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《Journal of Liaoning Technical University(Natural Science)》 2016-04
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Time effect experimental research of the concrete dynamic Mechanical property after high temperature

LIANG Shufeng;LIU Dianshu;LI Hongchao;WANG Yutao;School of Mechanics & Civil Engineering, China University of Mining and Technology (Beijing);  
In this paper the temperature field during the heating process is simulated to determine the C60 concrete specimen heating times in different temperature groups by using the ANSYS software.Impact loading experiments were carried out on concrete at high temperature and different heating time by using the high temperature split Hopkinson pressure bar apparatus. The results show that C60 concrete has obvious softening effect and time effect after high temperature and different heating time and then natural cooling. The dynamic compressive strength decreases gradually with increasing temperature, the peak strain rises first and then falls slightly with temperature increasing but always being higher than the peak strain under room temperature; Under the same temperature and different heating time condition, with increasing temperature, the dynamic compressive strength decreases and the peak strain increases first and then decreases generally and the elastic modulus decreases.
【Fund】: 国家自然科学基金项目(20100023110001)
【CateGory Index】: TU528
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