论文部分内容阅读
局部锈蚀钢筋混凝土构件的承载性能及破坏形态与均匀锈蚀构件相比有很大差异,本文采用数值模拟方法对钢筋混凝土梁在跨中锈蚀、端部锈蚀、单侧锈蚀等情况下的受弯性能展开研究。研究结果表明:跨中锈蚀导致的粘结力损失对于混凝土梁承载力并无较大影响,但是会降低锈蚀构件的抗弯刚度;两端锈蚀导致的粘结力损失会严重影响钢筋在混凝土中的锚固效果,当锈蚀率较大时会导致锚固失效,使结构材料远未达到屈服强度构件就不能继续承担荷载;单侧锈蚀的钢筋混凝土梁,当锈蚀段在距离加载点附近时,且位于粘结应力较大值区段的起始位置处,对钢筋混凝土梁的承载性能影响最大。
The bearing capacity and failure mode of locally corroded reinforced concrete members are quite different from those of uniform corroded members. In this paper, the numerical simulation method is used to study the flexural behavior of RC beams under cross-corroded, end corroded and unilateral corroded conditions Start researching The results show that the loss of bond strength caused by corrosion across the center has no significant effect on the bearing capacity of concrete beams, but will reduce the flexural rigidity of the corroded components. The loss of bond strength caused by corrosion at both ends will seriously affect the reinforcement in the concrete When the corrosion rate is larger, it will lead to failure of the anchorage, so that the structural material can not continue to bear the load far from the yield strength member. When the corrosion section is near the loading point, At the beginning of the section with larger bond stress, the bearing capacity of RC beams has the greatest impact.