结构破坏

The second order asymptotic formulation for reliability analysis of parallel systems is employed in calculating the fatigue failure probability of the failure path of the system.

由于结构系统的疲劳破坏是一个受到大量不确定因素影响的现象，因此运用结构可靠性分析的基本理论和方法，对结构系统进行疲劳可靠性分析十分必要。

It is shown that the weak plane of sedimentary structure such as the bedding of weak plane type, sets or cosets plane, bedded plane and unconformity interface will produce main influence on the mechanical properties of sedimentary rock mass.

基于沉积结构面的成因类型，通过理论分析和实验研究，分析了沉积结构面的变形与破坏特征，研究了沉积结构面力学特征及其力学效应，提出了弱面型层理、层系或层系组界面和岩层面以及不整合面均为沉积构造弱面，这些弱面对沉积岩体力学性质产生重要的影响。

At the same time we provided the double trigonometric progressional solution at the common boundary condition. And combining with the taken test of such plate abroad this analysis method was proved to be accurate and credible.In the third chapter, reasonable finite element models for such structure were established and a static non-linear analysis was made, and we summarized the rule of this structure about the aspects of force, deformation and destruction.

第三章对薄壁箱体现浇混凝土空腹板楼盖结构建立了合理的有限元分析模型，进行了静力全过程分析，侧重分析其在竖向荷载作用下的受力性能，总结出此结构体系的内力、变形分布及破坏过程的规律，并结合国外试验和国内现行混凝土结构设计规范，对这种结构的冲切计算进行了简单的探讨，提出了冲切计算的修正公式。

Firstly, the paper carried out test study base on the pseudo-static test under horizontal loads on four two-spanned model members of FSMRCSS, including three 1/2-scaled two-storeyed models and one 1/3-scaled three-storeyed model. By the test study, the paper analyzed the test results, including analysis on mechanical property of the constructure under vertical loads, and failure mode, deformation capacity, aseismic performance under horizontal loads and constant vertical loads. The paper also compared LFSWSUMS with FSMRCSS on aseismatic property.

本文首先对三个两跨两层和一个两跨三层的底部大空间框支密肋复合墙结构的1／2和1／3比例模型进行伪静力试验研究，通过对底部大空间框支密肋复合墙结构在竖向荷载及与水平低周反复荷载共同作用下的受力性能的试验研究，探讨了结构的变形性能、滞回耗能和破坏形态，并与框支砌体结构进行对比分析。

In order to investigate buckling mode, buckling load and failure mode of structure, shear experiments were conducted for stiffened thin-walled composite plate. Finite element method was also used to analyze the buckling behavior of that composite structure. Analysis results reveal buckling mode and buckling loading of finite element analysis are accordable with experimental results.

通过对复合材料薄壁加筋板结构进行剪切载荷下的屈曲试验研究，得到结构的屈曲模态、屈曲失稳载荷以及破坏形式，并通过有限元方法对结构的屈曲进行数值分析，分析得到的复合材料薄壁加筋板结构的屈曲模态和试验结果一致，屈曲载荷与试验结果吻合较好。

First, the actuality of Jiangyin bridge's deck surfacing are reviewed. Improper materials and pavement structures, severe conditions, overload and heavy traffic are deemed to be the main factors which result to deterioration of the deck surfacing. Then, programme of local repair asphalt mixture design has been proposed. It is considered that epoxy asphalt mixture and guss asphalt mixture are propitious to the local repair. The epoxy asphalt is also chosen as the adhesive layer material. Next, two pavement structures for steel deck plate surfacing have been tested. The most suitable asphalt surfacing structures have been proposed for the local repair. Finally, the elaborate local repair schemes of Jiangyin bridge's deck surfacing are proposed.

论文首先调查评估了江阴桥桥面铺装的现状，分析了江阴桥桥面铺装破坏的原因，认为材料及结构选用不当、使用条件苛刻、超载与大交通等是主要原因；其次对修复铺装混合料进行了配合比设计，认为优化后的环氧沥青混合料与浇注式沥青混合料适合于江阴桥的铺装修复，而粘结材料则采用环氧沥青粘结剂；然后参考国内外已有的桥面铺装结构组合，对两种复合结构进行了比较研究，提出了适于江阴桥桥面铺装局部修复的铺装结构组合；最后在各项研究的基础上，提出了江阴桥桥面铺装局部修复的具体方案。

Treatment at a high temperature would bring big changes to the structures of titanate nanotubes. When the calcination temperature was higher than 450℃, the tubulous structure of titanate nanotubes was destroyed and transformed into anatase phase.

高温煅烧处理对钛酸盐纳米管的结构影响较大，当温度高于450 ℃后，纳米管的层状结构被破坏，晶体结构转化为锐钛矿相的TiO2结构。

Analysis result shows that the dynamic interaction between wheel and rail and the rail-pad force of the strengthened track are little bigger than those of the unstrengthened track,the safety grades of the tracks are same,the strengthened track can benefit to decrease the displacements of all components of track structure obviously,to restrain the deformation of track effectively,and to reinforce the stability of railway,especially the lateral displacement and the gauge enlargement of the strengthened rail are about 33% of original rail.

分析结果表明：强化后轨道结构的轮轨动态相互作用力及轨枕支点压力均较强化前的相应值略大，但皆属相同安全合格等级；强化轨道结构位移大幅度降低，有效抑制轨道结构变形，增强线路稳定性，尤其是钢轨横向位移和轨距动态扩大量较强化前下降十分显著，前者仅约为后者的1/3左右；强化轨道也有利于降低轨下结构振动和减轻列车提速后对轨下基础的破坏。

But because of its big slenderness ratio, smaller rigidity and damping, it is easy to cause a larger vibration in the windload and iceload function and so on, mast structure destruction accidents frequently occurred, has caused engineering and academic circles\\\s concern, this article summarizes the main structure damage diagnosis methods, carrys on preliminary dynamic analysis and the time-frequency distribution analysis with the vibration signal to the mast structure, and proposes the signal processing method is a appropriate method on the diagnosis to the mast damage.

但是，由于桅杆结构长细比很大，刚度、阻尼较小，在风荷载、裹冰荷载等作用下容易产生较大幅度的振动，桅杆结构的破坏事故时有发生，引起了工程界和学术界的重视，本文总结了几种主要的结构损伤诊断方法，并对桅杆结构进行了动力分析和振动信号时频分析，并提出信号处理的时频方法对桅杆损伤进行诊断比较合适的。

From all the work a set of complete methods of analyzing and calculating fatigue reliability of structure systems are put forward. The fatigue reliability of structure systems can be calculated by searching failure modes and using the series-wound model composed of the failure modes.

由此针对结构系统疲劳破坏的特点，本文提出了一套完整的结构系统疲劳可靠性的分析和计算方法，该方法通过搜索结构系统的主要失效模式，应用失效模式组成的串联模型计算结构系统的疲劳可靠性。

In the United States, chronic alcoholism and hepatitis C are the most common ones.

在美国，慢性酒精中毒，肝炎是最常见的。

If you have any questions, you can contact me anytime.

如果有任何问题，你可以随时联系我。