钢筋混凝土柱锈蚀及加固后的地震响应

在加固锈蚀钢筋混凝土柱低周反复荷载试验的基础上,根据提出的加固锈蚀构件的恢复力模型,对锈蚀钢筋混凝土加固后的结构进行了动力时程分析,研究了地震波、钢筋锈蚀及加固方式、加固材料和加固材料用量对结构抗震性能的影响。研究表明,钢筋混凝土柱锈蚀后,由于钢筋截面面积减小及钢筋与混凝土粘结性能的降低,抗震性能降低,但进行加固后,抗震性能有所恢复,恢复程度不仅与加固形式和加固材料用量有关,还与地面运动的频谱特性有关。

Seismic Response of Corroded and Strengthened RC Structural Column

The inelastic seismic response of corroded and strengthened RC structural column,whose restoring force model is established based on experiment,is studied utilizing dynamic time-history procedure,and the influences of the ground motion wave,corrosion amount of reinforcement,materials and patterns used for strengthening on the seismic behavior of the corroded and strengthened column is analyzed.The result shows that the seismic behavior of the corroded column is decayed due to the reduction of cross section areas of reinforcement and the mechanical properties of bond between reinforcement and concrete,and the seismic performance of the column may restore after the corroded column being strengthened,but the increased content depends on pattern and amount of material used for strengthening as well as the spectrum of the ground motion.