高温后钢管混凝土抗多次冲击力学性能试验研究  

Experimental Study on the Dynamic Behavior of Concrete-Filled Steel Tube after Exposure to High Temperatures under Multiple Impact Loadings

作　　者：霍静思[1] 何远明[1,2] 肖莉平[1] 陈柏生[1] 

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

出　　处：《湖南大学学报（自然科学版）》2012年第9期6-10,86,共6页Journal of Hunan University:Natural Sciences

基　　金：国家自然科学基金资助项目(50778069);长江学者和创新团队发展计划教育部创新团队资助项目(IRT0619)

摘　　要：采用分离式霍普金森压杆(SHPB)装置进行常温和高温后(100℃,300℃,500℃和700℃)钢管混凝土多次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,分析其高温后的抗冲击动力特性.试验结果表明,高温后钢管混凝土经历多次冲击后无明显强度劣化,仍具有良好的抗多次冲击力学性能,适合做为抗火灾倒塌与军事上抗高温和重复爆炸、冲击作用的结构。An experimental study on the impact resistance of concrete filled steel tube （CFT） after exposure to high temperatures （100℃, 300℃, 500 ℃ and 700℃） under multiple impact loadings was carried out by using a Split Hopkinson pressure bar （SHPB）. The strain and stress versus time relation curves of CFT specimens were measured to experimentally analyze the dynamic behaviors of CFT under multiple impact loadings. The test results have shown that CFT after exposure to high temperature experi- ences no remarkable strength deterioration and has excellent impact-resistance to multiple impact loadings. Concrete filled steel tube is excellently suitable to resist the possible progressive collapse of structures on fire and the double actions of high temperature exposure and blasting or impact loading caused by military attacks.

关 键 词：抗冲击性能 钢管混凝土 高温后 动态强度 

分 类 号：TU398[建筑科学—结构工程]