聚丙烯腈纤维混凝土墩柱抗震性能试验研究  

Experimental investigation on seismic performance of polyacrylonitrile fiber reinforced concrete bridge columns

作　　者：林新鹏 卓卫东[1] 谷音[1] 孙颖[1] 陈力波[1] LIN Xinpeng;ZHUO Weidong;GU Yin;SUN Ying;CHEN Libo(College of Civil Engineering,Fuzhou University,Fuzhou,Fujian 350108,China)

机构地区：[1]福州大学土木工程学院

出　　处：《福州大学学报（自然科学版）》2019年第3期405-411,共7页Journal of Fuzhou University(Natural Science Edition)

基　　金：国家自然科学基金资助项目(51878180);福建省交通运输科技发展资助项目(201414)

摘　　要：为研究掺入聚丙烯腈纤维的混凝土墩柱的抗震性能,设计制作了3组9个具有不同纤维掺入方式的聚丙烯腈纤维混凝土墩柱试件,并对3组墩柱试件开展不同轴压比下的单向水平拟静力试验.试验结果表明:掺入适量的聚丙烯腈纤维,可使混凝土墩柱试件在极限状态下不出现保护层混凝土剥落的现象,提高其位移延性、水平极限承载力和滞回耗能能力,且轴压比越大,位移延性和水平极限承载力的提高幅度越大,而滞回耗能能力的提高幅度却相对减小;掺入聚丙烯腈纤维,基本没有改善混凝土墩柱试件的刚度退化;相比单一纤维,掺入长、短混杂聚丙烯腈纤维可更好地提高混凝土墩柱试件的抗震性能.In order to investigate the seismic behavior of polyacrylonitrile fiber reinforced concrete(PANFRC)bridge column,3 groups of 9 PANFRC bridge column specimens made with different fiber mixing methods had been designed and casted,and unidirectional horizontal pseudo static tests had been carried out for the specimens under various axial loads.The test results showed that,with adding an appropriate amount of PAN fiber,the concrete bridge column specimens can prevent spalling of the cover concrete even under the failure limit state,and improve the displacement ductility,horizontal ultimate bearing capacity and hysteretic energy dissipation capacity;the greater the axial compression ratio,the greater the increase of the displacement ductility and the horizontal ultimate bearing capacity,and the increase of the hysteretic energy dissipation capacity is relatively reduced;adding PAN fiber does not significantly improve the stiffness degradation of the specimens;compared to add single length PAN fiber,adding long and short length hybrid PAN fibers can better improve the seismic performance of the concrete bridge column specimens.

关 键 词：桥墩 抗震性能 聚丙烯腈纤维混凝土 拟静力试验 混杂纤维 轴压比 

分 类 号：U446.1[建筑科学—桥梁与隧道工程]