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The main factors affecting the soil-structure interface behaviors were found experimentally and theoretically, including: 1 the thickness of the interface that is five to six times the average grain size of the soil; 2 the aeolotropy of interface, which is responsible for anisotropic response of the stress-strain response of the interface; 3 two physical states, including crashing and compression of the soil near the structure surface, which govern the stress-strain response of the interface strongly; 4 two shear deformation components due to sliding and constraint of the structure surface relative to the soil respectively, which forms the deformation of the interface; 5 the volumetric strain due to dilatancy, which is found to be composed of a reversible dilatancy component and an irreversible dilatancy component. 4. A unified constitutive model of the interface, based on new elasto-plasticity damage theory, was developed. It was confirmed to be effective for the conditions considering monotonic and cyclic shearing, coupling effect of shear and volumetric strains, evolution of physical state, micro-structure aeolotropy of the soil and the resulting aeolotropy of the interface as well as the three normal boundary conditions stated above. 5. 2D and 3D finite element formulations of the present model were derived and incorporated into the FEM codes. They were applied to the evaluation of practical engineering problems with different typical interfaces between soil and structure. The new model was shown to be reasonable and effective.

确定了粗粒土与结构接触面厚度约为5~6倍的平均粒径,首次揭示了接触面的细观结构异向性以及由此所引起的宏观剪切异向性,发现了在单调和往返剪切荷载作用下土颗粒破碎和剪切压密两种物态变化机制共同支配着接触面力学性质的变化,通过细观分析证实了接触面的变形可分解为一般同时发生的土与结构交界面上的滑移变形以及结构面位移约束范围之内土体本身的剪切变形两部分,观测到接触面受剪时表现出明显的相对法向位移,并可分解为可逆性和不可逆性两个分量;(4)建立了第一个能够统一地描述单调与往返剪切特性、剪应变与体应变耦合特性、细观结构和宏观剪切异向性以及土颗粒破碎等物态变化特性的土与结构接触面弹塑性损伤本构数学模型,并采用多种法向边界条件复杂加载路径的试验成果验证了新模型的合理性和有效性;(5)提出了新模型的二、三维有限元格式并结合实际边值问题进行了应用计算分析,比较了不同接触面本构模型对计算结果的影响,证实了新模型及其有限元格式不仅能够合理地描述土与结构接触面的主要力学特性,还能够较好地反映土体与结构物在接触面处的滑移、脱开等不连续现象。

The paper discusses the grain compressibility,crushability,shearing and strength characteristics of coral sand and points out that it has the characteristics of high porosity ratio,high friction angle and low strength.

特殊的物质组成、结构和发育环境导致珊瑚砂具有独特的工程性质。文章综述了珊瑚砂的压缩性、破碎性、剪切特性和强度特性,指出了其显著的土力学特点:高孔隙比、高摩擦角和低强度值。

In the research area, Barkol Lake Area, situated in the Barkol Basin of Xinjiang,China, 7 landscape elements were derived from pseudo color Landsat TM in 2000 by image enhancement and interpretation. Based on GIS and theory of the landscape ecology, secelected fractal dimension,separation, diversity Shannon-weaver, degree of consistency, degree of fracture and dominancy index, analyze the spatial pattern of the landscape.

运用景观生态学原理,借助地理信息系统,以LANDSAT TM标准假彩色合成影像数据作为主要信息源,经过图像增强处理和解译,结合各类地理统计数据,将研究区划分为7个景观类型,采用分离度、景观分维数、多样性、均匀性、破碎性、优势度等项景观指标分析了研究区的景观空间格局特征。

In geotechnical engineering field the material of modeling is geotechnical material, which has the typical properties of fragmentation, dispersing and flowage.

岩土工程模拟研究的主要对象是松散的岩土材料,这种材料的典型特点就是其破碎性和流动性。

Robbe-Grillet thinks that the new novel is incomplete, with the features of instantaneity of time, truthfulness of fact reflection and brokenness of system.

