| 非均匀荷载作用下层状岩体矩形裂隙力学特性分析 |
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| 引用本文： | 肖洪天,王炳军,岳中琦. 非均匀荷载作用下层状岩体矩形裂隙力学特性分析[J]. 工程力学, 2012, 29(12): 108-113. DOI: 10.6052/j.issn.1000-4750.2011.05.0279 |
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| 作者姓名： | 肖洪天 王炳军 岳中琦 |
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| 作者单位： | (1. 山东科技大学土木建筑学院，山东省土木工程防灾减灾重点实验室，青岛 266510；2. 香港大学土木工程系，香港) |
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| 基金项目： | 国家自然科学基金项目(51079081,41172242);山东省“泰山学者”建设工程专项经费项目(岩土工程专业) |
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| 摘 要： | 该文采用已发展的层状材料基本解对偶边界元方法，分析了层状裂隙岩体的力学特性。在分析无限域层状岩体中裂隙时，该对偶边界元方法退化为间断位移法。在建议的间断位移法中，只需沿裂隙一个面离散，采用9结点等参单元和非连续单元离散裂隙面。采用建议方法计算了作用有非均匀荷载矩形裂隙的间断位移。利用裂隙尖端附近的间断位移值，计算了应力强度因子。给出不同岩性组合情形时矩形裂隙应力强度因子的分布规律。
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| 关 键 词： | 间断位移方法 层状岩体 矩形裂隙 应力强度因子 非均匀荷载 |
| 收稿时间： | 2011-05-07 |
ANALYSIS OF RECTANGULAR CRACKS SUBJECTED TO NON-UNIFORM LOADS IN LAYERED ROCKS |
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| XIAO Hong-tian,WANG Bing-jun,YUE Zhong-qi. ANALYSIS OF RECTANGULAR CRACKS SUBJECTED TO NON-UNIFORM LOADS IN LAYERED ROCKS[J]. Engineering Mechanics, 2012, 29(12): 108-113. DOI: 10.6052/j.issn.1000-4750.2011.05.0279 |
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| Authors: | XIAO Hong-tian WANG Bing-jun YUE Zhong-qi |
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| Affiliation: | (1. College of Civil Engineering and Architecture, Shandong Key Laboratory of Civil Engineering Disaster Prevention & Mitigation, Shandong University of Science and Technology, Qingdao 266510, China; 2. Department of Civil Engineering, The University of Hong Kong, Hong Kong, China) |
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| Abstract: | This paper analyzes the fracture mechanics of layered rocks by using the dual boundary element method(DBEM).The DBEM is based on the fundamental solutions of a layered medium.In analyzing crack problems in the layered media of an infinite extent,the DBEM degenerates into a discontinuous displacement method(DDM).In the DDM,only one crack surface is discretized,and the 9-noded continuous and discontinuous elements are used to discretize the crack surface.A rectangular crack subjected to non-uniform and compressive loads is analyzed.By using the discontinuous displacement values,the stress intensity factor(SIF) values are calculated and compared for rectangular cracks in layered rocks consisting of different rocks. |
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| Keywords: | discontinuous displacement method layered rocks rectangular cracks stress intensity factors non-uniform loads |
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