早龄期钢管混凝土动态力学性能研究  

Study on dynamic mechanical properties of early aged steel tube concrete

作　　者：杨静[1] 史禄 刘翼飞 胡先尧 Yang Jing;Shi Lu;Liu Yifei;Hu Xianyao(School of Mechanic and Civil Engineering,China University of Mining and Technology(Beijing),Beijing 100083,China;Shandong Xinkuang Zhaoguan Energy Limited Liability Company,Dezhou Shandong 253000,China)

机构地区：[1]中国矿业大学(北京)力学与土木工程学院,北京100083 [2]山东新矿赵官能源有限公司,山东德州253000

出　　处：《山西建筑》2025年第4期105-108,共4页Shanxi Architecture

基　　金：国家重点研发计划子课题(课题编号:2017YFC0804204)。

摘　　要：为了研究早龄期钢管混凝土抗冲击能力,基于霍普金森压杆试验系统对C50与C30核心混凝土的钢管混凝土的动态力学性能展开研究,研究结果表明:钢管混凝土的破坏程度、动态峰值应力、动态峰值应变、吸收能占比均与冲击气压呈正相关;钢管混凝土的破坏程度从平缓到剧烈逐渐表现为表层脱落、开裂及内部碎块脱落,与混凝土设计强度正相关但与龄期负相关;冲击气压相同时,钢管混凝土的动态峰值应变、峰值应力、吸收能占比与设计强度和龄期都呈正相关,峰值应变受设计强度影响更大,峰值应力与吸收能占比受龄期即核心混凝土实际强度影响更大。In order to study the impact resistance of early aged steel tube concrete,the dynamic mechanical properties of C50 and C30 core concrete steel tube concrete were studied based on the Hopkinson pressure bar test system.The research results showed that the degree of damage,dynamic peak stress,dynamic peak strain,and absorption energy proportion of steel tube concrete were positively correlated with the impact air pressure;The degree of damage to steel reinforced concrete gradually changes from gentle to severe,manifested as surface detachment,cracking,and internal fragment detachment,which is positively correlated with the design strength of concrete but negatively correlated with age;When the impact pressure is the same,the dynamic peak strain,peak stress,and proportion of absorbed energy of steel reinforced concrete are positively correlated with the design strength and age.The peak strain is more affected by the design strength,and the proportion of peak stress and absorbed energy is more affected by the age,that is,the actual strength of the core concrete.

关 键 词：钢管混凝土 动态力学性能 霍普金森压杆试验系统 能量耗散规律 

分 类 号：TU528.59[建筑科学—建筑技术科学]