查询词典 restriction crack

Secondly, the paper carries on the destruction processes and the stress distribution situation numerical simulation of the concrete three point bending specimen with bias crack under static load function,, and analyze specimen crack expansion and the destruction mechanism, obtain the reason that the crack expanding flectional way is because the material nonuniformity, in the same time, from the specimen destruction process chart we can see that the crack bias degree has some influence on the crack expansion way.

其次论文对含偏置裂纹的混凝土三点弯曲试件在静态载荷作用下的破坏过程和应力分布情况进行了数值模拟，并对试件的裂纹扩展和破坏机理进行了分析，得出裂纹扩展的曲折性是由于材料不均匀性所引起的，同时从试件的破坏过程图中可以看出，裂纹的偏置程度对裂纹的扩展路径有一定的影响。

The restriction,explored with the viewpoint of systems theory, can be divided into three kinds: whole restriction , gradational restriction and enviromental restriction.

如果用系统的观点考察这种制约，则主要表现为整体制约、层次制约和环境制约等方面。

Results The distinctive PCR products of the 6 isolated strains from Liaoning and Jilin areas through restriction with Hinf I ,Hha I ,Rsa I appeared two different kinds of RFLP restriction map. The strains HCAa9202,HCAp9203 and HCM9501 had the similar restriction maps with reference strain Gilliam,but they did not have restriction site of Hinf I ;Strains KDCt9402,KDCp9403 and KDCt9404 had the simular testriction map with reference strain Karp.

结果辽宁、吉林地区6株分离株的PGR特异性产物经Hinf I、Hha I、Rsa I酶切后呈现2种不同的RFLP图谱：HCAa9202株、HCAp9203株及HCM9501株与Gilliam参考株具有相似的酶切图谱，但缺乏Hinf I的酶切位点；KDCt9402株、KDCp9403株及KDCt9404株与Karp参考株具有相同的酶切图谱。

Therefore, the restriction and the guard yellow journalism not only needs hard restriction of politics and laws, but also needs to display strength of cultural soft restriction from the cultural angle, moreover along with societys development, the cultural soft restriction will play the more and more vital role .

因此，制约和防范黄色新闻就不仅需要政治、法规的硬制约，还需要从文化的角度入手，发挥文化的软制约力量，而且随着社会的日益发展，文化的软制约将起到越来越重要的作用。

To give the definition of the mass concrete and to concrete\'s cracks together with practical meanings of control ,and give a brief review on the research in the field at home and abroad, at last, methods to control temperature crack of the mass concrete from several aspects such as design measures,concrets material, construction schedules.etc are summed up; To explain the physical mechanics of the concrete and computing methods-Difference Method and Finite Element Method, and illustrate the application of their specific methods repectively;Several temperature factors that can influence the temperature stress of mass concrete baseplate are analyzed. The influence degree of temperature factor can be got through the ANSYS simulation computation the control of temperature can control the temperature stress, consequently control the temperature crack of mass concert baseplate; through the influence of the crack resistance ability of mass concrete baseplate which takes the reinforcement as a part is analyzed. By ANSYS simulation, the best suited volume ratio of reinforcement is found out, at same time the layout of reinforcement with the same volume ratio can also affect the resistance ability of mass concrete baseplate. Sum up of above analysis, anti-crack function of steel bar in early mass concrete baseplate is obvious, so it\'s necessary to consider beneficial effect of construction steel bar in research of temperature control on mass concrete baseplate.

本文先容了大体积混凝土及混凝土裂缝的基本概念，对国内外在这个领域里的研究现状作了扼要叙述，并从结构设计、混凝土材质、施工措施等方面总结了大体积混凝土温度裂缝控制的方法及防止措施；阐述了混凝土的基本物理力学性能，总结了大体积混凝土温度计算的方法——差分法和有限元法，并分别举例说明其具体应用的方法；分析了影响大体积混凝土底板温度应力的几种温度因素，利用ANSYS模拟计算，得出了每种因素的影响程度，通过分析提出了在这几种温度影响因素下如何通过控制温度以达到控制温度应力从而来控制裂缝的具体建议；针对大体积混凝土基础底板中配筋的不同对混凝土底板抗裂能力的影响不同，利用ANSYS进行模拟分析，得出底板中最合适的体积配筋率，同时分析了在相同体积配筋率下钢筋的具体布置对大体积混凝土基础底板抗裂能力的影响，分析表明，配置钢筋对混凝土结构的开裂阻止作用明显，在研究大体积混凝土温度裂缝题目时，要考虑钢筋在其中的有利作用。

