1. School of Water Conservancy and Hydropower, Xi′an University of Technology, Xi′an, Shaanxi 710048, China; 2. School of Civil Engineering and Architecture, Xi′an University of Technology, Xi′an, Shaanxi 710048, China; 3. Power China Northwest Engineering Co., Ltd., Xi′an, Shaanxi 710065, China
Abstract：The compression failure process of concrete with cold joints is accompanied by the accumulation and dissipation of energy. Through uniaxial compression tests on concrete with cold joints under different pouring age intervals and different elastic modulus ratios, the influence of age intervals and elastic modulus ratios on the stress-strain curves, failure mode, strength and energy evolution was stu-died. The failure process of concrete with cold joints was studied from the angle of energy, and the stress-strain constitutive model of concrete with cold joints was established. The test results show that with the increase of elastic modulus ratio, the failure mode of concrete samples gradually changes from collaborative failure to layered failure mode. The stress-strain curve mainly goes through three stages: elastic stage, elastic-plastic stage and yield failure stage. The larger the elastic modulus ratio, the longer the age interval, and the more obvious the ″thin and tall″ curve appears. The larger the elastic mo-dulus ratio, the shorter the age interval. under uniaxial compression, the greater the elastic strain energy released by pre-peak concrete with cold joints, the greater the total energy, and the brittle failure characteristic after the peak is more obvious.
梁达,覃源*,寇佳亮,王玉龙,周恒,耿凯强. 单轴压缩荷载下带冷缝混凝土能量演化试验研究[J]. 排灌机械工程学报, 2023, 41(5): 481-486.
LIANG Da,QIN Yuan*,KOU Jialiang,WANG Yulong,ZHOU Heng,GENG Kaiqiang. Experimental study on energy evolution of concrete with cold joints under uniaxial compression. Journal of Drainage and Irrigation Machinery Engin, 2023, 41(5): 481-486.
