摘要
使用有限元软件ABAQUS建立了玻璃纤维增强复合材料(Glass fiber reinforce polymer,简称GFRP)约束玄武岩纤维钢筋混凝土柱的偏心受压数值分析模型,借助其二次开发功能,编写了Python脚本,建立了玄武岩纤维在核心混凝土内部空间的随机分布模型。使用已有文献的13个试件试验数据验证了模型的合理性与正确性,结果表明:该模型可以有效模拟玄武岩纤维随机分布对试件偏压承载力的影响,同时可以有效反映试件偏压下的受力情况,得到的试件极限承载力、荷载-应变曲线和荷载-跨中挠度曲线与试验结果吻合良好。在此基础上对玄武岩纤维体积率、偏心距和长细比对组合柱偏压性能的影响进行分析,结果表明:随偏心距或长细比的增大,试件偏压刚度和极限承载力均逐渐减小,玄武岩纤维的掺入可以有效限制核心混凝土裂缝的拓展,增大试件破坏时的侧向挠度,但过高的玄武岩纤维含量会导致组合柱极限承载力的小幅下降。
The numerical analysis model of glass fiber reinforced polymer(GFRP)confined basalt fiber reinforced concrete column under eccentric compression was established in the finite element software ABAQUS.With the help of the secondary development function,the Python script was written,and the random distribution model of basalt fiber in the inner space of core concrete was established.The rationality and correctness of the model were verified by using the test data of 13 specimens in the existing literature.The results showed that the model can effectively simulate the influence of random distribution of basalt fiber on the eccentric compression bearing capacity of specimens,and can effectively reflect the stress of the specimen under eccentric compression.The load-strain curve and load mid span deflection curve were in good agreement with the test results.On this basis,the effects of volume ratio,eccentricity and slenderness ratio of basalt fiber on the eccentric compression performance of composite columns were analyzed.The results showed that with the increase of eccentricity or slenderness ratio,the eccentric compression stiffness and ultimate bearing capacity of the specimens decrease gradually.The addition of basalt fiber can effectively limit the crack expansion of core concrete and increase the lateral deflection of the specimens.
作者
姜景山
黄鑫
王志华
张超
韦有信
赵延喜
金华
JIANG Jingshan;HUANG Xin;WANG Zhihua;ZHANG Chao;WEI Youxin;ZHAO Yanxi;JIN Hua(School of Architectural Engineering,Nanjing Institute of Technology,Nanjing 211167,China;Nanjing Geo Underground Space Technology Co.,Ltd.,Nanjing 211816,China;Geotechnical Research Institute,Hohai University,Nanjing 210098,China)
出处
《混凝土》
CAS
北大核心
2022年第10期16-22,共7页
Concrete
基金
国家重点研发计划资助(2017YFC0404804)
国家自然科学基金-雅砻江联合基金重点项目资助(U1765203)
国家自然科学基金面上项目(51778282)
江苏省产学研合作项目(BY2021044)。
关键词
玻璃纤维复合材料
玄武岩纤维
钢筋混凝土
偏压性能
数值分析
极限承载力
挠度
glass fiber reinforce polymer
basalt fiber
steel reinforced concrete
eccentric compressive performance
numerical analysis
ultimate bearing capacity
deflection
作者简介
第一作者:姜景山(1978-),男,博士,副教授,研究方向:主要从事土木工程材料力学性质研究。联系地址:南京市江宁科学园弘景大道1号南京工程学院建筑工程学院(211167),联系电话:13701474141。
