持续荷载与锈蚀作用下RC梁力学性能试验研究

Mechanics Behaviors of Reinforced Concrete Beams under Sustained Load and Corrosion

采用更符合实际环境的干湿循环条件下通电加速锈蚀的方法,对不同持续荷载以及加卸载作用下的钢筋混凝土梁进行比较试验,研究钢筋混凝土梁在持续荷载和锈蚀耦合作用下的力学性能。试验结果表明:持续荷载与锈蚀共同作用下,荷载的大小与纵向钢筋锈蚀程度成正相关;钢筋混凝土简支梁的极限承载力随着持续荷载的增加而降低;同时,持续荷载水平越大,梁刚度下降速度愈快。

This paper adopts the method of power-to-accelerate-steel-corrosion test under the Cycle of Dry and Wet to do a comparative trial of various sustain loads and loading-unloading reinforced concrete beam. On this basis ,this study focuses on the mechanical properties of reinforced concrete beams under continuous loading and corrosion coupling interaction. Experiment results show that under the combined action of continuous load and corrosion, the magnitude of the load is positively correlated with the degree of longitudinal reinforcement rusting and the ultimate strength of reinforced concrete simple support beams decreases with the increase of the sustained load. Simultaneously, the greater the continuous load is, the faster the rigidity of the beam declines.