结构破坏

Took Chongqing Gong-he tunnel as an engineering example and studied the failure mechanism of surrounding rock and the correlation with bolt support system by using the methods of theoretical analysis, modeling test, numerical simulation and in situ test, some helpful conclusions were arrived as follows.Firstly, a new failure criterion for transversely isotropic rock mass was proposed with consideration of bedding plane orientation and major principal stress, and the corresponding algorithm, arrived through VC++6.0, can be easily embedded into the software FLAC3D for the geotechnical calculation.

论文在国家自然科学基金专项基金创新群体基金项目(No.50621403)以及国家自然科学基金重点项目"隧道与地下空间工程结构物的稳定性与可靠性(No.50334060)"的资助下，以共和隧道为示范工程，运用理论分析、物理模型实验、数值模拟和现场测试等手段，对共和隧道大埋深段层状岩体的围岩变形破坏机理、锚杆支护力学效应及围岩-支护结构的变形特征等内容进行了研究，其主要研究成果有：①在总结和探讨国内外学者提出的层状岩体经验型连续介质破坏准则基础上，结合层状岩体力学特性，考虑层面方向和最大主应力方向两个影响因素，提出了共和隧道层状岩体横观各向同性破坏准则；采用汇编语言VC++6.0实现了横观各向同性弹塑性本构关系的算法，并嵌入FLAC3D有限差分数值分析软件接口中实现数值运算。

In order to deep holding the engineering characteristic of the coarse-grained soil, this paper researched object that is the coarse-grained soil of the diametre from 0.1mm to 20mm that was often applied in the dam body filter structure, using the experiment method, carrying out the experiment the research of the coarse-grained soil permeability characteristic.

粗粒土在水力作用下，是一种结构极不稳定的土体，在渗流作用下极易发生渗透变形，容易引起坝体的渗透变形破坏。从渗透系数的变化上分析，其渗透变形过程是一个连续的过程，土体的破坏形式大都属于管涌破坏，破坏坡降较小，一般破坏坡降都小于2.5，有的甚至小于1.0。

A five-story frame building's displacement and energy response are discussed under three different types earthquake waves.

对比了位移破坏准则与双指标破坏准则在判断结构失效时的差异以及不同双指标破坏模型在评价结构失效时的差异。

5As for creep of the marine soft soil, the micro-mechanism of one-dimension creep is proposed: Under slight load, the initial bone strength and rank will be destroyed, while, as the time advances, deformation increases, void ratio decreases and inner particles move, bonding among particles become tight and the structure changes, and then the restitute of the old structural damage exceeds the new one. Consequently, creep will trend towards decelerate steady state ultimately.

揭示了软土一维蠕变的微观机理：当土样受荷较小时，尽管土样初始结构要受到影响，某些颗粒连结强度、胶结性、定向排列性遭到破坏，但随着时间的增长，变形增大，孔隙比减小，土体内部颗粒发生位移，使得某些颗粒结构间的联结更紧，胶结因而逐渐恢复，定向排列性亦略有回升，从而使得结构缺陷的愈合超过胶结的破坏和新缺陷的形成，蠕变最后趋于减速稳定状态。

According to the function of the structure and the mechanics characteristic of the building, the principle of break melt safely destroy is presented by analyzing every possible destroyed patten of the structure with a framewok. According to the document 1, in this paper the stability calculating equation of accessorily built air raid basement with a framework under the load of shock wav...

根据建筑物的结构性能和力学特点，针对框架建筑在冲击波作用下的各种可能破坏形态进行分析，提出&断融安全破坏&原则，依据罗文豹提出的核爆炸冲击波作用下高层建筑防空地下室的稳定性分析[1] ，建立框架结构下的附建式防空地下室在冲击波荷载作用下的稳定计算方程，提出结构构造措施。

The microstructure of MDF and MDF tested were studied. The results showed that the fibers in MDF are arranged randomly. Some of them arranged separately, most of them arranged in bundles. There are many blind holes between the fiber cells in MDF. The damage of MDF's compressive creep is the result of new cranny occuring, spreading and the combination of old cranny. In the repressing process, besides the pressure, heat is also the main factor on the damage of MDF, which can accelerate the adhension layer to deteriorate and lead to the gule strength decreasing.

结果表明：MDF的纤维排列无规则，纤维排列形态除少量纤维呈单根状外，大量的纤维以纤维束的形态排列；纤维之间存在许多大小不等的孔洞，呈不贯通状；MDF蠕变损伤是不断萌生新的裂隙并扩展和合并原有裂隙的结果；MDF二次加工过程中，除了压力是破坏MDF结构的主要因素外，加热温度使MDF胶层老化，胶合强度下降，也是破坏MDF结构的主要因素；MDF的破坏形态除了有纤维拉断外，还有纤维拔出和胶粘剂脱落。

Whatever methods you chose, the destruction of the TMJ was also found. At 3 days posttrauma hemarthrosis could be seen in most of the joints of both groups. Fibrous effusion was seen in a joint of surgery treatment group at 1 month posttrauma. 3 months later, fibrous ankylosis was found in the conservative treatment group.

不管采用哪种治疗方法，关节结构的破坏性改变自始至终都存在，早期都出现关节积血及关节结构的破坏；2周后可有关节盘不规则破坏，甚至完全崩解，关节腔内出现渗出液。1月时，可见固定组动物的关节腔内有纤维性渗出。3月时绝大多数关节结构基本存在，但可见有许多裂隙或囊样变，不固定组内有一动物的关节内出现了纤维性关节强直的表现。

The corrosion resistance of chloride ion for concrete admixed with fly ash and slag is tested,and the corrosive surroundings of steel reinforcement concrete in splashing marine zone and fluctuating water level zone in the south of China are simulated.

东南沿海的海工钢筋混凝土结构物破坏的主要原因，是海水中氯离子对结构物的侵蚀；北方则是结构物受冻融破坏和氯离子侵蚀[1] 。

According to the structure of aircraft carrier and existing anti-ship missile warhead,the structural target with ribbings and experimental semi-armor-piercing warhead were designed with geometer similar principle.The processes of warhead penetrating the ribbings structural and homogeneous targets were investigated experimentally in the shooting range,and the end-point trajectory parameters in hitting conditions and the breakage mode of target were gained.

以舰船典型筋板结构为目标，设计了带加强筋的结构靶，并用模拟实验弹体，对单层带加强筋的结构靶进行了斜侵彻实验，通过天幕靶和高速运动分析系统的测量，得到了两种倾斜着靶条件下不同着靶位置的靶前、靶后弹道参数；通过对靶板破坏结果的分析，得到实验弹靶条件下加强筋结构靶的破坏模式。

It was researched that the destruction of bridge deck overlay is not for its intension, one key factor is bonding layer structure which is the main difference between deck pavement and the common road pavement, and bonding layer destroy or invalidation is an important causation of so many bridge deck overlay destruction nowadays.

据研究，桥面铺装层的强度不是桥面铺装破坏的原因，粘结层结构是影响整个铺装层体系性能的关键因素之一，也是桥面铺装与普通路面结构的一个主要区别，粘结层破坏或失效是目前许多桥面铺装破坏的一个重要原因。

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。