摘要
对含层面碾压混凝土试块进行了不同加载速率下的双轴压和双轴拉压试验,系统研究了加载速率对碾压混凝土强度及变形特性的影响.结果表明:在层面处理良好的情形下,碾压混凝土的拉压强度随加载速率以及侧向压力的变化规律,与常态混凝土动态拉压试验及双轴试验的变化规律有一定的相似性.根据试验结果建立了针对不同应力状态下碾压混凝土的动态强度准则,为评价爆炸及地震等动荷载作用下碾压混凝土工程结构的响应提供了参考.
Biaxial compressive and compressive-tensile loading tests on cubic roller compacted concrete （RCC） specimens with interfaces were conducted at different loading rates. The effect of loading rates on the dynamic strength and deformation properties of RCC was investigated. The results show that the change rule of strength with loading rate and lateral stress for the RCC samples with well treated interfaces is similar with that of conventional concrete material under dynamic extension, compression and biaxial tests. Based on the experimental results, dynamic failure criteria are proposed to characterize both the effect of loading rate and the effect of lateral stress on the strength of RCC under biaxial stress states, which provide reference for assessment of the safety of RCC structure under dynamic loads such as explo- sion and earthquake.
出处
《建筑材料学报》
EI
CAS
CSCD
北大核心
2015年第5期847-851,共5页
Journal of Building Materials
基金
河海大学水文水资源与水利工程科学国家重点实验室开放基金资助项目(2013491811)
清华大学深圳研究生院-城市资源循环利用工程技术研究中心开放基金资助项目(URRT2014006)
关键词
碾压混凝土
双向应力状态
加载速率
破坏模式
破坏准则
roller compacted concrete（RCC）
biaxial stress state
loading rate
failure mode
failure criteria
