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论文类型：期刊论文

发表时间：2015-03-01

发表刊物：MAGAZINE OF CONCRETE RESEARCH

收录刊物：SCIE、EI、Scopus

卷号：67

期号：6

页面范围：282-293

ISSN号：0024-9831

摘要：The dynamic properties of large aggregate concrete under the triaxial loading state of tension-compression-compression (T-C-C) are experimentally investigated. The loads of each specimen in three directions are increased monotonically following a fixed load ratio at constant strain rate of 10(-5)/s, 10(-4)/s, 10(-3)/s or 10(-2)/s. Based on the experimental results, the specimens under triaxial T-C-C are ruptured by one apparent tensile crack perpendicular to the direction of the applied tensile loading. It is revealed that the shapes of the stress-strain curves corresponding to different strain rates are similar to each other at the same stress ratio. The tensile strength and secant modulus under triaxial T-C-C increase with the increase of strain rate, but decrease with the increase of lateral compressive stress. Meanwhile, the tensile critical strain under triaxial T-C-C increases slightly with the increase of strain rate, but increases significantly with the increase of lateral compressive loading. The dynamic failure criterion for large aggregate concrete under triaxial T-C-C in octahedral stress space is proposed.