Experimental study of the influence of rocks on the interlayer shear behavior of rock-filled concrete
REN Mingqian1, AN Xuehui1, TAN Ni2, LI Pengfei2
1. State Key Laboratory of Hydroscience and Engineering, Tsinghua University, Beijing 100084, China; 2. School of Hohai, Chongqing Jiaotong University, Chongqing 400074, China
Abstract：The shear resistance of rock-filled concrete (RFC) interlayers depends on the interaction between the exposed rock corners and the surrounding self-compacting concrete (SCC). This study uses 24 small direct shear tests of RFC joints to analyze the effects of the aggregate strength, exposure height and number, and normal pressure on the shear behavior of RFC joints. The results show that the aggregate significantly influences the RFC joint shear strength. Two typical failure modes are observed with compressive plastic failure of the SCC and direct shear failure of the shear rocks. The exposed height, number and strength of the aggregate as well as the normal pressure all affect the shear capacity and failure mode. Shear stress transfer theory of concrete cracks is used to develop a design method that considers the two failure modes for the RFC interlayer shear capacity. The method is verified by the test results and provides a design method for RFC interlayer shear predictions.
任明倩, 安雪晖, 谭妮, 李鹏飞. 堆石骨料对混凝土层面剪切性能影响的试验研究[J]. 清华大学学报（自然科学版）, 2019, 59(12): 967-974.
REN Mingqian, AN Xuehui, TAN Ni, LI Pengfei. Experimental study of the influence of rocks on the interlayer shear behavior of rock-filled concrete. Journal of Tsinghua University(Science and Technology), 2019, 59(12): 967-974.
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2019, Vol. 59 
