【正文】 nization process will speed up the narrow can cause lowering of alkalinity and steel surface of the steel reinforcement corrosion of iron is steadily losing its electronic and then in water, and then under the conditions in the aerobic react with , the consumption of time many times a lot of erosion allows the production of reinforced concrete protective layer cracks, and along the direction of Jiangdi Gangjin the bond between steel bars and concrete strength, reinforced concrete structure, resulting in the loss of carrying studies suggest that the most serious corrosion of nonreinforced carbon protective layer 15mm the other hand, due to imperfections on the surface and the cracks in the concrete, so that corrosion may be ahead of the start time, and the corrosion rate may be greatly the steel stress is less than the yield point, the damage rate is when the steel stress exceeds the yield point, the damage rate will increase several latter is known as stress fracture, which is brittle and dangerous of steel reinforcement will reduce the pressure area, destroy the structure of bond strength and reduced of the air and all of reinforced concrete liquid will have a huge can cause corrosion of reinforced concrete, concrete cover thickness reduction, and ultimately accelerate the corrosion of the structure bear live loads, fatigue of reinforced concrete structures destroyed, causing the ultimate strength and stiffness of the decline, Erju and expanded to produce failure usually can be divided into fixed and random destruction, the former was used to determine the load cycle, while the latter relative to the terms of any of the materials and from the above, there are many other factors affecting example, temperature (including temperature, height, change cycle, frost, humidity (including wet and dry cycles)), and the load loading can reduce the resistance of reinforced concrete structures. time correlationThe structure of the situation is a random variable is independent of each other, and that over time the material is characterized by random timedependent function characteristics of reinforced concrete that can use the following formula:Where: The structure of the random variable that material properties of materials and test the difference。附件2：外文Timevarying resistance of reinforced concreteAbstract: Reinforced concrete analysis of the correlation time are introduced, discussed the mechanism of reinforced concrete, and then study with timedependent resistance of reinforced addition, steel reinforced concrete structure also needs to be analysis of the of resistance to change over time the actual statistical methods, including physical materials, structure size calculation to determine addition, the sample estimated change over time the resistance of reinforced concrete structures is given.Keywords: uncertainty analysis。 在論文里針對以材料為特征鋼筋混凝土進行研究，其中對混凝土產(chǎn)生影響的因素有混凝土碳化，鋼筋腐蝕。任意隨時間變化的鋼筋混凝土材料的研究對于結構測試，鋼筋混凝土結構的養(yǎng)護，