CFRP加固偏心受压方钢管柱稳定承载力试验研究

发布时间：2018-06-01 15:33

本文选题：CFRP + 偏心受压　；参考：《合肥工业大学》2017年硕士论文

【摘要】：碳纤维复合材料(CFRP)加固修复钢结构技术作为一种具有独特优势的加固方法,近年来成为国内外学者研究的热点。以此为依据,本文主要研究的是CFRP加固偏心受压方钢管的受力性能,尽管目前,国内外已经有一些关于CFRP加固偏心受压构件的试验研究,但是大多研究的是CFRP加固偏心受压混凝土结构构件的受力性能,对于CFRP加固偏心受压钢结构构件研究较少。本文以理论分析、试验研究及与有限元软件模拟相结合的方法,研究CFRP布加固偏心受压方钢管柱构件,文章主要研究了对于不同偏心距、CFRP粘贴层数和构件两端环向锚固对加固后钢柱稳定极限承载力和破坏形态的影响,提出修正后的CFRP加固偏心受压方管构件的稳定承载力验算公式。本文以国内外科学试验研究成果为依据,确定以英国建筑工业研究与情报协会(CIRIA)提出的换算受压截面法计算公式为理论基础,提出了CFRP加固偏心受压方管柱的稳定承载力计算公式;通过CFRP加固方钢管柱的偏心受压试验,对加固后偏心受压构件极限稳定承载力理论公式进行修正。最后,利用ANSYS有限元分析软件建立“壳-弹簧-壳”有限元模型,对偏心受压试验进行模拟分析,以此来验证修正后的理论公式。本试验的研究成果为实际的工程应用提供了理论依据,并且为正在编制的国家规范“钢结构加固设计规范”提供理论与试验依据。
[Abstract]:As a unique strengthening method, carbon fiber reinforced polymer (CFRP) has become a hot research topic in recent years. Based on this, this paper mainly studies the mechanical behavior of eccentric compressed square steel tube strengthened by CFRP, although there have been some experimental studies on CFRP strengthening eccentrically compressed members at home and abroad. However, most of the researches are on the mechanical behavior of eccentric compressive concrete members strengthened by CFRP, and less on CFRP reinforcement of eccentrically compressed steel structures. In this paper, the method of theoretical analysis, experimental study and finite element simulation is used to study the reinforcement of eccentric compressed square steel pipe column members with CFRP cloth. In this paper, the effects of different eccentricity and different eccentricity on the ultimate bearing capacity and failure mode of steel columns are studied, which are influenced by the number of CFRP bonding layers and the circular anchoring at both ends of the members. A modified formula for calculating the stability bearing capacity of eccentric compressed square tube members strengthened with CFRP is presented. Based on the scientific experimental research results at home and abroad, this paper determines the theoretical basis of the formula for calculating the conversion pressure section method proposed by the British Association for Research and Information of the Building Industry (CIRIAA). The calculation formula of stability bearing capacity of eccentric compression square column strengthened by CFRP is put forward, and the theoretical formula of ultimate stability bearing capacity of strengthened eccentric compression member is modified by eccentric compression test of CFRP strengthened square steel pipe string. Finally, the finite element model of "shell spring shell" is established by using ANSYS finite element analysis software, and the eccentric compression test is simulated and analyzed to verify the modified theoretical formula. The research results of this test provide theoretical basis for practical engineering application, and provide theoretical and experimental basis for the national code "Code for steel structure strengthening design" which is being compiled.
【学位授予单位】：合肥工业大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TU392.3

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