摘要
为研究钢管混凝土在酸性大气腐蚀下的性能劣化,进行了16个圆钢管混凝土短柱在盐雾腐蚀下的轴压试验,分别考虑了钢材等级和失重率的影响。对比分析了不同等级钢材在盐雾腐蚀下的性能劣化,以及盐雾腐蚀对圆钢管混凝土短柱轴压力学性能的影响。试验结果表明:盐雾腐蚀不仅引起钢材截面的削弱,对于钢材的力学性能也会带来一定的改变;随着失重率的增加,试件的破坏模式由剪切型逐渐变为腰鼓型,圆钢管混凝土短柱的轴压承载力和刚度都有不同程度的降低,峰值位移的变化则不大,试件的横向变形系数和延性逐渐减低。由于腐蚀使钢管削弱,试件的套箍系数随着失重率的增加而减小,但承载力试验值与名义值的比值却随着失重率的增加而增大。
In order to study the performance degradation of concrete-filled steel tubular(CFST) column under salt spray corrosion, 16 specimens of concrete-filled steel tubular stub column were tested under axial compression after salt spray corrosion. The influences of steel grade and weight-loss rate were both considered in the design of tests. The performance degradation of various grades of steel and the axial performance of concrete-filled circular steel tubular stub column under salt spray corrosion were analyzed. The results show that salt spray corrosion would not only weaken the profile of steel tube, but also change the mechanical performance of steel. With the increase of weight-loss rate, the failure modes of specimens will change from shear type to drum failure, and the axial capacity and stiffness of specimens are both decreased, while the ultimate displacement of specimens is hardly changed. The lateral deformation factor and ductility of specimens are also decreased with the increase of weight-loss rate. Due to the corrosion weakening of tube section, the confinement factor would decrease with the increase of weight-loss rate, yet the axial strength ratio between test value and nominal value shows an opposite change.
作者
高山
彭震
郭兰慧
GAO Shan;PENG Zhen;GUO Lanhui(Shaanxi Key Laboratory of Safety and Durability of Concrete Structures,Xijing University,Xi’an 710123,China;Postdoctoral Station of Civil Engineering,Chongqing University,Chongqing 400045,China;School of Civil Engineering,Harbin Institute of Technology,Harbin 150090,China)
出处
《建筑结构学报》
EI
CAS
CSCD
北大核心
2019年第S01期214-219,共6页
Journal of Building Structures
基金
国家自然科学基金项目(51908085)
陕西省自然科学基础研究计划(2019JQ-145)
西京学院高层次人才基金项目(XJ17T07)
陕西高校青年创新团队项目.
关键词
圆钢管混凝土短柱
盐雾腐蚀
酸性大气
腐蚀试验
轴压试验
轴压性能
失重率
concrete-filled circular steel tubular stub column
salt spray corrosion
acidic atmosphere
axial performance
weight-loss rate
作者简介
高山,出生于1985年,男,工学博士,副教授,主要从事钢管混凝土力学性能研究。E-mail:gaoshan@xijing.edu.cn
