岩土破损演化理论(I):破损空间  

Damage-fracture evolution theory of rock and soil(I): damage-fracture space

作　　者：党发宁[1] 

机构地区：[1]西安理工大学岩土工程研究所

出　　处：《岩土力学》2005年第4期513-519,共7页Rock and Soil Mechanics

基　　金：国家自然科学基金资助项目(No.10372078);陕西省教育厅专项科研计划项目(No.01JK139)

摘　　要：指出当前利用CT数研究岩土力学的所有方法为观察研究,浪费了宝贵的CT定量化信息。利用CT数定义了岩样某点的完整度和破损度。根据完整度和破损度的水平以及集合论定义了λ水平完整域、λ水平破损域和(1λ—2λ)截理,利用测度论精确度量它们的大小,在此基础上建立了岩土介质完整空间和破损空间的概念,为利用CT数开展岩土介质力学性质定量分析开创了新途径。如果将λ水平由细观值逐渐放大到宏观值,则该方法适应于宏观岩土力学,实现了宏观力学与细观力学的统一描述,实现了连续介质力学与多孔或裂隙介质力学的统一描述。This article points out each of the current analytical methods used in rock and soil mechanics through CT number research avail of observation, wasting the precious quantitative information of CT datum. Utilizing the CT number, the perfect degree and the damage-fracture degree of a point inside the rock sample are defined; the λ level perfect field, the λ level damage-fracture field and the ( 1λ — 2λ )level intercepted section are defined according to the level perfect degree and the level damage-fracture degree and the set theory; the size of the λ level perfect field, the λ level damage-fracture field and the( 1λ — 2λ )level intercepted section can be accurately calculated avail of the measure theory; based on these conceptions of the rock and soil media perfect space and damage-fracture space are established, paving a new way for the quantitative analysis of the rock and soil mechanics by means of the CT datum. If the λ level is magnified from the mesomechanics value to the macroscopic one, this method is suitable for the macroscopic geotechnical mechanics, realizing the unified description of the macroscopic mechanics and the mesomechanics, the unified description of the continuum mechanics and porous media or crannied media mechanics comes true, too.

关 键 词：破损度 λA水平破损域 (λ1-λ2)截理 测度 破损空间 

分 类 号：TU452[建筑科学—岩土工程]