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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

第14卷    第1期    总第82期    2017年1月

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文章编号:1672-7029(2017)01-0142-07
酸雨腐蚀后圆钢管混凝土柱抗震性能研究
陈梦成,林博洋,黄宏

(华东交通大学 土木建筑学院,江西 南昌 330013)

摘 要: 通过ABAQUS商用有限元软件建立往复荷载下酸雨腐蚀后圆钢管混凝土柱有限元模型,在钢材和混凝土本构关系模型中,考虑由锈蚀损伤引起的钢材弹性模量和屈服强度的折减,有限元模型计算的滞回曲线与试验获得的滞回曲线做对比分析,发现两者吻合程度较好,说明建立的有限元模型是有效的、可行的。基于此有限元模型,模拟酸雨腐蚀后实际工程截面尺寸的圆钢管混凝土柱在不同锈蚀率(B=0%,5%,10%,15%,20%,25%和30%)和轴压比(n=0.2,0.4和0.5)下抗震性能退化行为,数值分析结果表明:随着锈蚀率和轴压比增大,骨架曲线承载力减小,刚度出现退化和累计滞回耗能降低。

 

关键字: 圆钢管混凝土柱;酸雨;抗震性能;锈蚀率;ABAQUS

A study of seismic performance for circular concrete filled steel tubular column under acid rain attack
CHEN Mengcheng, LIN Boyang, HUANG Hong

School of Civil Engineering, East China Jiaotong University, Nanchang 330013,China

Abstract:In this paper, A finite element model for circular concrete filled steel tubular (circular CFST) columns under acid rain corrosion was proposed by using the ABAQUS commercial software, the reduction of elastic modulus and yield strength for steel was considered in the constitutive relation model of steel and concrete. Through comparison of hysteresis curve by the present model with that by the test method, it was shown that they agreed well, implying a lot that the finite element model was practicable and effective. Based on the present finite element model, deterioration of seismic performance for circular CFST column was analyzed under different corrosion rate (b=0%, 5%,10%,15%, 20%,25% and 30%) and axial compression ratio(n=0.2, 0.4 and 0.5), The results indicated that the carrying capacity of the skeleton curve reduced, stiffness degenerated, energy dissipation capacity reduced, when the corrosion rate increased.

 

Key words: circular concrete filled steel tube; acid rain; seismic performance; corrosion rate; ABAQUS

ISSN 1672-7029
CN 43-1423/U

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