格里耶认为,新小说是不完整的小说,具有时间安排上的瞬间性、事理反映上的本真性、体系结构上的破碎性,因而与传统小说所具有的时间安排上的连续性、事理反映上的矛盾性、体系结构上的严密性相对立。

At first, this paper conducts in depth research on classification method, compaction propeties, granulometric composition and crushing of stone. On the basis of clarifying engineering characteristics of material of rock-filling embankment, requirements of ground treatment have been put forword in this paper. Then combined with the site test and engineering practice in SHUINAN Road and LANLIN Road, through the synthetical analysis of factors of influencing densification effect for the maximum grain size of filling material, lay-down thickness, granulometric composition, densification machinery and densification frequency etc., this paper studies key technical problems about construction technologies for spreading and leveling of filling material, choosing densification machinery, densification technology and slope construction systematically. Finally, construction technologies of filling lime-stone and sand-stone roadbed have been proposed in this paper ,which are significant for quality guarantee of highway engineering.

本文首先从石料的分类方法、压实特性、粒径组成以及破碎性等方面进行研究,在明确填石路基填料的工程特性基础上,进而提出了填石路基的地基处理要求,然后结合广西水南路和甘肃兰临路填石路基试验路段上的现场研究,通过对填石路基填料最大粒径、松铺厚度、粒径组成,压实机械以及碾压遍数等影响压实效果因素的综合分析,系统研究了填石路基填料的摊铺与整平技术、压实机械选型技术、压实工艺以及边坡施工技术等施工工艺中的关键问题,最后提出石灰岩类和砂岩类填石路基的施工工艺要求。

Highway construction lacks quantitative technological guidance. At first, this paper conducts in depth research on classification method, compaction propeties, granulometric composition and crushing of stone....

本文首先从石料的分类方法、压实特性、粒径组成以及破碎性等方面进行研究,在明确填石路基填料的工程特性基础上,进而提出了填石路基的地基处理要求,然后结合广西水南路和甘肃兰临路填石路基试验路段上的现场研究,通过对填石路基填料最大粒径、松铺厚度、粒径组成,压实机械以及碾压遍数等影响压实效果因素的综合分析,系统研究了填石路基填料的摊铺与整平技术、压实机械选型技术、压实工艺以及边坡施工技术等施工工艺中的关键问题,最后提出石灰岩类和砂岩类填石路基的施工工艺要求。

The key of Haier business process reengineering is market-chain. Rethinking and Reengeer all the old business process. It emphasize using the new integrity business process instead of the old breaked up business process which is disserved by kinds of function department, unobserved and hard menegent. It will perfect some target such as quality, cost and period notability. The proctice of Haier prove that the modle of the market-key business process reengineering is succusseced.

海尔业务流程再造的主要思想是以市场链为切入点,对原来的业务流程做重新思考和彻底的重新设计,它强调以首尾相接的、完整连贯的整合性业务流程来取代过去的被各种职能部门割裂的、不易看见也难于管理的破碎性流程,使企业质量、成本和周期等绩效指标取得显著的改善。

Jaw crusher series have features of big crushing ratio, uniform

颚式破碎机本系列产品,具有破碎性比大、产品料度均匀、结构简

Because they are impacted by the altitude、geographic setting、slope direction、topography and soil material, so the whole vertical zone becomes fragmentation、diversity and the transition from cool-temperate mixed needle-broad-leaved forest zone to needle-leaved forest zone.

本文详细的介绍了各个垂直带的自然地理特征,归纳出整个垂直带谱具有破碎性、温带到寒带的过渡性、重叠性等特点,原因是其受海拔、地理位置、坡向、微地形、地面组成物质的分异等因素的影响。

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推荐网络例句

In the negative and interrogative forms, of course, this is identical to the non-emphatic forms.

。但是,在否定句或疑问句里,这种带有"do"的方法表达的效果却没有什么强调的意思。

Go down on one's knees;kneel down

屈膝跪下。。。下跪祈祷

Nusa lembongan : Bali's sister island, coral and sand beaches, crystal clear water, surfing.

Nusa Dua :豪华度假村,冲浪和潜水,沙滩,水晶般晶莹剔透的水,网络冲浪。