碳纤维拉索及其锚固系统抗冲击性能试验研究

发布时间：2018-01-27 08:45

本文关键词： 碳纤维筋活性粉末混凝土锚固性能落锤抗冲击性能　出处：《土木工程学报》2015年12期 　论文类型：期刊论文

【摘要】：为研究碳纤维(Carbon Fiber Reinforced Polymer/Plastic,简称CFRP)拉索及其锚固系统在冲击荷载作用下的动力性能,采用落锤冲击试验机,对直径9.8mm的表面压纹CFRP筋及粘结式锚具组装件的横向抗冲击性能进行了试验研究。实测了不同冲击能量下锤头冲击力及筋材的索力时程曲线和破坏形态,根据实测结果计算了冲击荷载-位移曲线与试件吸能-位移曲线。结果表明:CFRP拉索锚具组装件的破坏形态包括筋材的滑移、基体的层裂和纤维的剪断,相应的横向抗冲击承载力分别为12.26k N、20.77k N和17.4k N;试件承受多次冲击时,耗能能力逐次降低;CFRP筋与RPC在动力作用下的粘结机理有别于静力作用,值得进一步研究。
[Abstract]:To study carbon Fiber Reinforced Polymer/Plastic. The dynamic performance of CFRP cable and its anchoring system under impact load is studied by drop hammer impact testing machine. The transverse impact resistance of surface embossed CFRP bars and bonded Anchorage assemblies with a diameter of 9.8 mm was experimentally studied. The impact force of hammer head, the time history curve of cable force and breaking force of steel bars were measured under different impact energy. Bad form. According to the measured results, the shock load-displacement curve and the energy-absorbing displacement curve of the specimen are calculated. The results show that the failure modes of the assembly of the cable Anchorage include the slippage of the steel bar, the spallation of the matrix and the shearing of the fiber. The corresponding transverse impact bearing capacity is 12.26kN 20.77kN and 17.4kN respectively. When the specimen is subjected to multiple shocks, the energy dissipation capacity decreases successively. The bonding mechanism of CFRP bar and RPC under dynamic action is different from that of static force, so it is worthy of further study.
【作者单位】：湖南大学;
【基金】：国家自然科学基金(51478177) 湖南省研究生创新项目(CX2011B152)
【分类号】：U446
【正文快照】： 引言碳纤维增强复合材料CFRP(Carbon FiberReinforced Polymer/Plastic)以其强度高(有的高于3000MPa,约为高强预应力钢筋的2倍)、重量轻(约为钢材的1/5)和免锈蚀等优异的物理力学性能,已成为土木工程中极具应用前景的建筑材料,并有望成为恶劣自然环境下大跨桥梁传统钢制拉索或

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