新型碳纤维索股锚固体系理论与试验研究  

Theoretical and Experimental Investigation of New Anchorage System for CFRP Strand

作　　者：诸葛萍[1] 丁勇[1] 侯苏伟[2] 强士中[3] 

机构地区：[1]宁波大学建筑工程与环境学院,浙江宁波315211 [2]北京建筑大学工程结构与新材料北京市高校工程研究中心,北京100044 [3]西南交通大学土木工程学院,四川成都610031

出　　处：《中国公路学报》2014年第12期80-87,共8页China Journal of Highway and Transport

基　　金：国家高技术研究发展计划("八六三"计划)项目(2008AA11Z101);国家自然科学基金项目(51208269);浙江省公益性技术应用研究计划项目(2014C33009);宁波市自然科学基金项目(2013A610197)

摘　　要：为实现对碳纤维增强复合材料(CFRP)索股的科学锚固,促进CFRP索股在土木工程特别是桥梁工程中的应用,开发了复合式CFRP索股粘结型锚固体系,建立了复合式CFRP索股粘结型锚固体系计算理论和设计准则,并对该体系进行了优化设计;通过静载张拉试验对新型锚固体系的综合锚固性能进行了实测,并根据试验结果对设计计算理论的可靠性进行了验证。结果表明:新型锚固体系锚固区压应力分布更加合理,其分布较传统锚具有着根本性的变化;锚固区粘结应力沿轴向分布较传统锚具更加均匀,受荷端无应力集中现象,新型锚固体系能使各CFRP筋均匀受力,锚固效率系数超过95%。For anchoring carbon fiber reinforced plastics （CFRP） strand scientifically and promoting the application of CFRP strand in civil engineering, especially in bridge engineering, the composite bond-type anchorage system for CFRP strand was developed. The mechanical calculation theory and design criteria of the new anchorage system were established, and the optimization design of the anchorage system was presented. The comprehensive performance of the new anchorage system was tested through static tensile testing, and the reliability of the mechanical calculation theory was verified by the test results. The results show that the distribution of compressive stresses in anchorage zone of the new anchorage system has a fundamental change compared with the traditional anchorage system, and it is more reasonable~ the distribution of bond stresses along the axial direction becomes more even, and there is no stress-focus phenomenon at loading end of the anchor. The anchorage system can ensure the CFRP tendons bearing tensile load uniformly, and the anchorage efficiency factor of the system is more than 95 ~.

关 键 词：桥梁工程 锚具 理论分析 碳纤维增强复合材料 静载试验 

分 类 号：U448.25[建筑科学—桥梁与隧道工程]