【作者】 陈远洲；

【导师】 蒋沧如；

【作者基本信息】 武汉理工大学 ， 结构工程， 2003， 硕士

【摘要】 碳纤维作为一种新型材料，以其密度小、模量高、强度高、刚度高、无磁性等优良性能广泛应用于各种领域，碳纤维预应力筋(CFRP)也以其优良特性应用于土木工程结构中，自从八十年代后期开始，欧、美、日本等国开始采用纤维塑料筋(Fiber Reinforced Plastic)这种新型防腐材料来代替钢筋，并开展了纤维塑料筋的材料特性和结构性能研究。在实验研究和工程应用等方面均取得了很大成果。目前，我国正在大力进行基础设施建设，从防腐性、经济性以及生产的难易程度来看，碳纤维塑料筋在道桥、水工建筑等方面有着很大的应用前景。因此，对其在混凝土结构中应用的研究有着很大的社会效益和经济效应。 混凝土结构设计方法从以弹性理论为基础的容许应力法发展到极限状态的设计方法，把单一的安全系数改为分项安全系数，把不同的材料和不同的荷载以及不同的工作情况都用不同的安全系数区分开来，使不同的构件具有比较一致的安全可靠性，而部分荷载系数和材料系数是根据统计资料用概率方法确定。 本文介绍了可靠性理论的基本原理和结构可靠度的计算方法，结构可靠度的计算方法主要有一次二阶矩法、JC法、蒙特卡洛法，并对荷载和结构抗力的统计规律进行分析，分析和总结了国内外碳纤维的基本性能、发展状况以及在工程上的应用情况，得出碳纤维预应力筋的强度分布规律为正态分布的结论，引用加拿大的一座预应力桥梁，运用可靠性理论对其进行可靠度分析，结果证明，运用蒙特卡洛法进行可靠度分析是切实可行的。 本文所采用的计算方法，同样也适用于土木工程中类似的预应力结构，在工程结构设计中具有重要的参考价值。更多还原

【Abstract】 The Carbon Fiber as a new material is widely used in all area with its little density, high module, high intensity and high stillness. The Carbon Fiber Reinforced Plastic (CFRP) is also widely used in the civil engineering construction with its high characteristic. Since later 1980, Europe, American and Japan use Fiber Reinforced Plastic to replace steel strand, and study its material and structure properties. Achieving much in experiment research and engineer application. The foreground of CFRP is visible in building and bridge. It is benefit to society and economy to study its application in concrete structure.The analysis on concrete structure has developed from the permissible stress method based on elastic theory to the limit-state design. The single safety coefficient was replaced by separate safety coefficient. The safety coefficients were used to discern different material, loads and work conditions. In this way, the reliability in different structures is consistent. Some of the load factors and material factors were defined according to statistical data.Some calculating method based on reliability theory such as JC method, MONTE CARLO method are described in this paper, and the statistic regularity for loads and structure resistance is given. The basic performance, development condition and application in the engineering are summarized. A prestressed Canada bridge is used to evaluate its reliability using reliability theory. The results suggest that the reliability analysis using Monte Carlo Method is feasible.The calculation method of this text can fit up to the similar prestressed construction in civil engineering as well. It has important reference value in engineering design.更多还原