建筑结构学报2017，Vol.38Issue(6)：133-143,11.DOI:10.14006/j.jzjgxb.2017.06.015
高温后方钢管高强混凝土界面黏结性能试验研究
Study on interface bond behavior of high strength concrete filled square steel tube after high temperatures
摘要
Abstract
In order to reveal the bond-slip behavior of high strength concrete filled square steel tube (HSCFST)experiencing high temperatures,a total of 17 high strength concrete filled square steel tube specimens were designed for push out test and the load-slip curves of the whole process and parameters of feature points were obtained from the experiments.The parameters of concrete strength,temperature and bond length were considered to research their influences on bond strength of HSCFST.Based on test mechanism analysis,the bond-slip constitutive formula of HSCFST experiencing high temperatures was put forward.Test results show that the shape of load-slip curves at the loading ends and free ends are similar.The bond strength of HSCFST is proportional to the anchoring length,and increases first and then decreases partly with the increase of the constant temperature.The bond damage of specimens with lower constant temperature develops earlier and faster than the specimens with higher constant temperature.The energy dissipation capacity of the bonding interface is generally enhanced with the increase of concrete strength,but is roughly a downward trend with increasing temperature.The strain and stress of square steel tube presents exponential distribution,and decreases from free end to load end.关键词
方钢管/高强混凝土/高温试验/静力试验/黏结强度/滑移性能Key words
square steel tube/high strength concrete/high temperature test/static test/bond strength/slip behavior分类
建筑与水利引用本文复制引用
陈宗平,刘祥,徐金俊,周文祥..高温后方钢管高强混凝土界面黏结性能试验研究[J].建筑结构学报,2017,38(6):133-143,11.基金项目
国家自然科学基金项目(51578163),广西自然科学基金重点项目(2016GXNSFDA380032). （51578163）
