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碳纤维拉索及其锚固系统抗冲击性能试验研究
  • ISSN号:1000-131X
  • 期刊名称:《土木工程学报》
  • 时间:0
  • 分类:TU528.572[建筑科学—建筑技术科学] TU317.1[建筑科学—结构工程]
  • 作者机构:湖南大学,湖南长沙410082
  • 相关基金:国家自然科学基金(51478177)、湖南省研究生创新项目(CX20118152)
中文摘要:

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一位移曲线与试件吸能一位移曲线。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12.26kN、20.77kN和17.4kN;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。

英文摘要:

The dynamic behaviors of CFRP ( Carbon Fiber Reinforced Polymer/Plastic) cable and its anchoring system under transverse impact load were investigated by testing the embossing CFRP specimens with the diameter of 9.8mm and the anchorage assembly grouted by the RPC (Reactive Powder Concrete) using the drop hammer impact tester. Under different impact energy, the impact force of hammer head, time-history curve of cable force and failure pattern of reinforced material were tested, and then the impact force-displacement curves and the energy absorption-displacement curves were calculated based on the measured results. The results show that the typical failure patterns of CFRP cable and anchorage assembly include the slippage of reinforced material, delamination of matrix material and breakage of fibers, and their corresponding transverse impact resistance were 12.26kN, 20.77kN and 17.4kN, respectively. When subjected to multiple impacts, the energy dissipation capacity of specimens may decrease gradually. The bonding mechanism of CFRP tendon and RPC under dynamic loading differs from that under static action, which definitely deserves further investigations.

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期刊信息
  • 《土木工程学报》
  • 北大核心期刊(2011版)
  • 主管单位:这么住房和城乡建设部
  • 主办单位:中国土木工程学会
  • 主编:袁驷
  • 地址:北京三里河路9号建设部内
  • 邮编:100835
  • 邮箱:tumuxuebao@263.net
  • 电话:010-58934211 58933912
  • 国际标准刊号:ISSN:1000-131X
  • 国内统一刊号:ISSN:11-2120/TU
  • 邮发代号:2-582
  • 获奖情况:
  • 国内外数据库收录:
  • 荷兰文摘与引文数据库,美国工程索引,美国剑桥科学文摘,日本日本科学技术振兴机构数据库,中国中国科技核心期刊,中国北大核心期刊(2004版),中国北大核心期刊(2008版),中国北大核心期刊(2011版),中国北大核心期刊(2014版),中国北大核心期刊(2000版)
  • 被引量:40506