The aim of this paper is to investigate concrete dynamic mechanical properties at high temperature. In order to determine the concrete specimen heating time in different temperature groups, adopt the ANSYS software to simulate the temperature field during the heating process. Impact loading experiments were carried out on concrete at high temperature and different heating time by using a 75-mm-diameter split Hopkinson pressure bar (SHPB) apparatus and temperature control device. The results show that C60 concrete has obvious temperature effect and time effect. The dynamic compressive strength rises at first and then falls with increasing temperature and achieves the maximum at about 200℃, the peak strain rises with temperature increasing; Under 100℃, 200℃, 300℃, 400℃ and 500℃ steady-state temperature fields respectively, with increasing temperature, the dynamic compressive strength decreases and the peak strain rises and the elastic modulus decreases, and in the 500℃ steady temperature field, when the heating time being greater than 190 min, the dynamic compressive strength is tending towards stability and no longer decreases.
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References
[1] 何远明，霍静思，陈柏生，等. 高温下混凝土SHPB动态力学性能试验研究[J]. 工程力学. 2012(09): 200-208.
HE Yuan-ming, HUO Jing-si, CHEN Bai-sheng, et al. Impact tests on dynamic behavior of concrete at elevated temperature[J]. Engineering mechanics. 2012(09): 200-208.
[2] 李志武，许金余，白二雷，等. 高温后混凝土SHPB试验研究[J]. 振动与冲击. 2012(08): 143-147.
LI Zhi-wu, XU Jin-yu, BAI Er-lei, et al. SHPB test for post-high-temperature concrete[J].Journal of vibration and shock. 2012(08): 143-147.
[3] 李奎，陶俊林. 水泥砂浆高温SHPB实验及动态力学特性研究[J]. 武汉理工大学学报. 2010(24): 22-27.
LI Kui, TAO Jun-lin. Research on impact compressive experiment and dynamic mechanic behavior of cement mortar at high temperature[J]. Journal of Wuhan university of technology. 2010(24): 22-27.
[4] 范飞林，许金余，李志武，等. 高温下混凝土动态力学特性试验[J]. 材料热处理学报. 2012, 33(3): 22-27.
FAN Fei-lin, XU Jin-yu, LI Zhi-wu, et al. Experiment for dynamic mechanical properties of concrete at high temperatures[J]. Transactions of materials and heat treatment. 2012, 33(3): 22-27.
[5] 陶俊林，秦李波，李奎，等. 混凝土高温动态压缩力学性能实验[J]. 爆炸与冲击. 2011(01): 101-106.
TAO Jun-lin, QIN Li-bo, Li Kui, et al. Dynamic compressive mechanical property test of concrete at high temperature[J]. Explosion and shock waves. 2011(01): 101-106.
[6] 贾彬，李正良，陶俊林，等. 混凝土高温动态特性SHPB试验研究[J]. 武汉理工大学学报. 2010(21): 34-37.
JIA Bin, LI Zheng-liang, TAO Jun-lin, et al. SHPB Test on high temperature dynamical mechanical behavior of Concrete[J]. Journal of Wuhan university of technology 2010(21): 34-37.
[7] 贾彬，陶俊林，李正良，等. 高温混凝土动态力学性能的SHPB试验研究[J]. 兵工学报. 2009(S2): 208-212.
JIA Bin, TAO Jun-lin, LI Zheng-liang, et al. SHPB test for dynamic mechanical performances of concrete at high temperatures[J]. Acta armamentarii. 2009(S2): 208-212.
[8] Li Z, Xu J, Bai E. Static and dynamic mechanical properties of concrete after high temperature exposure[J]. Materials Science and Engineering: A. 2012, 544(0): 27-32.
[9] 巫绪涛，谢思发，胡俊. EPS混凝土的动态抗压强度和吸能特性[J]. 振动与冲击. 2013, 32(17): 133-137, 182.
WU Xu-Tao, XIE Si-fa, HU Jun. Dynamic compressive strength and energy absortion property of EPS concrete[J]. Journal of Vibration and Shock. 2013, 32(17): 133-137, 182.
[10] 宋力，胡时胜. SHPB数据处理中的二波法与三波法[J]. 爆炸与冲击. 2005(04): 368-373.
SONG Li, HU Shi-sheng. SHPB two waves method and three waves method of data processing. Explosion and shock waves. 2005(04): 368-373.
[11] 肖明辉，时旭东，邢万里. 不同等级混凝土强度高温衰退性能试验研究[J]. 建筑结构. 2009(07): 113-115.
XIAO Ming-hui, SHI Xu-dong, XING Wan-li. Experimental research on strength decaying of concrete with different grades at elevated temperature[J]. Architectural structure. 2009(07): 113-115.
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