.2021.03.003.
Citation: ZHANG Yiwen,ZHANG Xiwen,WANG Zhen,et al. Study on the Seismic Behavior of Earth-rock Dam Located on the Liquefiable Ground[J]. North China Earthquake Sciences,2021, 39(3):17-22, 65. doi:10.3969/j.issn.1003−1375.2021.03.003.

液化场地水库土石坝地震动力响应研究

Study on the Seismic Behavior of Earth-rock Dam Located on the Liquefiable Ground

  • 摘要: 基于有限差分法基本原理,采用FLAC3D软件对水库大坝在地震作用下的动力响应进行分析,研究地震强度、水库蓄水高度等对坝体稳定性的影响。结果表明:随着地震强度增加,坝基液化程度加剧,诱发的坝顶竖向沉陷增大;随着蓄水高度的增加,坝基液化程度和范围增大,坝顶竖向沉陷变形增大。当蓄水高度为10 m,地震峰值加速度为0.4 g时,坝顶沉陷量约为0.13 m,坝体稳定性降低,出现明显的潜在滑动面。因此在水库大坝选址、设计和施工中应注意可液化地基的地震灾害并做好相应的抗液化及加固措施。

     

    Abstract: Based on the basic principles of the finite difference method, the study was performed using FLAC3D software to analyze the dynamic response of the reservoir dam under seismic loadings. The earthquake intensity and the height of the reservoir's water level are studied as the key factors to the reservoir dam. The results show that as the earthquake intensity increases, the degree of liquefaction of the dam foundation increases, and the vertical sink of the dam crest increases; As the water height increases, the degree and scope of the liquefaction area of dam foundation increase, vertical sink and deformation of the dam crest increase. When the height of the water storage is 10 m and the peak acceleration of the earthquake is 0.4 g, the dam crest sink is about 0.13 m, the dam stability is decreased, and an obvious potential sliding surface appears. Therefore, in the site selection, design and construction of the reservoir dam, attention should be paid to the earthquake disaster of the liquefiable foundation and the corresponding anti-liquefaction and reinforcement measures should be taken.

     

/

返回文章
返回