聚对苯二甲酸乙二醇酯纤维布约束中空夹层钢管混凝土柱轴压性能试验研究

发布时间：2018-03-11 01:31

本文选题：中空夹层钢管混凝土柱　切入点：PET　出处：《建筑结构学报》2015年S1期 　论文类型：期刊论文

【摘要】：进行了聚对苯二甲酸乙二醇酯纤维(PET)和碳纤维(CFRP)布约束中空夹层管混凝土柱的轴心受压试验研究。主要试验参数包括外包材料种类(PET、CFRP)、外钢管厚度、内钢管直径以及外钢管是否开孔等。试验结果表明:外包PET柱较对应外包CFRP柱的极限荷载平均提高了14.71%,极限位移平均提高了104.73%,表明PET在对中空夹层钢筋混凝土轴压承载力及延性的贡献上较CFRP更为明显。在试验的基础上分析了PET和CFRP对构件轴压承载能力及延性的提升效果,可得出外包PET或CFRP均能显著提高结构的轴向承载力和延性的结论,其中PET效果更好。最后结合现有的双层薄壁钢管混凝土柱及FRP外包混凝土柱的承载力计算模型,提出了CFRP/PET环包中空夹层钢管混凝土构件的轴压承载力计算模型,并通过与试验结果的对比验证了模型的准确性。
[Abstract]:The polyethylene terephthalate fiber (PET) and carbon fiber (CFRP) experimental research on axial compression confined hollow sandwich pipe concrete column. The main parameters include outsourcing materials (PET, CFRP), and the thickness of steel tube, the inner tube diameter and tube with or without holes. The experimental results show that the ultimate load compared with the corresponding CFRP outsourcing outsourcing PET column column with an average increase of 14.71%, the limit displacement was increased by 104.73%, indicating that PET in the hollow sandwich reinforced concrete axial compression bearing capacity and ductility of the contribution is more obvious than CFRP. PET and CFRP analysis of axial compression bearing capacity and ductility improvement based on test on the outsourcing of PET or CFRP can significantly improve the structure of the axial bearing capacity and ductility of the conclusion, the PET effect is better. Finally, combined with the existing double concrete-filled thin-walled steel tubular columns and concrete columns FRP outsourcing The bearing capacity calculation model is put forward, and the axial compression bearing capacity calculation model of CFRP/PET ring wrapped hollow concrete filled steel tubular members is put forward. The accuracy of the model is verified by comparing with the experimental results.

【作者单位】：浙江大学结构工程研究所;
【基金】：中央高校基本科研业务费专项资金项目(513201*172210251) 教育部博士点基金青年教师项目(20130101120077)
【分类号】：TU398.9

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