【作者】 任晓虎； 霍静思； 肖岩；

【Author】 Ren Xiao-hu~1,Huo Jing-si~1,Xiao Yan~(1,2) (1.China Ministry of Education Key Laboratory of Building Safety and Energy Efficiency,Hunan University,Changsha 410082;2.University of Southern California U.S.A.CA90089)

【机构】 湖南大学教育部建筑安全与节能重点实验室； 南加州大学；

【摘要】 采用落锤冲击试验装置进行了钢管混凝土在ISO-834标准曲线下抗冲击性能试验研究,试验量测了钢管混凝土试件的冲击力和位移时程曲线。试验过程中考虑了受火时间、冲击速度和冲击能量对高温下钢管混凝土抗冲击性能的影响。试验结果表明:受火时间和冲击速度对高温下钢管混凝土试件的动态强度有很大的影响。虽然高温下钢管混凝土试件在冲击作用下产生了很大的压缩变形,但仍具有良好的截面完整性。更多还原

【Abstract】 Drop weight setup was used to experimentally study the impact resistance of concrete-filled steel tube (CFT) after exposure to ISO-834 standard fire curve.The force and compressive deformation time history curves of the tested specimens were recorded to analyze the impact behaviors of CFT columns under fire exposure.The influences of fire duration time,impact velocity and energy on the impact resistance of CFT under fire exposure are discussed.The test results showed that fire duration time and impact velocity have remarkable effects on the dynamic strength of CFT under fire exposure.Although the CFT specimens at high temperature suffered remarkable compression deformations,the CFT columns behaved in a good ductile manner under impact loading.更多还原