| 1. | 3 ) the applications of smart concrete on the prevention of reinforcement corrosion are primarily explored 3 、利用机敏混凝土进行钢筋锈蚀防护进行了初步研究。 |
| 2. | The stochastic models for the capacity of corroded r . c . flexural members are built based on the models for reinforcement corrosion in marine environment 从氯离子侵蚀的钢筋锈蚀模型入手,建立了锈蚀钢筋混凝土受弯构件承载力随机模型。 |
| 3. | Now in the world , the reinforcement corrosion was considered as the most primary factor of the concrete structure deterioration and durability deficiency . the economic loss caused by the reinforcement corrosion is extremely huge 当今世界,钢筋锈蚀被认为是混凝土结构破坏和耐久性不足的最主要原因,由于钢筋锈蚀而导致的经济损失非常巨大。 |
| 4. | The problem of the reinforcement corrosion has already drawn the wide attention of the academic circles , and has been conducted the massive research . however the reinforcement corrosion of air - entrained concrete has not been taken into the systematic research 国内外学者对普通钢筋混凝土进行了大量研究,得出了很多重要的结论,但对引气混凝土的抗钢筋锈蚀性能研究则较少。 |
| 5. | Many factors can be concluded in this model . meanwhile the model is simple and feasible . the trial example shows the results of assessment of the degree of reinforcement corrosion coincide well with that of the experiment 建立了钢筋锈蚀量评估的bp网络模型,该模型可以同时考虑混凝土强度、保护层厚度、钢筋直径、裂缝宽度等多种影响因子,算例表明: bp网络模型的评估结果与实测结果较为一致,该模型应用简便。 |
| 6. | 2 ) the mechanisms of compression sensibility of smart concrete are studied , and the methods of applying its compression sensibility to monitor reinforcement corrosion are explored . it shows that it can effectively monitor the state of the reinforced bar by bundling uniformly smart concrete around the reinforced bar 2 、研究探讨了cfrc的压敏机理及应用其压敏性进行钢筋锈蚀监测的方法,结果表明用cfrc包裹层能有效地监测钢筋的状态。 |
| 7. | The main works of this dissertation are as follows : 1 ) the most recent durability research of reinforcement corrosion is generalized . 2 ) each calculation method of member assessment item ( including concrete cover cracking because of corrosion , concrete cover cracking limitation , chloride - ion eroding , deformation and bearing capacity ) is introduced . then the grade of corroding reinforcement concrete member is given 本文主要做了以下几个方面的工作: 1 )总结了钢筋锈蚀的耐久性研究现状; 2 )介绍了构件各个评定项目(混凝土保护层锈胀开裂、保护层锈胀裂缝限值、氯离子侵蚀、变形与承载力)的计算方法,划分了锈蚀构件耐久性评定的层次和等级,初步建立了考虑多种因素的锈蚀钢筋混凝土构件耐久性评定方法。 |
| 8. | And takes the method of passing electricity in wet environment to carry on the reinforcement corrosion acceleration to the reinforced concrete , and uses the linear polarization method to carry on the test to the polarized resistance and corrosion current density of the steel bar flowed through by electricity at different time , analyzing the rule of the change of the reinforcement corrosion parameters , and test the chloride ion diffusion coefficient to evaluate the impermeability of the concrete 本文以不同水灰比、不同含气量、不同引气剂的钢筋混凝土为研究对象,采用湿通电法对钢筋混凝土进行加速锈蚀,同时采用线性极化法对不同通电时间的极化电阻和腐蚀电流密度进行测试,分析锈蚀参数的变化规律,并通过测定cl -扩散系数来评价其抗渗性。 |
| 9. | ( 1 ) cfrc can effectively reduce the driving voltage required by catholic protection because of its good electric conductivity ; ( 2 ) applying cement - based pn - junctions on the prevention of reinforcement corrosion . in the interface of p - type region and n - type region of pn junctions a self - built electric field will be formed , and its direction is from n - type region to p - type region 由于cfrc具有良好的导电能力,利用cfrc进行阴极防护,能有效的降低阴极防护驱动电压;应用水泥基pn结的自建电场进行钢筋锈蚀防护,能在不降低结构性能的基础上提高钢筋的电子逸出功,使钢筋中的电子不易逸出,达到钢筋锈蚀防护的目的。 |
| 10. | In the northern area of our country , the climate is so cold , that the frost damage is very serious , especially in the northeast . induced air into the concrete is the most efficient way to improve the behavior of the frost resistance . therefore , studying on the reinforcement corrosion of the air - entrained concrete has important significance 我国北方地区气候寒冷,冻害比较严重,东北地区尤甚,而引气是提高混凝土抗冻性的最有效措施,因此研究引气混凝土的抗钢筋锈蚀性能有重要的现实意义和明显的经济效益。 |