摘要
采用自由振动法对混凝土简支梁进行试验,以测量小变形情况下不同橡胶掺量和橡胶粒径对橡胶混凝土阻尼比的影响.同时,测量了橡胶掺量和粒径对简支梁的自由振动频率的影响.用弹性波法测量了橡胶混凝土的动弹性模量,并对动弹模和静弹模的试验结果进行了比较.试验结果发现,橡胶混凝土的阻尼较之普通混凝土有显著提高,弹性模量和基频随橡胶掺量的增加而降低.
The effects of the size and volume of rubber particles on the damping ratio and frequency of simply supported rubberized concrete beams were studied by free vibration test under small deformation condition. Elastic wave test was used to measure the dynamic modulus of rubberized concrete, and a comparison between the static modulus and the dynamic one was conducted. Rcsults show that the rubberized concrete has higher damping ratio and lower elastic modulus, and thus lower natural frequency for elements.
出处
《同济大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2008年第9期1186-1190,共5页
Journal of Tongji University:Natural Science
关键词
橡胶混凝土
动弹性模量
阻尼比
弹性波法
rubberized concrete
dynamic modulus of elasticity
damping ratio
elastic wave method
