打不开，发到我邮箱吧。
[email protected] Abstract
摘要
In all concrete constructions besides the common strength problems, in presence or not of seismic activity, serious problems from environmental attack may be presented which significantly decrease their durability and service lifetime.
混凝土结构除了通常的强度问题外，坏境侵袭也是一个严重的问题。不管是不是地震，这种侵袭带来的后果一旦显现出来将严重降低混凝土结构的耐用年限和使用寿命的降低。
The most common case of construction deterioration is the corrosion of steel reinforcement.
混凝土结构被侵袭最常见的原因是其内的钢筋被腐蚀。
The initiation mechanisms leading to steel depassivation, such as concrete carbonation and chloride penetration, have been thoroughly studied and modeled in the past.
钢筋去钝化的初始机理有：混凝土的酸化作用和氯离子侵蚀等，它们已经被充分研究并且已经建立了模型。
However, for the corrosion propagation period still there are no acceptable models to simulate the corrosion rate and further to estimate precisely the time when the corrosion progress signals the end of the structure service life.
但是我们还没有针对腐蚀的发展阶段建立模型来模拟腐蚀速率，从而不能准确的预测混凝土结构的报废时间。
In the present work, the main corrosion initiation mechanisms are shortly presented.
之前的研究使我们很快知道腐蚀的初始机理的作用结果。
Further, the propagation period and the main consequences on mechanical properties of steel and concrete are analyzed.
现在我们研究腐蚀的发展阶段及其对钢筋和混凝土机械性能的主要破坏结果。
The experimental results show that with increasing duration of exposure to a corrosive environment, the steel mass loss increases appreciably.
实验结果表明：随着在腐蚀环境暴露时间的增加，钢筋的质量损失加剧。
This leads to a significant increase of the applied stress.
这导致了作用应力的急剧增加。
In addition, a significant reduction of the tensile ductility of the material was observed.
另外我们观察到拉伸塑性的急剧降低。
For laboratory salt spray exposure periods, some of the tensile properties of steel bars drop to values lying below the limits, which are set in the existing standards for using steels in reinforced concrete members.
在实验室盐雾暴露期，有些钢筋的抗拉性能降到可查阅最低标准之下。
The experimental results from the accelerated corrosion tests on bare steel bars are in a good qualitative agreement with results from steel bars embedded in aged concrete.
裸露钢筋的加速腐蚀试验结果与长期镶在混凝土中的钢筋腐蚀结果吻合。