结构破坏

Under confused sea condition, the structures may subject to very strong w ave impulsive 1oad due to slamming by the wave with significant crest when waves propagate underneath the structure and surge up to its subface. Previous studies indicate that impact pressures are characterized by an initial peak pressure of considerable magnitude but of short duration occurs, followed by a slowly-varying uplift pressure of less magnitude but of considerable duration, and which typically is first positive, then decreases to zero and becomes negative, In hostile sea state, the peak pressures may cause the damage of the horizontal members of the structures or make the whole superstructure collapsed.

若这些海上建筑物的上部结构底高程较低，在恶劣海况下当大波浪在其面板下面通过并与之接触时，面板下面除了作用有强度变化较缓慢的波压力外，在波峰刚接触到面板时尚存在着历时很短但强度极大的冲击压力，这种极强冲击荷载会引起建筑物的整个上部结构失稳或造成局部破坏。

The result is that the crystal structure of the sample irradiated at the dose of 1×10^5 Gy is of an obvious damage while the structure of the unirradiated sample is crystal band.

结果表明，辐照前聚四氟乙烯样品的表面是规则的带状晶形结构，经1×10^5Gy辐照后样品的晶状结构遭到了明显的破坏，向非晶态转变显著。

The result is that the crystal structure of the sample irradiated at the dose of 1 × 10^5 Gy is of an obvious damage while the structure of the unirradiated sample is crystal band.

结果表明，辐照前聚四氟氟乙烯样品的表面是规则的带状晶形结构，经1×10^5Gy辐照后样品的晶状结构遭到了明显的破坏，向非晶态转变显著。

ABSTRACT In order to study the thermally activated characteristics of plastic deformation and the effect of alloying element on the thermal activation of structural steels, the properties of plastic deformation for 20g and 13Ni3CrMoV steels have been examined in the temperature of 77—473K and strain rate of 〓. The experimental phenomena show that the effective stress of plastic deformation decreases with the increase of alloying elements content (namely solute solution softening) and the frequency factor deceases with the increase of effective stress.

本文以13Ni3CrMoV钢焊接结构的动态断裂破坏为背景，通过系统测试20g和13Ni3CrMoV钢的动态屈服特性，分析比较了结构钢的形变热激活特点，从频率因子〓随有效应力σ〓增大而下降和合金固溶软化的实验现象出发，在位错以弯折方式克服晶格Peierls位垒的基础上，提出了溶质原子与螺型位错热激活弯折相互作用的物理模型和σ〓-T分段线性关系的形变热激活理论假设，并借助计算机数值模拟，分析探讨了合金固溶软化的微观机制。

Active hydrogen atom and oxygen ion form Hydroperoxy radicals which surround the positively charged biological contaminants, and then react with three hydrogen elements of its protein structure, destroying and detoxicating the biological contaminants nature.

活性氢和氧离子(O2-)形成的氢过氧自由基，会包围着带正电荷的生物污染物，每一枚黏附在污染物表层的氢过氧自由基，会与其蛋白质结构中三个氢元素产生反应，完全破坏其结构，变成无毒状态。

A novel double hairpin molecular beacon that has more stable structure than traditional molecular beacon has been designed. Its hairpin structure will not fully open when it hybridizes to cDNA but the hybrid can be cut by restriction endonucleases, which leads to destroy of its structure and restore the fluorescence.

本论文的主要内容包括以下三个方面：(1)基于双发夹分子信标分析核酸甲基化酶及药物筛选我们设计了新型分子信标-双发夹分子信标，该探针具有比传统分子信标更稳定的分子结构，与互补核酸链杂交后发夹结构不完全打开，但在酶切反应后其发夹结构被破坏，荧光又可恢复。

The free-edge effect on composite laminates is one of the main factors of structural failure.

复合材料层合结构的自由边效应是复合材料结构总体破坏的主要因素之一。

If seismic force on the structure is large enough to fail the bearings, then the superstructure becomes vulnerable to unseating at the supports.

如果作用在结构上的地震力足以使支座破坏，则上部结构很容易从支承上脱落。

And temperature stress caused by road temperature is one of the most important factors damaging pavements.

路面结构温度变化状况反映了外界环境因素对路面结构的作用，产生的温度应力是路面破坏的主要因素之一。

The internal structures of geomaterials including soil, rock, asphalt concrete and cement concrete are complicated. The internal constitutions and structure of a geomaterial determine die stress and strain distribution and control the failure mechanism and process of that geomaterial when it is subject to loading.

土、岩及混凝土是一种内部结构极其复杂的材料，内部细观组成和结构决定了它们在外力作用下内部应力和应变等物理场的分布状态，在很大程度上控制了它们的宏观力学响应和破坏机理和过程。

She gently rebuff ed him, but agreed that they could be friends

她婉言拒绝了，但同意作为朋友相处。

If in the penal farm, you were sure to be criticized.

要是在劳改农场，你等着挨绳子吧！