局部腐蚀圆钢管混凝土柱抗震性能研究

Seismic performance of circular concrete-filled steel tubular columns with local corrosion

随着钢管混凝土结构广泛使用,钢管混凝土结构腐蚀问题引起更多人关注,其中局部腐蚀现象在日常生活中更为常见,但目前为止对局部腐蚀钢管混凝土结构抗震性能研究较少。通过有限元分析腐蚀深度、环向腐蚀长度、纵向腐蚀长度和腐蚀位置等参数对圆钢管混凝土柱抗震性能的影响。研究结果表明,随着局部腐蚀的出现,钢管混凝土柱抗震性能均有不同程度的降低,其中腐蚀深度对其影响最为显著,纵向腐蚀长度增加和腐蚀位置的降低都使得抗震性能削弱。

With the wide use of concrete-filled steel tubular structure,the corrosion problem of concrete-filled steel tubular structure has attracted more attention.in daily life,the local corrosion phenomenon is more common,but so far there are fewer studies on the seismic performance of concrete-filled steel tubular columns with local corrosion.this paper analyses the effects of parameters such as corrosion depth,circumferential corrosion length,longitudinal corrosion length and corrosion location on the seismic performance of circular concrete-filled steel tubular columns through finite element analysis.the results show that with the appearance of local corrosion,the seismic performance of circular concrete-filled steel tubular columns is reduced to different degrees,in which the corrosion depth has the most significant effect,and the increase of the longitudinal corrosion length and the reduction of the corrosion location make the seismic performance weakened.