摘要
采用分离式霍普金森压杆(SHPB)装置进行了15个钢管混凝土在不同温度(常温到400℃)下的抗冲击性能试验研究,通过测量试件的应变时程曲线和应力时程曲线,分析其高温下的抗冲击动力特性。试件破坏形态和实测荷载-变形关系曲线表明,钢管混凝土具有良好的高温下抗冲击力学性能,即具有较高的强度和屈服后承载能力,以及良好的塑性变形能力和完整性。
The impact behavior of 15 concrete-filled steel tubes （CFT） specimens under different temperatures ranging from room temperature to 400℃ was experimentally studied using a spilt Hopkinson pressure bar （SHPB）. The stress and strain time history curves of the tested specimens were recorded to analyze the impact behavior of CFT under high temperatures. The failure patterns and the recorded load versus deformation curves demonstrate that the CFT has an excellent impact-resistant behavior under high temperatures, i.e. relatively higher strength and post-yielding strength, excellent plasticity and integrity of the composite section.
出处
《工程力学》
EI
CSCD
北大核心
2009年第5期142-147,共6页
Engineering Mechanics
基金
国家自然科学基金项目(50678065,50778069)
长江学者和创新团队发展计划项目(IRT0619)
关键词
钢管混凝土
抗冲击性能
分离式霍普金森压杆(SHPB)
高温下
应变率
concrete-filled steel tube （CFT）
impact-resistance
split Hopkinson pressure bar （SHPB）
high temperature
strain rate
