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[1]WANG Dongxu,GONG Maosheng.Pseudo-static Experiment on the Seismic Performance of Graphite Tailings Concrete Columns with Optimal Substitution Rate[J].Journal of Seismological Research,2024,47(03):474-481.[doi:10.20015/j.cnki.ISSN1000-0666.2024.0049 ]

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Pseudo-static Experiment on the Seismic Performance of Graphite Tailings Concrete Columns with Optimal Substitution Rate

Journal of Seismological Research[ISSN 1000-0666/CN 53-1062/P] Volume: 47 Number of periods: 2024 03 Page number: 474-481 Column: 综述 Public date: 2024-05-01

Title:: Pseudo-static Experiment on the Seismic Performance of Graphite Tailings Concrete Columns with Optimal Substitution Rate

Author(s):: WANG Dongxu¹; 2; GONG Maosheng²; (1.Key Laboratory of Earthquake Engineering and Engineering Vibration,Institute of Engineering Mechanics,China Earthquake Administration,Harbin 150080,Heilongjiang,China;2.Key Laboratory of Earthquake Disaster Mitigation,Ministry of Emergency Management,H

Keywords:: graphite tailings concrete; mechanical properties; pseudo-static experiment; hysteretic curve; aseismic capacity

CLC:: TU375.3

DOI:: 10.20015/j.cnki.ISSN1000-0666.2024.0049

Abstract:: In order to study the optimal ratio for the graphite tailings substituting for sand and the seismic performance of the concrete column with graphite tailings,the concrete columns with graphite tailings at four ratios(10%,20%,30% and 40%)were tested to verify the pressive strength,the splitting tensile strength and the static compressive elastic modulus,and these parameters were compared with their corresponding parameters of the ordinary concrete and the optimal ratio for the graphite tailings substituting for sand was determined:30%.Then a concrete column specimen at this optimal ratio was made and was subjected to a pseudo-static experiment.Based on the specimen's damage characteristics,hysteretic curve,and skeleton curve,the seismic performance of the concrete column with graphite tailings was analyzed.The results show that the compressive strength and the tensile strength of concrete with graphite tailings at optimal ratio of 30% are the highest,and the modulus of elasticity is higher than that of concrete with other ratios and close to that of the ordinary concrete,indicating that the optimal ratio is 30%.The concrete column with graphite tailings shows bending damage characteristics under low circumferential,reciprocal,and quasi-static loading,and the hysteretic curves are full and smooth,and the column has good ductility.With the increase of horizontal displacement,the secant stiffness of the specimen gradually decreases,and the equivalent viscous damping ratio gradually increases.The column as a whole exhibits good energy-consumption capacity and seismic performance.

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Last Update: 2024-05-01