【摘要】 针对不同配合比及不同掺料的混凝土,通过自行研究的简支梁法测试装置对大尺寸混凝土材料试件进行了阻尼特性的研究。试验主要研究陶粒混凝土、橡胶混凝土和普通混凝土8个试件的共振幅值、混凝土应力应变等因素与混凝土试件损耗因子之间的关系。结果表明激振幅值小于临界共振幅值时,试件阻尼损耗因子并不受共振的影响,并且混凝土应变在1.6×10-7².4×10^-7范围内时,阻尼损耗因子与应变和应变率无关。更多还原

【Abstract】 Studying the large size concrete specimens damping characteristics with the simply support beam method for the various mixes and different admixtures concrete. It mainly studied the relationship between the resonant amplitude,stress,strain and the loss factor of the eight specimens include the ceramic concrete,rubber concrete and ordinary concrete. The results showthat the specimen is not affected by the damping loss factor of the resonance when the resonant excitation amplitude is less than the critical amplitude.And the damping loss factor independent of the strain and strain rate when the concrete strain in 1.6 × 10^-72.4 × 10^-7range.更多还原