The study about discrete body analysis and crustal movement analysis system development
离散体分析与地壳运动分析系统开发研究
基本信息
- 批准号:06555136
- 负责人:
- 金额:$ 8.38万
- 依托单位:
- 依托单位国家:日本
- 项目类别:Grant-in-Aid for Scientific Research (A)
- 财政年份:1994
- 资助国家:日本
- 起止时间:1994 至 1996
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
Based on hybrid virtual work principle, a numerical method applicable to elastic and visco-elastic progressive failure analysis was developed by Hamajima. To describe discontinuity between continuous elements, equal rigidity, rigidity multiplier of elements alpha and that between elements beta are defined in this report. Various accuracy analyzes demonstrate the error of this method can be reduced to 5% for both elastic and visco-elastic problems when beta is 10. Finaly, the analysis results of a crust movement model are presented, which shows that this method seems highly effective to the progressive failure analysis of geomaterials.The serious earthquake called great Hanshin Earthquake, happened on 17Jan., 1995 at southern. Hyogo perfecture in Japan, caused tremendous damage to the district. The importance of study of the crustal movement is recognized through this great earthquake. It is, however, the conventional method for evaluation of the behaviors of crustal movement is based o … More n the continuum mechanics model, and have not given any quantitative explanation on the progressive failure process acompanying the generation of faults in the earth. Until now, some simple models in which the earth crustal structure is modified by several crustal blocks divided by faults, and only slidings between blocks and the rotations of each block are considered, is developed to treat this problem. In this report, the same geometrical block-model is accepted by Hamajima. An analysis method which can treat the deformation in the blocks, the slidings and openings between blocks, is proposed. Also in this model, the mechanical effect of small scale discontinuities in the blocks is modified in the stiffness of elements by introducing a constitutive equation. A numerical simulation on the movement of crustal structures of Japan islands is carried out. The results show that the tensiling failure region calculated by the proposed model is very agreed with that of the active fault zones known in Japan islands. Less
基于混合虚功原理,Hamajima提出了一种适用于弹性和粘弹性连续失效分析的数值方法。为了描述连续单元间的不连续,本报告定义了等刚度、单元间α的刚度乘数和单元间β的刚度乘数。各种精度分析表明,当beta值为10时,该方法对弹性和粘弹性问题的误差均可降至5%。最后给出了一个地壳运动模型的分析结果,表明该方法对岩土材料的递进破坏分析是非常有效的。阪神大地震发生在1月17日。, 1995年在南方。在日本兵库县,对该地区造成了巨大的破坏。通过这次大地震,人们认识到研究地壳运动的重要性。然而,传统的评价地壳运动行为的方法是建立在连续介质力学模型的基础上的,并没有对地球上伴随断层产生的渐进破坏过程给出定量的解释。迄今为止,为了解决这一问题,已经发展了一些简单的模型,其中地壳结构是由断裂划分的几个地壳块体修正的,只考虑块体之间的滑动和每个块体的旋转。在本报告中,Hamajima接受了相同的几何块模型。提出了一种能处理砌块内部变形、砌块间滑动和开口的分析方法。在该模型中,通过引入本构方程,修正了单元刚度中块体小尺度不连续的力学效应。对日本诸岛地壳结构的运动进行了数值模拟。结果表明,该模型计算的张拉破坏区域与日本诸岛已知的活动断裂带非常吻合。少
项目成果
期刊论文数量(47)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
R.Hamajima,S.Han,T.Suzuki,Z.Wu,Y.Song: "Analysis of Discontinuous Rock Masses Based on the Variational Principle" Proc.of the 3rd Asian Pacific Conf.on Computational Mechanics. 3. 2229-2234 (1996)
R.Hamajima,S.Han,T.Suzuki,Z.Wu,Y.Song:“基于变分原理的不连续岩体分析”第三届亚太计算力学会议论文集。
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T.Nagao,M.Ueshima,S.Ueda: "An Indeoendent Check of VAN's Criteria for Signal Recognition" Geophysical Research Letters. 23・11. 1441-1444 (1996)
T.Nagao、M.Ueshima、S.Ueda:“VAN 信号识别标准的独立检查”地球物理研究快报 23・11(1996 年)。
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M.Hayashi,K.Hori,K.Ogiso: "Theory and Experiments of Urban CAES Concrete Tank Prestressed by Gel Pressure of Heavy Mud Backfilled in Submerged Shaft in Deep Soft Rock" Proc of the ISRM 8the Int.Congress on Rock Mechanics. 1. 575-578 (1995)
M.Hayashi、K.Hori、K.Ogiso:“深层软岩浸没竖井中重泥回填凝胶压力城市 CAES 混凝土罐预应力理论与实验”ISRM 8 岩石力学国际会议论文集。
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- 影响因子:0
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Hmajima R.: "Evaluation of Active Faults by Crustal Movement Analysis" Proc., 3rd Asian-Pacific Conf. on Compu. Mechanics. (1996)
Hmajima R.:“通过地壳运动分析评估活动断层”,第三届亚太会议论文集。
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Niitsuma,H.: "Discrimination of split shear waves by wavelet transform" Canadian Exploration Geophysics. Vol.29. 106-113 (1994)
Niitsuma,H.:“通过小波变换区分分裂剪切波”加拿大勘探地球物理学。
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