结构破坏

The results indicated that the strength of corner joints increased with the increase, of thickness, density, moisture content, MOR and IB of the board, and that the measure of coefficient of variability for MOR and IB of the board would play a more important role in the stability and strength of corner Structure in furniture.

本试验中，以木质圆榫不可拆连接角结构抗变形强度和偏心凸轮连接角结构抗破坏变形强度为最高，试验的综合结果表明，可拆型连接的角结构强度总是低于不可拆型连接的角结构；角结构承受拉载的能力明显低于承受压载的能力。

Results (1) Osteitis and destruction of end-plate showed long T1 and long T2.(2) Anterior and lateral abscess had long T1 and long T2 presenting even and structure-less signal.(3) The intervertebral discs showed normal or only degeneration at the early stage, and destroyed at later stage.(4) With Gd-DTPA enhancement, fibrotic granulation around abscess and destroyed area was well demonstrated.(5) Abscess in the bone and/or paraspinal abscess, destruction of end-plate were the important evidence for early diagnosis.

结果 (1)椎体骨炎及终板破坏呈长T1长T2信号，(2)椎旁或椎前冷脓肿呈长T1长T2均匀无结构信号，且上下跨越范围较大，(3)早期椎间盘信号正常或只出现退变，晚期则被破坏，(4)Gd-DTPA增强扫描可清楚显示冷脓肿周围纤维肉芽组织及椎管内侵犯，(5)骨内小脓肿和/或椎旁脓肿、椎体终板破坏是MRI诊断早期脊柱结核的重要依据。

The theoretical analysis and the calculating results indicate that when the buildings are regular and not too high, to compare with the similar RC structure, the prestressed frame structure has a better stiffness after cracks, a larger ultimate loading capacity, and a beamhinge failure mechanism with better antiseismic performance.

理论分析和算例结果表明：对于层数适中、结构布置较规则的无粘结预应力楼盖框架结构体系与类似的钢筋混凝土结构相比，其具有较大的开裂后结构刚度、较高的结构极限承载能力及抗震性能良好的梁铰破坏机制。

And it is verified that the simulation methods in this paper are rational and the model is feasible.(2)Using the unconditionally stable implicit Newmark time intergration algorithm, the effects of some key factors such as buried depth, condition of soil layers and the earthquake excitative orientation are studied.The results show that dynamic response of structure is considerably affected by the thickness of overburden layer, and horizontal slice is more dangerous than upright slice.

2采用无条件稳定的Newmark隐式积分法进行地震响应分析，讨论各种因素对地下结构动力响应的影响，如：结构埋深、土层分布条件和地震激励方向等，并通过对结构的应力、位移、加速度等结果的分析，发现上覆土层厚度对结构动力响应比较大，水平分层比竖向分层更容易使地下结构遭受破坏。

Results; MRI showed such components as fat,fibre,and liquid in teratoma,and large vessels in fibrolipomatous angioma;lytic bone destruction in giant cell tumor...

结果：畸胎瘤含脂肪、纤维和液体等成分；纤维脂肪血管瘤含有粗大血管；骨巨细胞瘤呈溶骨性破坏，1例在T2WI有液-液平面；神经源性肿瘤通过骶孔与骶管内病变相连，神经节母细胞瘤和神经外胚层瘤破坏骶孔；9例脊索瘤在T2WI有条状低信号纤维结构和高信号粘液基质；未分化癌和淋巴瘤T1WI呈略低信号，T2WI呈略高和较高信号；19例转移瘤有多处骨骼破坏，5例只有骶椎侵犯。

Serious corrosion and destroy by the alkalescent waste water from ammonia soda producing process occurred on water treatment buildings in Jiaozuo Xin'an Chemical Factory.

纯碱工艺中碱性废液对混凝土结构水处理构筑物产生较严重的腐蚀和破坏。在其腐蚀破坏过程中，溶解性化学腐蚀、膨胀性结晶化学破坏和强碱腐蚀作用等几种腐蚀同时存在，并相互影响，起作用的影响因子有镁离子、氯离子、硫酸根离子和废液的强碱性等

In order to investigate the seismic behavior of hybrid structures and guide design of high-rise buildings, the research projects on shake table tests of global structure and pseudo static tests of relevant member were generalized which were conducted in State Key Laboratory for Disaster Reduction in Civil Engineering of Tongji University in recent 5 years.

混合结构试验研究一般针对具体工程，研究佐证不充分且缺乏共性，为掌握混合结构抗震性能，指导高层结构设计，结合同济大学土木工程防灾国家重点实验室近5年来开展的混合结构及其受力构件研究，总结出地震力作用下混合结构受力特点及破坏规律，验证三水准、两阶段设防目标下结构的可靠性。

Finally, stochastic vibration analysis of a two-floor frame structure by blasting seismic action is done by finite element program ANSYS. In order to contrast, that by nature seismic action is also done here, and displacement field, velocity field and stress field of this two kind of condition are obtained, and differences of the structure damage mechanics by two kind of action are analyzed. Dynamic reliability analysis of the two-floor frame structure is done using of simulation results, obtaining the safe reliability level of the structure by seismic action, and seismic safety evaluation of the frame is completed.

