长细比对CFRP加固型钢混凝土柱轴压性能的影响

发布时间：2018-01-03 08:23

本文关键词：长细比对CFRP加固型钢混凝土柱轴压性能的影响　出处：《合肥工业大学》2017年硕士论文　论文类型：学位论文

【摘要】：基于对现存的试验研究分析,本文通过试验研究、有限元模拟及理论分析研究了不同长细比下碳纤维(Carbon Fiber Reinforced Polymer,简称CFRP)布约束型钢混凝土矩形短柱的轴心受压性能。试验设计并制作了1个长细比为3.2的对比试件和5个长细比从2.4~5.6的试件,并进行了轴心加载试验,通过试验认识了长细比对加固后短柱的破坏过程和最终形态以及与约束柱轴压承载力的关系。试验中所有的约束柱最终破坏都以碳纤维布断裂为标志。随着长细比的增大,约束柱的峰值荷载呈减小趋势。为了进一步研究长细比较大时柱轴压性能,采用ABAQUS软件建立了不同长细比的18个未加固型钢混凝土柱和18个CFRP加固的型钢混凝土柱,长细比范围为2.4~32。分析了柱整体破坏形态变化和CFRP布条带应变分布,确定了加固后的型钢混凝土柱界限长细比为19.2。最后参考已有模型研究,引入稳定系数,在对现有的公式进行适当的修正,确定关于柱承载力的计算公式。
[Abstract]:Based on the analysis of the existing experimental research, this paper through the experimental research. Finite element simulation and theoretical analysis have been performed to study carbon Fiber Reinforced Polymer with different aspect ratios. The axial compression behavior of steel reinforced concrete rectangular short columns confined by CFRP is studied. A contrast specimen with a aspect ratio of 3.2 and five specimens with a aspect ratio of 2.45.6are designed and fabricated. The axial loading test was carried out. Through experiments, the failure process and final form of short columns strengthened by aspect ratio and their relationship with axial compressive capacity of confined columns are recognized. The ultimate failure of all confined columns in the test is marked by the fracture of carbon fiber sheets. With the length of the columns, the ultimate failure of confined columns is marked by the fracture of carbon fiber sheets. The increase of the ratio. The peak load of confined columns is decreasing. In order to further study the axial compression behavior of columns with large length and fineness ratio. Eighteen unreinforced steel reinforced concrete columns with different aspect ratios and 18 steel reinforced concrete columns strengthened with CFRP were established by using ABAQUS software. The slenderness ratio ranges from 2.4 to 32. The variation of the failure pattern of the column and the strain distribution of the CFRP strip are analyzed. Determined the reinforced SRC column limit aspect ratio is 19.2. Finally, referring to the existing model research, introducing the stability coefficient, the existing formula is modified appropriately. The formula for calculating the bearing capacity of columns is determined.
【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】：TU398.9

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