| 华北平原强震构造带与潜在震源区划分 |
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| 引用本文： | 张世民,吕悦军,任俊杰.华北平原强震构造带与潜在震源区划分[J].震灾防御技术,2006,1(3):234-244. |
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| 作者姓名： | 张世民 吕悦军 任俊杰 |
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| 作者单位： | 中国地震局地质研究所,北京,100029 |
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| 摘 要： | 在莫尔-库仑理论中引用Drucker-Prager准则,对于基岩断层及其上的覆盖土体建立相应的弹塑性模型,观察在不同力学条件下（张应力、压应力、剪应力）,以及在基岩断层分别为正断或逆断作用下,上覆粉砂质土体和粘土质土体的错动变形。结果表明：在张应力作用下,粘土比砂土更易变形;在压应力作用下,砂土更易变形;而在剪应力作用下,粘土比砂土更易变形,且粘土抗剪强度越大,变形越大。在正断层作用下,在粉砂土与粘性土中所发生的变形并没有大的不同,而在逆断层载荷作用下,粉砂质土体比粘土质土体更容易变形位错。
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| 关 键 词： | 断层地表破裂 莫尔-库仑理论 Drucker-Prager准则 土体变形 |
| 收稿时间： | 2006-06-08 |
| 修稿时间： | 2006年6月8日 |
Seismotectonics and Potential Seismic Source Zonation of the North China Plain |
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| Zhang Shimin,Lu Yuejun and Ren Junjie.Seismotectonics and Potential Seismic Source Zonation of the North China Plain[J].Technology for Earthquake Disaster Prevention,2006,1(3):234-244. |
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| Authors: | Zhang Shimin Lu Yuejun and Ren Junjie |
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| Institution: | Institute of Geology, China Earthquake Administration, Beijing 100029, China;Institute of Geology, China Earthquake Administration, Beijing 100029, China;Institute of Geology, China Earthquake Administration, Beijing 100029, China |
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| Abstract: | Elasto-plastic finite element model has been set up for the study on surface rupture of different soil mass above bedrock fault,using Drucker-Prager Rule in Mohr-Coulomb theory. Under compressive stress silt soil is easier to deform than clay soil, while clay soil has more deformation under tensile stress and shear stress. In normal faulting of underlied bedrock fault, surface rupture in silt soil and clay soil have no obvious dissimilitude. In reverse faulting, the smaller the shear strength, the larger the dislocation for soil mass, and vice versa. That means silt soil is easier to deform than clay soil in reverse faulting. |
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| Keywords: | Surface rupture of faults Mohr-Coulomb theory Drucker-Prager rule Soil mass deformation |
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