最后，运用有限元程序ANSYS对爆破地震动作用下一个两层框架结构进行了随机振动分析，为了进行对比，这里也对结构受天然地震动作用进行了随机振动分析，得到了两种地震动作用下结构响应的位移场、速度场和应力场的变化情况，分析了爆破地震动和天然地震动对建筑结构物破坏机理的不同；应用数值模拟的结果对该两层框架结构进行了动力可靠性分析，得到了其在地震动作用下的安全可靠度，完成对该框架的爆破地震安全性评估。

If the slope＇s rockmass is low counter-inclined or thick-interbedded with soft interlayer, its failure model is inclined to be tilting-collapsing; if the slope＇s rockmass is homogeneous and thin-bedded with hard discontinuity, its failure model is inclined to be splitting-collapsing; if the slope＇s rockmass is low sequence-inclined with densely deep tectonic joints and weathering fissures, its failure model is inclined to be sliding-collapsing.

当缓倾内层状岩质边坡的岩层较厚，岩性呈软硬互层状产出，或岩层间软弱夹层较厚时，常发生倾倒-崩落式破坏；当缓倾内层状岩质边坡的岩层较薄，且岩性较均一，或层间结构面力学性质较好时，常发生拉裂-崩落式破坏；当缓倾角层状岩质边坡岩层倾向坡外时，在陡倾构造节理和风化卸荷裂隙切割下，常发生滑移-崩落式破坏。

The main research contents are as follows:1. Through massive calculation, analysis and comparison, sum up the similarities and differences between the special-shaped cross sections and rectangular cross sections in mechanical features, between reinforced concrete special-shaped columns and rectangular columns in load-bearing capacity, ductility performance and provide necessary basic concepts and data for further understanding the characteristics of the special-shaped columns;2. Through massive elastic calculations and elasto-plastic analysis, under the preconditions of satisfying the code's requirements for axial compression ratio, limit value of lateral displacement and load-bearing capacity of normal section,oblique section and beam-column joint, under circumstances of different intensity of earthquake, structure dead weight, sort of site and column grid bay dimension, the variation regularity of maximum suitable height of structure, and thus sum up the maximum suitable height of structure for code for the purpose of macro-control while deciding the design scheme;3. Make a preliminary study on the stress feature of reinforced concrete special-shaped column and Z-shaped column of which the ratio of limb length to limb thickness is between 4~5 ,and the preliminary design method is suggested;4. Through elato-plastic time history dynamic analysis of typical projects, check up the weak storey of the special-shaped column structure and yielding, breaking and collapse mechanism to satisfy the earthquake resistant requirement to buildings of remaining stand under strong earthquake;5. Derive for project use simplified calculation formula of vibration period, suitable vibration period, suitable rigidity of special-shaped column structure through theoretical analysis, and provide an easy and practical method for deciding the structure scheme economically, safely and reasonably;6. Based on the study achievements in theory and massive analysis and calculations of this paper, sum up the regularities of inner force, deformation of special-shaped column structure and seismic conceptual design, and thus the suggection of seismic design of special-shaped column structures is presented.

本文研究的主要内容如下：通过大量的计算、分析和对比，总结出异形截面与矩形截面在力学特性、钢筋混凝土异形截面柱与矩形截面柱在承载能力、延性性能等方面的异同，为深入了解异形截面柱的特点提供必要的基本概念和数据；通过大量的弹性及弹塑性计算分析，在满足规程对轴压比、侧移限值及正截面、斜截面、节点承载力抗震验算要求的前提下，在不同抗震设防烈度、结构自重、场地类别及柱网开间尺寸情况下最大适宜高度的变化规律，并在此基础上总结归纳出异形柱结构的最大适用高度规定，可用于规程，以便于在确定方案时起到宏观控制的作用；对肢长与肢厚比在4～5的钢筋混凝土异形截面柱及Z形柱的受力特点进行初步探讨，提出初步的设计方法；通过对典型工程的弹塑性动力时程分析，检验异形柱结构的薄弱层及屈服、破坏、倒塌机制，以达到建筑物大震不倒的抗震设防要求；通过理论分析，推导出异形柱结构自振周期，以及适宜自振周期、适宜刚度的工程实用简化计算公式，为经济、安全、合理地确定结构方案提供简便实用的方法；在本文理论分析、计算以及大量的研究成果基础上，总结归纳出异形柱结构内力、变形的规律及抗震概念设计内容，并在此基础上提出异形柱结构的抗震设计建议。

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。

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如果有任何问题，你可以随时联系我。