高温下钢管混凝土SHPB动态力学性能试验研究  

IMPACT TESTS ON DYNAMIC BEHAVIOR OF CONCRETE-FILLED STEEL TUBE AT ELEVATED TEMPERATURES

作　　者：何远明[1,2] 霍静思[1] 陈柏生[1] 

机构地区：[1]湖南大学建筑安全与节能教育部重点实验室,长沙410082 [2]中建国际(深圳)设计顾问有限公司,深圳518048

出　　处：《工程力学》2013年第1期52-58,共7页Engineering Mechanics

基　　金：国家自然科学基金项目(50778069;50678065);教育部长江学者和创新团队发展计划创新团队项目(IRT0619)

摘　　要：采用霍普金森压杆(Split Hopkinson pressure bar,SHPB)试验装置和特制高温试验炉进行了高温下钢管混凝土的抗冲击性能试验研究,通过测试高温下钢管混凝土的动态强度和应力-应变曲线,揭示温度和冲击速度(应变率)对高温下钢管混凝土动态力学性能的影响规律。试验结果表明,高温下钢管混凝土仍具有良好的抗冲击性能、延性和耗能能力。在该文试验参数范围内,温度作用相比冲击速度的影响更加显著。高温下钢管混凝土动态强度受试件尺寸影响显著,后续研究工作应关注钢管混凝土动态冲击荷载作用下的尺寸效应研究。The experimental study on the impact resistance of concrete filled steel tube （CFT） at elevated temperature was carried out by using a Split Hopkinson pressure bar （SHPB） and a purpose-built electrical furnace. The dynamic strength and stress-strain relation curves of a CFT at elevated temperature under high strain rate loading were measured to experimentally analyze the effects of temperature and impact velocity on the dynamic behavior of hot CFT columns. Test results showed that the CFT under high temperature had excellent impact-resistance, ductility and energy-dissipated ability. The high temperature exposure had a more remarkable effect on hot CFT columns than impact velocity. The dynamic strength of CFT under elevated temperature was sensitive to the size of CFT, and much attention should be paid to the size effect on the dynamic behaviors of CFT under impact loading.

关 键 词：钢管混凝土 SHPB 高温下 动力性能 抗冲击性能 

分 类 号：TU398.9[建筑科学—结构工程]