普通混凝土基本受力形态动力性能试验研究

doi:10.11896/cldb.18040286

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Abstract In order to investigate the basic dynamic behavior of ordinary concrete, by using hydraulic servos and material shearing equipment, five kinds of different loading strain rates were set up to test the compression behavior, tensile strength and shear dynamic performance of ordinary concrete, and the failure behavior and stress-deformation curves of concrete under different loading modes were obtained. According to the stress-deformation curve, the peak stress and corresponding deformation characteristic parameters of different loading conditions were extracted to analyze the dynamic performance of the concrete under three different stress modes. The results show that there are obvious dynamic effects on the compression, tension and shear of the concrete, and the failure mode is affected by the dynamic force. With the increase of the strain rate, the peak stress of the concrete under the three stress modes is obviously increased. The influence of strain rate on the tensile loading mode is the most obvious; the peak deformation of concrete under different loading modes is affected by the loading strain rate, and the peak deformation under compression and tension is not affected by the loading strain rate. Under the action of shear load, the bending and rotation effects gradually increase with the increase of the loading strain rate, which leads to the gradual increase of shear peak deformation. According to the mathematical regression analysis of the test data in this paper, the linear relationship between the logarithm of the peak stress and the strain rate of the concrete under pressure, tension and shear force is linear.

Key words： ordinary concrete compression splitting shearing dynamic performance

Published: 31 May 2019

CLC number:

TU528.41

Fund:This work was financially supported by Key Laboratory of Failure Mechanism and Safety Control Techniques of Earth-rock Dam of the Ministry of Water Resources (YK319010), the Natural Science Foundation of the Jiangsu Higher Education Institutions of China (17KJD560004) and the National Key R & D Program of China (2016YFC0401704).

About author:: Furong Liassociate professor, Yancheng Institute of Technology, graduated from Nanjing University of Technology in 2007 with a master's degree in geotechnical engineering, and is now a doctoral candidate of the School of Transportation Engineering, Nanjing University of Technology. Nearly 40 papers have been published in academic journals at home and abroad, 3 authorized invention patents and 1 monograph have been published. They have presided over the completion of scientific research projects such as the Ministry of Housing and Urban-Rural Construction, the Jiangsu Education Department, the Housing and Urban-Rural Construction Department, and won the second prize of the Science and Technology Award of the China Business Federation, and Five Municipal Science and technology Awards such as the Housing and Urban-Rural Construction Department of Jiangsu Province and Yancheng City. He is currently a member of the National Working Committee on Urban Underground Space engineering, a member of the Seismological Society of China and a member of the Civil Architectural Society of Yancheng City.Zhenpeng Yudoctoral student, School of School of Transportation, Southeast University. From September 2016 to now, he has been a student in Southeast University. He is mainly engaged in the research of concrete strength theory and the calculation and application of bridge structure. The first author or correspondent author in important journals has published 20 papers at home and abroad, including 12 SCI/EI papers (including 2 ASCE) and 5 invention patents, including 2 authorizations (including 1 international invention patent).

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LI Furong,YU Zhenpeng,SUN Houchao. Experimental Study on the Dynamic Behavior of Ordinary ConcreteUnder Basic Force[J]. Materials Reports, 2019, 33(12): 1995-2001.

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http://www.mater-rep.com/EN/10.11896/cldb.18040286 OR http://www.mater-rep.com/EN/Y2019/V33/I12/1995

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