摘要
为探讨橡胶混凝土材料的阻尼耗能性能,在常温和低温条件下,橡胶粒径为20目、四种橡胶掺量的混凝土棱柱体试块进行轴向压-压滞回试验,得到了橡胶混凝土材料力-位移滞回曲线,据此分析橡胶混凝土材料阻尼耗能性能的变化规律。结果表明,低温作用后,橡胶混凝土材料压-压滞回曲线趋于饱满,耗能性能明显增大;加载力幅值水平越大,橡胶混凝土的阻尼损耗因子越大,低温下的提高幅度小于常温情况;随着橡胶掺量的增加,橡胶混凝土在低温下的滞回总耗能增长速率高于常温情况;橡胶掺量越大,其阻尼损耗因子提高的速率越显著。
In order to investigate damping energy-dissipation performance of rubber concrete materials,under normal temperature and low temperature conditions,axial compression-compression hysteresis tests were conducted for concrete prism test blocks with rubber particle size of 20 mesh and 4 rubber contents to obtain rubber concrete materials’force-displacement hysteresis curves,and analyze variation laws of damping energy-dissipation performance of rubber concrete materials.Results showed that after action of low temperature,compression-compression hysteresis curves of rubber concrete tend to be full,its energy-dissipation performance grows obviously;the larger the loading level,the larger the damping loss factor of rubber concrete,its increasing range at low temperature is less than that at normal temperature;with increase in rubber content,the hysteretic total energy-dissipation growth rate of rubber concrete at low temperature is higher than that at normal temperature;the larger the rubber content,the more significant the increase rate of damping loss factor.
作者
薛刚
张宪法
曹美玲
XUE Gang;ZHANG Xianfa;CAO Meiling(School of Civil Engineering,Inner Mongolia University of Science and Technology,Baotou 014010,China)
出处
《振动与冲击》
EI
CSCD
北大核心
2020年第19期94-100,共7页
Journal of Vibration and Shock
基金
国家自然科学基金(51868063)。
关键词
橡胶混凝土
低温
阻尼
耗能
rubber concrete
low temperature
damping
energy-dissipation
