Applying modified discontinuous deformation analysis to assess the dynamic response of sites containing discontinuities

Applying modified discontinuous deformation analysis to assess the dynamic response of sites containing discontinuities
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应用改进的不连续变形分析来评估包含不连续部位的动态响应

DOI:
10.1016/j.enggeo.2018.10.011
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发表时间:
2018-11
影响因子:
7.4
通讯作者:
Chen Guangqi
Chen Guangqi
中科院分区:
地球科学1区
文献类型:
--
作者:
Peng Xinyan;Yu Pengcheng;Zhang Yingbin;Chen Guangqi

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准确地考虑地震波在不连续介质中的传播是岩石工程中的一个关键问题。非连续变形分析(DDA),与研究不连续行为的能力,是通过将基于粘性边界和自由场理论的地震输入方法进行修改。在验证了修正DDA的准确性后,对2008年日本岩手-宫城地震和2008年汶川地震引起的东河口滑坡两个实际应用进行了模拟和再现。结果表明,改进的DDA能较准确地模拟地震波在不连续介质中的传播。此外,仿真结果表明,不连续性是关键的结构的动力响应。总之,修改后的DDA提供了一种替代方法,用于分析含有不连续性的网站的动力响应。
The accurate consideration of seismic wave propagation through discontinuous media is crucial in rock engineering. Discontinuous deformation analysis (DDA), with the ability to study discontinuity behaviors, is modified by incorporating a seismic input method based on a viscous boundary and the free-field theory. After confirming the accuracy of the modified DDA using several verification examples, two practical applications, (1) the extreme ground motion during the 2008 Iwate–Miyagi earthquake, Japan, and (2) the Donghekou landslide induced by the 2008 Wenchuan earthquake, China, are simulated and reproduced by the modified DDA. The results show that seismic wave propagation through discontinuous media can be accurately simulated by the modified DDA. Further, the simulation results indicate that discontinuities are critical in the dynamic response of structures. Conclusively, the modified DDA provides an alternative approach for analyzing the dynamic response of sites containing discontinuities.
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