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裂隙岩体的细观动力损伤模型
引用本文:李宁,张平,段庆伟,Swoboda G. 裂隙岩体的细观动力损伤模型[J]. 岩石力学与工程学报, 2002, 21(11): 1579-1584
作者姓名:李宁  张平  段庆伟  Swoboda G
作者单位:1. 西安理工大学岩土工程研究所,西安,710048;中国科学院寒区旱区环境与工程研究所冻土工程国家重点实验室,兰州,730000
2. 西安理工大学岩土工程研究所,西安,710048
3. University of Innsbruck,6020 IBK,Austria
基金项目:国家自然科学基金(19772039),中国科学院院长特别基金(9817)联合资助项目。
摘    要:通过分析单组裂隙细观特征对应力波传播特性的影响机理,提出了表达裂隙细观特征对波速影响的半连续介质动力损伤模型及表述其对波幅影响的细观损伤阻尼模型;并应用室内模型试验进行了对比验证,对比结果说明所提出的细观损伤模型较当前S. Valliappan和E. P. Chen的最新等效连续损伤模型更接近于试验结果。

关 键 词:裂隙介质  波传播特性  细观动力损伤模型  损伤阻尼张量
文章编号:1000-6915(2002)11-1579-06
修稿时间:2001-03-11

DYNAMIC MESO- DAMAGE MODEL OF JOINTED ROCKMASS
Swoboda G. DYNAMIC MESO- DAMAGE MODEL OF JOINTED ROCKMASS[J]. Chinese Journal of Rock Mechanics and Engineering, 2002, 21(11): 1579-1584
Authors:Swoboda G
Abstract:Based on the wave propagation theory on the jointed media,a dynamic damage model of the cracked medium is developed with the theoretical analysis and model test to investigate the jointed rockmass behavior under the blasting pulse. The presented model is capable of capturing the meso-behavior of dynamic response of the joints and the wave propagation properties under the blasting pulse,as well as the consideration of the degradation of the material stiffness and strength by the classical continuum damage mechanics theory. Comparisons between the proposed model and the test results are also discussed. The proposed model is checked by the model test and much better correlation between the theory and the test is obtained compared with the model of Chen or Valliappan. The dynamic meso-damage tensor model and the meso-damaged damping tensor model are also proposed based on the propagation model.
Keywords:cracked medium  wave propagation properties  dynamic meso-damage model  damaged damping tensor
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