摘要
提出一种基于随机强度的FRP拉索多尺度性能预测模型,采用纤维浸胶纱作为模型的基本组成单元,可实现由浸胶纱到单筋,再到整索的多尺度性能预测。采用同批次的玄武岩纤维和单筋拉索进行验证试验,首先测得浸胶纱和树脂的强度分布规律,输入模型后得到单筋的强度分布,其结果与试验结果相比,在不同可靠度条件下的拟合误差均在10%以内,并且平均弹性模量和平均断裂伸长率的误差均在8%以内。该模型与传统预测方法相比具有显著优势,结果表明,树脂的剪切作用和单元强度的随机性会对拉索强度造成明显影响。
A novel multiscale tensile prediction model for FRP cable considering random strength distribution is proposed.By introducing impregnated fiber bundle(IFB)as basic element,the multiscale tensile prediction from IFB to single tendon and entire cable can be realized.Through tensile tests of fiber bundles and single tendons that are from the same batch,the effectiveness of proposed model is validated.The simulation errors of proposed model are below 10%under different reliabilities,and the average errors of modulus and ultimate strains are also lower than8%.The comparisons indicate that proposed model obtains higher accuracy than conventional methods.The simulation results also reveal that the shear deformation of resin and randomness of element strength significantly affect the strength of single tendon.
作者
彭哲琦
汪昕
吴智深
PENG Zheqi;WANG Xin;WU Zhishen(School of Civil Engineering,Southeast University,Nanjing 211189,China)
出处
《工业建筑》
CSCD
北大核心
2019年第9期1-5,共5页
Industrial Construction
基金
国家重点研发计划项目(课题编号:2017YFC0703006)
关键词
纤维增强材料强度预测
随机强度
浸胶纱
strength prediction of FRP
random strength
impregnated fiber bundle