The mechanism of lock corridor crack is rather complicated due to the unique structure of corridor. As a result construction technique improvement cannot totally eliminate corridor crack occurrence. According to the construction process and results of Jinghang Cannel Huaiyin 3rd Lock,certain technical measures and improvements in construction techniques,can efficiently control the corridor crack and avoid the occurrence of crack as much as possible.

船闸廊道裂缝的产生机理较为复杂，由于廊道独特的结构形式，仅仅从改善施工工艺方面来完全消除廊道裂缝的出现是很难的，从本次京杭运河淮阴三线船闸工程实施过程及结果来看，通过一定的技术措施和改善施工工艺，可使廊道裂缝得到有效的控制，同时避免了有害裂缝的产生。

Based on fuzzy feature that the concrete crack width affects concrete structure durability, the membership function that the crack width belongs to the durability failure is established, the calculation method of fuzzy probability about structure durability failure is submitted, and classifing standard of the sturucture durability state is proposed, In accordance with the stochastic nature that cracks on concrete bridges occur and grow, and by assuming that crack occurrence obeys nonstable Poission process, predicting and evaluating methods about future crack condition and durability state of concrete bridge structures are suggested.

依混凝土裂缝宽度对混凝土结构耐久性影响的模糊特性，建立了裂缝宽度隶属耐久性失效的隶属函数，提出了结构耐久性失效的模糊概率计算方法，并建议了结构耐久性状态的划分标准；针对混凝土桥梁裂缝发生、发展的随机性，以裂缝的发生服从非稳态的泊松过程的假设为前提，提出了混凝土桥梁结构裂缝未来状况及耐久性未来状态的预测评估方法。

Interface crack propagation problems under the influence of the central zone of the crack subjected to homogenous loads, the edges of the crack subjected to homogenous loads, the edges of the crack subjected to moving concentrated variable loads Px/ t and the origin of the coordinates subjected to point loads are studied separately, and analytical solutions of dislocation distribution functioncan also be attained.

对裂纹中心区受均布载荷、裂纹表面受均布载荷、裂纹表面受到运动集中变载荷、坐标原点受集中载荷作用下界面裂纹的扩展问题分别进行了研究，也获得了位错分布函数的解析解。

The micro mechanism considers that the inclusion in material, called micro defect crack, is the nucleus of internal crack initiation, interaction, between the stress field of the micro defect crack tip as loading and strain field of crystal lattice caused by crystal point passim (as vacancies or interstitial atom, H, O, N et al), will trap the point passim, and cause the enrichment of point passim around the micro defect crack.

其中疲劳裂纹内部萌生的核心是材料中的第二相粒子、夹杂物或微空洞，称为微裂纹；而微裂纹的长大是材料中间歇原子或空位等点缺陷在微裂纹尖端富集沉淀的过程，微裂纹的长大速率受到点缺陷富集扩散速率和疲劳载荷的双重影响。

Employed the Hamiltonian system theories of elastic mechanics, a series of crack singular analytical elements satisfying different boundary conditions along crack surfaces in the vicinity of crack tip are constructed. These hyper-elements can describe the crack tip fields accurately for different simplified fracture models.

应用弹性力学哈密顿体系理论，在裂纹尖端构造出满足不同裂纹表面边界条件的一类裂纹奇异解析元，该类超级单元能够准确描述不同简化模型下的裂纹尖端场。

Anna: No, I've got a hangover.

不是，我昨晚宿醉了。

We head into the mountains in Su's new Land Cruiser, stop for lunch at a scenic restaurant and then hang around drinking beer and eating fruit as two of his employees attempt to lure the birds with a tape recording of the fowl's mating call.

我们坐上苏的巡逻车向山顶出发，在一家风景优美的餐馆吃了中饭。然后我们喝着啤酒吃着水果四处逛。