| 层状地壳的等效力学模量和分层应力 |
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| 引用本文： | 武红岭.层状地壳的等效力学模量和分层应力[J].地球学报,1999,20(3):225-231. |
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| 作者姓名： | 武红岭 |
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| 作者单位： | 中国地质科学院地质力学研究所,北京 |
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| 基金项目： | 国家自然科学基金,地质力学开放实验室项目 |
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| 摘 要： | 针对地球动力学研究中的板壳力学模型的分层问题，根据等效原则， 给出了用各分层弹性参数和厚度表示的中性面位置、折合抗弯刚度和等效弹性参数。结合实际地壳受横向和侧向力作用时产生的弯曲形变和应力，具体介绍了用这种折算模量的方法去求解地壳中的应力、应变状态， 并通过比较等效应力与各分层应力的差异， 阐明了岩石力学性质的不同对各圈层应力的影响作用。研究进一步表明，来自地壳深部的垂直向上的力是造成上部地壳伸展类构造的重要因素之一。
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| 关 键 词： | 层状地壳 等效模量 分层弯曲应力 |
The Effective Elastic Moduli and State of Stress in the Multi-layer Crust |
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| WU Hong-ling.The Effective Elastic Moduli and State of Stress in the Multi-layer Crust[J].Acta Geoscientia Sinica,1999,20(3):225-231. |
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| Authors: | WU Hong-ling |
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| Institution: | Institute of Geomechanics, CAGS, Beijing |
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| Abstract: | In order to adapt plate and shell models to studying geodynamic problems in the representative crustal layer, this paper gives the location of the neutral plane,general expressions of effective bending stiffness and elastic moduli of the multi-layer plate according to the effective principle. They are expressed in terms of thickness of each layer and elastic moduli of the plate.The author introduces this effective method in detail to solve the problem of stress and deformation in the crust by using a model of three-layer plate subjected to vertical and horizontal loads. The difference between the effective stress and the layered stress in the crust is pointed out. It is the rock mechanical property that affects state of the stress in layered crust.The author holds that the vertical upward forces from the deep crust is an important factor that causes the tensile tectonic deformation at the surface of the earth. |
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| Keywords: | multi-layer crust effective moduli layered bending stress |
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