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作 者:孟欣 白二雷[1] 王志航 吴云泉 杨宁 MENG Xin;BAI Erlei;WANG Zhihang;WU Yunquan;YANG Ning(College of Aeronautical Engineering,Air Force Engineering University,Xi’an 710038,P.R.China;Air Force Guangzhou Engineering Design Office,Guangzhou 511458,P.R.China)
机构地区:[1]空军工程大学航空工程学院,西安710038 [2]空军广州工程设计室,广州511458
出 处:《土木与环境工程学报(中英文)》2023年第1期54-62,共9页Journal of Civil and Environmental Engineering
基 金:National Natural Science Foundation of China(No.51378497)。
摘 要:为了更好地研究纤维混凝土的力学性能,通过在聚合物混凝土中加入碳纤维进行改性来研究不同掺量碳纤维增强聚合物混凝土的抗冲击性能。采用分离式霍普金森压杆试验系统开展冲击压缩试验,从应力—应变曲线、强度和变形特性、冲击韧性等方面探究碳纤维掺量对聚合物混凝土抗冲击性能的影响。结果表明:随着碳纤维掺量的增加,聚合物混凝土的抗冲击性能先增强后减弱;当碳纤维掺量为0.2%时,混凝土的动态抗压强度最大,承受高应变率压缩荷载的变形能力最强,即碳纤维的最佳掺量为0.2%。To further elucidate the mechanical properties of fiber-reinforced concrete,carbon fiber was added to modify polymeric concrete,and the impact resistance of polymeric concrete reinforced by various contents of carbon fiber was studied.Impact compression test was carried out using a split Hopkinson pressure bar(SHPB)test system to investigate the influence of carbon fiber content on the impact resistance of polymeric concrete in terms of the stress-strain curve,strength,deformation characteristics and impact toughness.The results show that with continuous increases in carbon fiber content,the impact resistance of the polymeric concrete first increases and then decreases.When carbon fiber content increases to 0.2%,the dynamic compressive strength of the concrete,as well as the deformation capacity under high strain rate compression load,is at the maximum.Consequently,0.2%is the optimal content of carbon fiber.
关 键 词:碳纤维 可再分散乳胶粉 复合混凝土 动态抗压强度 变形性能
分 类 号:TU528.58[建筑科学—建筑技术科学]
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