长期自然环境下结构中混凝土与钢筋的力学特性

试验研究了长期自然环境下结构中混凝土与钢筋力学性能，研究结果显示碳化混凝土、碳化层与未碳化层的交接面及未碳化混凝土的劈拉强度依次增大，特别是碳化混凝土的强度低于未碳化混凝土强度的试验结果与以往的研究结果有所不同；随着锈蚀率的增大，钢筋的名义屈服强度和名义极限强度都逐步降低，其力学的变化规律与民用建筑中的变化规律基本一致。

Research on Mechanical Behaviors of Structural Concrete and Reinforcement in Longterm Natural Climate

The mechanical behaviors of structural concrete and reinforcement in long-term natural climate are studied by the test. The results indicate that splitting tensile strength of carbonated zone, the zone between carbonated zone and uncarbonated zone, and uncarbonated zone increases accordingly. The result that tensile strength of carbonated zone is lower than uncarboneated zone is different from the existing results. Both nominal yield strength and nominal ultimate strength of reinforcement decrease gradually with an increasing corrosion ratio, which shows the mechanical behavior of reinforcement is the same as reinforcement in civil architecture.