论文部分内容阅读
服役期中,钢筋混凝土结构由于承受机械荷载、受热及化学成分的作用,力学性质产生退化,其结果导致安全性降低,通常需要及时修复以保证结构的安全性。在这种情况下,借助数学工具评估不同的修复系统颇有价值。目前,对这类系统的分析和定量评估能力还具有一定的局限性。对采用FRP修复和加固的钢筋混凝土柱和梁系统,提出了评估的定量模型:一种可以评估高约束压力下混凝土结构性能的塑性破坏模型。介绍了采用FRP修复的钢筋混凝土梁、柱的应用案例。与试验结果的比较显示,所提出的模型是合理、实用的。
During the service period, due to the mechanical load, heat and chemical composition, the reinforced concrete structure degenerates its mechanical properties. As a result, the safety of the reinforced concrete structure is reduced and the structure often needs to be repaired in time to ensure the safety of the structure. In this case, using mathematical tools to evaluate different repair systems is valuable. At present, the ability to analyze and quantitatively assess such systems also has some limitations. A quantitative model for evaluation of reinforced concrete columns and girders using FRP repairs and reinforcement is presented: a plastic failure model that can evaluate the behavior of concrete structures under high confinement pressures. The application cases of reinforced concrete beams and columns repaired by FRP are introduced. The comparison with the experimental results shows that the proposed model is reasonable and practical.